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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.
| 7351. |
Sciece questions answer |
| Answer» Check NCERT Solutions here :\xa0https://mycbseguide.com/ncert-solutions.html | |
| 7352. |
What is the significance of melting point and boiling point |
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Answer» Melting points are important because they indicate compound purity. If you synthesize a compound and measure its melting point and the melting point is well-defined (i.e., the compounds melts over a very small temperature range) and the temperature agrees with values reported in the literature (if those are available), then it is a strong piece of evidence that the sample is relatively pure. Boiling points are important for the same reason, a well-defined boiling point indicates purity. Boling point 100 degree clelisoiusMelting point 0 degree clesious |
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| 7353. |
What is Newton\'s second law |
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Answer» Newton\'s Second Law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force.\xa0ie., F=maWhere F is the force applied, m is the mass of the body, and a, the acceleration produced. The second law of newton - a=0m/s*s |
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| 7354. |
State the function of chromosone in a cell |
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Answer» 1. Guiding the cell in cell division\xa02. Plays an important role in inheritance of characters from generation to generation\xa03. Guiding protein synthesis\xa04. Performing carbohydrate, protein and lipid metabolism\xa0 The function of the chromosome in a cell is to ensure that the DNA remains tightly wrapped around the proteins |
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| 7355. |
Three type if interia |
| Answer» Inertia of rest Inertia of motionInertia of direction | |
| 7356. |
Difference between homogeneous and heterogenous |
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Answer» Homogