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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
I want to buy reference book for physics can u suggest me which book is best |
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Answer» Oswall book Ya ya S Chand is the best I recommend you only s chand s Chand is the best book |
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| 452. |
How do hydrogen ions exist in water??? |
| Answer» \tThe hydroxide concentration is a direct measure of a solution\'s pH. This may be formed in water/pure water where an acid exist. H3O+ is its chemical formula By combining an\xa0H+ion with an H2O molecule,\xa0it is formed too.\tThe H+ion has a trigonal pyramidal geometry\xa0and comprises 1 oxygen atom and 3 hydrogen atoms. There is a single pair of electrons in oxygen that gives it this shape. Between the atoms, the bond angle is around 113 degree. ---- H2O(l)⇌OH−(aq)+H+(aq\tAs H+ions are formed, they bond with H2O molecules\xa0in the solution to form H3O+(the hydronium-ion). This is due to the hydrogen ions that is not present in aqueous solutions, however takes the form of water H2O | |
| 453. |
Explain double circulation in human beings ? Why it is necessary. |
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Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature. I HOPE IT HELPS YOU During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature. |
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| 454. |
What are tooth decoy |
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Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? It is a condition which causes a softening of the tooth enamel. It happens when biological bacteria in our mouth produces sufficient acids from sugars to Decay the enamel of dentine Tooth decay occurs at an acidic pH around 5 or below. The microorganisms of the mouth converts sugars into acids, resulting in decrease of the pH of the saliva. In the presence of these acids, the enamel\xa0of the teeth is degraded, and it leads to tooth decay. |
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| 455. |
Why does leaf appear green???? |
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Answer» Because chlorophyll reflects away the green wavelength of light and absorbs mainly red and blue wavelengths. Because of chlorophyll.It provide green colour pigment. Because it reflects green light which s not essential for photosynthesis Because of chlorophyll Bcause of chlorophyll |
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| 456. |
What is the pH of gastric juice,which is released during digestion. |
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Answer» Is 2 2.5 to 3.5 The pH of gastric acid is\xa01.5 to 3.5\xa0in the human stomach lumen |
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| 457. |
Notes for "Our Environment" |
| Answer» CBSE Class 10 ScienceRevision NotesCHAPTER – 15OUR ENVIRONMENTEnvironment means everything which surrounds us. It may include living (biotic) and non-living (abiotic) components.Biotic : Plants and animals. Abiotic : Air, water etc.Environment affect the life and development of an organism in its natural habitat & vice a versa.Substances that can be decomposed by the action of micro-organism like bacteria are called bio-degredable. E.g. organic wastes.Substances which cannot be decomposed by the action of microorganisms are called non-biodegradable.Example of biodegradable wastes : cattle dung, cotton, jute, paper, fruit and vegetable peels, leaves etc.Examples of non-biodegradable wastes : plastics, polythene bags, synthetic fibres, metals, radioactive wastes.ECO SYSTEM & ITS COMPONENTAll the interacting living organisms in an area together with non living components form an ecosystem. So an ecosystem consists of both biotic(living creatures) and abiotic components like temperature, rainfall, wind, soil etc.All living organisms are classified on the basis nutrition.I.\xa0Producers :\xa0All green plants, blue green algae can produce their food (Sugar & starch) from inorganic substance using light energy (Photosynthesis).II.\xa0Consumers\xa0: Include organisms which depend on the producers either directly or indirectly for their sustenance. Consumers depend on others for food.III.\xa0Decomposeres\xa0: Fungi & Bacterias which break down(decompose) the dead plant,animals complex compounds into the simpler one. Thus decomposeres help in the replenishment\xa0A 3- Step Food ChainFood Chain\xa0: It is the sequence of living organisms in which one organism consumes another organism for energy. It is unidirectional(single directional).In a food chain, various steps where transfer of energy takes place is called a trophic level.The green plants capture 1% of sun’s energy.The flow of energy is unidirectional in a food chain.There is gradual decrease in the amount of energy from one trophic level to next trophic level in a food chain.10 Percent Law :\xa0The energy available at each successive trophic levelis 10% of the previous level.So only 10% of Energy is transferred to next trophic level while 90%of energy is used by present trophic level in its life processes.The concentration of harmful chemical increases with every next trophic level in a food chain. It is called Bio-magnificationMaximum concentration of such chemicals get accumulated in human bodies. Since humans occupy the top level in any food chain.ENVIRONMENTAL PROBLEMSChanges in environment affect us and our activities change the environment around us. Environmental problems caused by humans:(a) depletion of the Ozone Layer and waste disposal.(b) pollution due to mismanagement of waste disposal.I. Depletion of Ozone LayerOzone (O3) layer is largely found in the stratosphere which is a part ofour atmosphere from 12 km – 50km above sea level.Ozone is a deadly poison at the ground level.Ozone is formed as a result of a following photochemical reaction.Ozone layer is a protective blanket around earth which absorbs most of the harmful U.V. (Ultraviolet) radiation of the Sun, thus protecting the living beings of the earth from health hazards like skin cancer, cataract in eyes, weaken immune system, destruction of plants etc.The decline of Ozone layer thickness in Antartica was first observed in 1985 and was termed as\xa0OZONE HOLE.Reason of Ozone DepletionExcessive use of CFCs (Chloro Flouro Carbon) a synthetic, inert chemical E.g. Freon which are used as refrigerants and in fire extinguishers, caused Ozone depletion in the upper atmosphere. A single chlorine atom can destroys 1,00,000 Ozone molecules. U.N.E.P. (United Nation Environment Programme)did an excellent job in forging an agreement to freeze CFC production at 1986 levels (KYOTO Protocol) by all countries.Garbage DisposalIndustrialization and rise in demand of consumer goods have created a major problem in the form of wastes/garbage accumulation and its disposal specially in urban area.The different methods of solid wastes disposal commonly used aroundthe world are.1.\xa0Open dumping\xa0: A conventional method in which solid wastes dumped in selected areas of a town. It actually cause pollution2.\xa0Land fillings\xa0: Wastes are dumped in low living area and are compacted by rolling with bulldozersComposting\xa0: Organic wastes are filled into a compost pit (2m × 1m× 1m). It is then covered with a thin layer of soil. After about three months the same garbage filled inside the pit changes into organic manure.4.\xa0Recycling\xa0: The solid wastes is broken down into its constituent simpler materials. These materials are then used to make new items. Even non-bio degradable solid wastes like plastic, metal can be recycled.5\xa0Reuse\xa0: A very simple conventional technique of using an item again& again. For e.g. paper can be reused for making envelops etc.What you have learntThe various components of an ecosystem are interdependent.The producers make the energy from sunlight available to the rest of the ecosystem.There is a loss of energy as we go from one trophic level to the next, this limits the number of trophic levels in a food-chain.Human activities have an impact on the environment.The use of chemicals like CFCs has endangered the ozone layer. Since the ozone layer protects against the ultraviolet radiation from the Sun, this could damage the environment.The waste we generate may be biodegradable or non-biodegradable.The disposal of the waste we generate is causing serious environmental problems. | |
| 458. |
Sir /mam please give test |
| Answer» There has no sir and mam | |
| 459. |
Notes for human eye |
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Answer» Thank to all 1. The Human Eye It is a natural optical instrument\xa0which is used to see the objects by human\xa0beings. It is like a camera which has lens and\xa0screen system.(i) Retina :\xa0It is a light sensitive screen inside\xa0the eye on which image is formed. It contains\xa0rods and cones.(ii) Cornea :\xa0It is a thin membrane which covers\xa0the eye ball. It acts like a lens which refracts the\xa0light entering the eye.(iii) Aqueous humour :\xa0It is fluid which fills the\xa0space between cornea and eye lens.(iv) Eye lens :\xa0It is a Convex lens made of\xa0transparent and flexible jelly like material. Its\xa0curvature can be adjusted with the help of ciliary\xa0muscles.(v) Pupil :\xa0It is a hole in the middle of iris\xa0through which light enters the eye. It appears\xa0black because light falling on it goes into the\xa0eye and does not come back.(vi) Ciliary muscles :\xa0These are the muscles\xa0which are attached to eye lens and can modify\xa0the shape of eye lens which leads to the\xa0variation in focal lengths.(vii) Iris :\xa0It controls the amount of light entering\xa0the eye by changing the size of pupil.(viii) Optical nerve :\xa0These are the nerves which\xa0take the image to the brain in the form of electrical\xa0signals.2. Accomodation power :\xa0The ability of eye to\xa0change the focal length of eye lens with the\xa0help of ciliary muscles to get the clear view of\xa0nearby objects (about 25 cm) and far distant\xa0objects (at infinity).3. Colour blindness :\xa0Some people do not possess\xa0some cone cells that respond to certain specific\xa0colours due to genetic disorder.4. Myopia (Short sightedness) :\xa0It is a kind of\xa0defect in human eye due to which a person can\xa0see near objects clearly but he can not see the\xa0distant objects clearly.\xa0Myopia is due to(i) excessive curvature of cornea.(ii) elongation of eye ball. Either, if you want so it is given in this app May be this chapter is removed from the syllabus |
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| 460. |
Define platelets. |
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Answer» \tPlatelets are a type of blood cells present in our blood.\tPlatelets contain fibrinogen protein which help in clotting of blood during a cut or injury. A tiny, disc-shaped piece of cell that is found in the blood and spleenThey help form blood clots to slow or stop bleeding and to help wounds heal. |
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| 461. |
Who have completed whole science book??? |
| Answer» Last year students..........LOL | |
| 462. |
For this year which topics are there on carbon and it\'s compounds? |
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Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Functional groups Homologous series Unsaturated and saturated carbon compounds |
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| 463. |
What is the pH scale of human body |
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Answer» About 7.4 7.40 7.0-7.8 |
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| 464. |
Search this on Google ? - "do a barrer roll" and see the results???? |
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Answer» Nice Thanks yarr for sharing it among us ??? Thanks for sharing with us. Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Oh my god .........the page is turning around ? |
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| 465. |
what are the laws of inheritance? |
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Answer» The three laws given by Mendel are:i. Law of dominance - According to this law, when a cross is made between two homozygous individuals, only one of the two characters of the pair (dominant) appears in the F1 generation. There is the appearance of both the characters in F2 generation.ii. Law of segregation - This law states that the characteristics of an organism are determined by the internal factors which occur in pairs. Only one of a pair of such factors can be present in a single gamete.iii. Law of independent assortment - This law states that in the inheritance of more than one pair of traits in a cross simultaneously, the factors responsible for each pair of traits are distributed independently to the gametes. Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? |
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| 466. |
Derivation of electric power formula |
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Answer» P=w/t ,(as w=vq)P=vq/t Nhi pra |
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| 467. |
What is the difference between sexual reproduction and Asexual reproduction ? |
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| 468. |
Do magnetic field lines of two different magnets ever intersect each other? |
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Answer» No No it is not possible The two magnetic field lines do not intersect each other because if they do it means at the point of intersecting the compass needle is showing two different directions which are not possible. What us amoeba function |
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| 469. |
Why an electric current is a scalar quantity although it possesses magnitude and direction? |
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Answer» What is water crystalisation Electric current is a scalar quantity. Any physical quantity is termed as a vector quantity when the quantity has magnitude and direction. But there are other factors that determine the quantity as vector or scalar quantity. If the physical quantity obeys the laws of vector addition such as triangle law of vector addition and parallelogram law of vector addition, then the quantity is said to be a vector quantity.In the case of electric current, when two currents meet at a junction, the resultant current of these will be an algebraic sum and not the vector sum. Therefore, an electric current is a scalar quantity although it possesses magnitude and direction. |
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| 470. |
Write structure and function of different parts of human eye |
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Answer» I\'m sorry I\'ve to write ajin instead of Mayank rai .....Thanks u ajin for this long answer Thank u Mayank rai for this answer but you\'re late still thanks you for answering my questions ?did you learn it or you just paste it. ? Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Galat h bada karne wali hui priyanka The human eyes are the most complicated sense organs in the human body. From the muscles and tissues to nerves and blood vessels, every part of the human eye is responsible for a certain action. Furthermore, contrary to popular belief, the eye is not perfectly spherical; instead, it is two separate segments fused together. It is made up of several muscles and tissues that come together to form a roughly spherical structure. From an anatomical perspective, the human eye can be broadly classified into the external structure and internal structure.The External Structure of an EyeThe parts of the eye that are visible externally include the following:-Sclera: It is a white visible portion. It is made up of dense connective tissue and protects the inner parts.Conjunctiva: It lines the sclera and made up of stratified squamous epithelium. It keeps our eyes moist and clear and provides lubrication by secreting mucus and tears.Cornea: It is the transparent, anterior or front part of our eye, which covers the pupil and the iris. The main function is to refract the light along with the lens.Iris: It is the pigmented, coloured portion of the eye, visible externally. The main function of the iris is to control the diameter of the pupil according to the light source.Pupil: It is the small aperture located in the centre of the Iris. It allows light to enter and focus on the retina.Further Reading: Stereoscopic Vision The Internal Structure of an EyeThe internal components of an eye are:Lens: It is a transparent, biconvex, lens of an eye. The lens is attached to the ciliary body by ligaments. The lens along with cornea refracts light so that it focuses on the retina.Retina: It is the innermost layer of the eye. It is light sensitive and acts as a film of a camera. Three layers of neural cells are present in them, they are ganglion, bipolar and photoreceptor cells. It converts the image into electrical nerve impulses for the visual perception by the brain.Optic nerve: It is located at the posterior portion of the eyes. The optic nerves carry all the nerve impulses from the retina to the human brain for perception.Aqueous Humour: It is a watery fluid present between the cornea and the lens. It nourishes the eye and keeps it inflated.Vitreous Humour: it is a transparent, jelly-like substance present between the lens and the retina. It contains water (99%), collage, proteins, etc. The main function of vitreous humour is to protect eyes and maintain its spherical shape. I Hope It Helps You |
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| 471. |
Prove the formula m=h\'/h |
| Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? | |
| 472. |
Give scientific reason: Respiration is an exothermic reaction |
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Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? An exothermic reaction is a reaction in which energy is liberated out.Respiration is considered as exothermic reaction because energy is released in this process.Glucose combines with oxygen present in our cells to form carbon dioxide and water along with energy.C₆H₁₂O₆ + 6O₂ ----> 6CO₂ + 6H₂O + energy |
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| 473. |
Describe Excretion system in man. |
| Answer» Excretion in human beings\tA pair of kidneys, a pair of ureters, a urinary bladder and a urethra constitutes the human excretory system.\tKidneys are present on either side of the backbone in the abdomen.\tKidneys produce urine and urine from kidney passes through the ureters into the urinary bladder and remains stored their until it is released through the urethra.\tUrine is produced to filter out waste products from the blood.\tNephrons are basic structural and functional unit of kidney.\tCluster of thin walled blood capillaries called\xa0glomerulus\xa0in the nephron filtrate the urine and each cluster is associated with cup shaped end of a tube called\xa0Bowman’s capsule. | |
| 474. |
What is ecosystem and its components |
| Answer» Ecosystem:\xa0All organisms such as plants, animals, microorganisms and human beings interact with the non-living physical surroundings in an area called as the ecosystem.The structural component of an ecosystem may be classified under two main types:1. Biotic components2. Abiotic componentsBiotic components comprise the living organisms present in an ecosystem. These include plants, animals and micro-organisms (bacteria and fungi). The biotic component of an ecosystem has been classified into three groups:1. Producers (green plants)2. Macro consumers (usually animals)3. Micro consumers or decomposers (organisms like bacteria and fungi).Abiotic components consist of the non-living components like light, temperature, water, oxygen,carbon, nitrogen and minerals. Various important abiotic factors have been classified as follows:1. Climatic factors: These include light, temperature, precipitation, atmospheric humidity and wind.2. Topographic factors: These include altitude, surface slope and exposure, etc.3. Edaphic factors: These include soil and substratum. | |
| 475. |
Problems based on charge and electric flow |
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| 476. |
Balance chemical equation hno3+ca(oh)2 equal to ca(no3)2+h2o |
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Answer» 2Hno3+ca(oh)2= ca(no3)2 + 3h2o 2HNO3+Ca(OH)2= Ca(NO3)2+2H2O |
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| 477. |
Who have remembered the whole modern periodic table?tell the truth |
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Answer» Here me friend I remember Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Oh great No i can\'t but one of my friend completed 100 elements No one can remember that fully I think . You ?? |
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| 478. |
What is renewable resource? |
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Answer» Those resources Which can be renewed or reproduced by physical , chemical or mechanical processes Those resourses which can be renewed or replenish is known as renewable resouces eg - wind Those type of resourses which can be refreshed again and again such as wind , solar energy etc All those resources which can be renewed or replenished by physical, chemical , mechanical processes can be termed as a renewable resource |
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| 479. |
Ph of milk |
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Answer» 6.8 6.8 About 6. 8 About 6.7 to 6.9 Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? |
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| 480. |
What is it Heridity |
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Answer» Transfer of traits from one generation to second generation The transmission of charaters from parents to offsprings is know as Heridity......?? Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? |
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| 481. |
I want to buy reference of biology can u suggest me reference |
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Answer» Me too At first you study your ncert book well and then you can take the reference as Lakhmir Singh and Manjit Kaur is a very good book for explaination See if you have studied ncert very well then you can study from a reference book for better practice ..Lakhmir Singh and Manjit Kaur is a very good book for explaination and has a detailed information of all topics and an ample of questions..Xam idea is also a good choice as it has all imp. Questions and also contains Ncert exemplar imp. Questions.. So, if u want for explanation then lakhmir singh and manjit kaur u can takeAnd for extra practice xam idea. But my first advice is that you study ncert very carefully and then solve the reference book. Hope it helps. Scand Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Lakhmir Singh and Manjit kour is good . |
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| 482. |
Al2O 3+2Naoh product is 2NaAlO2+H2O balance the equation |
| Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? | |
| 483. |
List the secondary sexual character in male and female |
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| 484. |
Define Ecosystem and it\'s components? (For 5mark) . |
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Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? All organisms such as plants, animals, microorganisms and human beings interact with the non-living physical surroundings in an area called as the ecosystem.There are two main components of an\xa0ecosystem\xa0which are in constant communication with each other. They are the\xa0biotic components and the abiotic components.Biotic Components of EcosystemThe living components of an ecosystem are called the biotic components. Some of these factors include plants, animals, as well as\xa0fungi\xa0and\xa0bacteria. These biotic components can be further classified, based on the energy requirement source. Producers, consumers, and decomposers are the three broad categories of biotic components.\tProducers\xa0are the plants in the ecosystem, which can generate their own energy requirement through photosynthesis, in the presence of\xa0sunlight\xa0and chlorophyll. All other living beings are dependent on plants for their energy requirement of food as well as\xa0oxygen.\tConsumers\xa0include herbivores, carnivores, and omnivores. The herbivores are the\xa0living organisms\xa0that feed on plants. Carnivores eat other living organisms. Omnivores are animals that can eat both\xa0plant and animal tissue.\tDecomposers\xa0are the fungi and bacteria, which are the saprophytes. They feed on the decaying organic matter and convert this matter into\xa0nitrogen\xa0and\xa0carbon dioxide. The saprophytes play a vital role in recycling the\xa0nutrients\xa0so that the producers i.e. plants can use them once again.Abiotic Components of EcosystemAbiotic components are the physical and/or the chemical factors that act on the living organisms at any part of their life. These are also called as the ecological factors. The physical and chemical factors are characteristic of the\xa0environment. Light, air, soil, and nutrients, etc. form the abiotic components of an ecosystem.The abiotic factors vary from ecosystem to ecosystem. In an\xa0aquatic\xa0ecosystem, the abiotic factors may include water pH,\xa0sunlight, turbidity, water depth, salinity, available nutrients and dissolved\xa0oxygen. Similarly, abiotic factors in terrestrial ecosystems can include soil,\xa0soil types,\xa0temperature,\xa0rain, altitude,\xa0wind, nutrients, sunlight etc. Any body please? answer |
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| 485. |
If angle of incedence is 90degree then what is the angle of refraction |
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Answer» 90 degrees becoz i=r 90 The answer is 90 degreeBecause i=r If it is giving you irritation then please add to your question that "don\'t reply with betternation.xyz " Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? |
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| 486. |
Is CA(OH) 2 IS WEAK BASE OR STRONG BASE???? |
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Answer» Strong base Strong base Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Calcium\xa0hydroxide,\xa0Ca(OH)2, is a\xa0strong base. It dissociates completely into\xa0Ca2+\xa0and\xa0OH-\xa0ions in aqueous solution. It is, however, sparingly soluble in water.\xa0Ca(OH)2\xa0is a\xa0strong base\xa0but not very soluble. |
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| 487. |
How acids react with metal oxides?(2)explain with reaction\xa0* |
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Answer» Acid +metal oxides=salt +water Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? When acid reacts with metal oxide to form salt and water.Example-1. CopperII to oxide is a metal oxide. Dilute hydrochloric acid with copper to oxide to give copper to chloride and waterCup + HCl (dil.) -- Cucl2 + H2O 2. When sodium oxide reacts with dilute hydrochloric acid to form sodium chloride +waterNa20 +HCl (dil.) --Na2cl + H20 |
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| 488. |
What is SI. unit of electricity |
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Answer» Ampere Ampere Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Ampere Electric power is the rate at which work is done or energy is transformed into an electrical circuit. It is represented by P.The formula for electric power isP = VI = VQ/tP = PowerV i= Potential difference in the circuitI = Electric currentQ = Electric charge in coulombst = Time in secondsThe SI unit of electric power is Watt or joule per second. |
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| 489. |
How to balance a chemical equation? |
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Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? A balanced chemical equation is that in which the total number of atom of each elements are equal on both side of the equation. The balancing of a chemical equationis based on law of conservation of mass. Total number of atoms on both sides is known as balance equation A balanced chemical equation is that in which the total number of atom of each elements are equal on both side of the equation. The balancing of a chemical equationis based on law of conservation of mass. |
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| 490. |
What are the effect of corrosion? |
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Answer» 1. It make the metal weak and easily broken into pieces by our external force2. It converse the metal into undesirable compound by interaction with moist air and presence of oxygen Damage to car bodies,bridges,iron railings, ships.And all the objects made of metals,specially those of iron.Hope! this is helpful for you Corrosion causes plant shutdowns, waste of valuable resources, loss or contamination of product, reduction in efficiency, costly maintenance and expensive overdesign. Hope this answer helps you ? ? Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Can any one plz give my question\'s answer?? |
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| 491. |
What are the method to prevent rancidity??? |
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Answer» By Using Antioxidants or keeping food in air tight containers Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? The Methods to prevent rancidity:1) Replacing gas by nitrogen2) By adding anti-oxidants3) Keeping food in air tight containers |
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| 492. |
Tell 5 formulas for power.(in electric ch) |
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Answer» P=W/tP=VIP=I^2 *RP=V^2 /RP=V*Q/t Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? P=VI V=P/I I=P/V Sorry but I know only 3 formulas for power ?.... |
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| 493. |
Which reference book is best for grade 10th (s. chand, osswal ya phir exam idea) |
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Answer» "# For science "#See if you have studied ncert very well then you can study from a reference book for better practice .. Lakhmir Singh and Manjit Kaur is a very good book for explaination and has a detailed information of all topics and an ample of questions.. Xam idea is also a good choice as it has all imp. Questions and also contains Ncert exemplar imp. Questions.. Oswal question bank is too a good choice..it also contains ample of questions So, if u want for explanation then lakhmir singh and manjit kaur u can take And for extra practice xam idea or oswal. But my first advice is that you study ncert very carefully and then solve the reference book. Hope it helps. Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? Schand and osswal both Educart is the best for 2021 board exam exam idea |
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| 494. |
What is respiratoin |
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Answer» Process of breakdown of (oxidation)food to release energy is called respiration. Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? The process of breakdown of complex molecules to simple molecules to release energy is called respiration. |
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| 495. |
What are sign convensions of mirror |
| Answer» Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? | |
| 496. |
Explain the functioning of heart |
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Answer» The heart functions in the following ways:●The arteries receive oxygenated blood from the heart and supply it throughout the body. Whereas, the veins carry the deoxygenated blood from all the body parts to the heart for oxygenation.●The right atrium receives blood from the veins and pumps it to the right ventricle.●The right ventricle pumps the blood received from the right atrium to the lungs.●The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle.●The left ventricle pumps the oxygenated blood throughout the body.☆Improper functioning of the heart results in\xa0heart diseases\xa0such as angina pectoris, congestive heart failure, cardiomyopathy, cardiac arrest, etc. HOPE IT HELPS YOU?✌ Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? |
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| 497. |
What is the function of blood capilarries |
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Answer» It helps in the supply of blood CAPILLARIES: On reaching tissues, arteries branch further into extremely thin tubes called capillaries. "Capillaries bring about the exchange of substances between blood and tissues". HOPE IT HELPS YOU?✌ Join betternation.xyz This is a site where u can have a lot of friends and fun ? ? ? |
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| 498. |
Why variations take place in DNA copying?? |
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Answer» What is corrosion? Join betternation. xyz This is a site where u can have a lot of friends and fun ? ? 7054284481 |
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| 499. |
Full form of IPSFC |
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Answer» International Pacific Salmon Fisheries Commission. Join betternation. xyz This is a site where u can have a lot of friends and fun ? ? |
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| 500. |
List 7 pair of characters studied by Mendel. |
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Answer» 1) STEM HEIGHT: Tall & Dwarf. 2) FLOWER COLOUR: Violet & White. 3) FLOWER POSITION: Axial & Terminal. 4) POD SHAPE: Inflated & Constricted. 5) POD COLOUR: Green & Yellow. 6) SEED SHAPE: Round & Wrinkled. 7) SEED COLOUR: Yellow & Green. HOPE IT HELPS YOU?✌ Join betternation. xyz This is a site where u can have a lot of friends and fun ? ? There were 7 characters of the pea plant which were selected by Mendel for the experiments. The characters\xa0which were chosen by Mendel for his study were stem height, flower colour, flower position, pod shape, pod colour, seed shape, seed colour. All these characters belong to different chromosomes in the pea plant. |
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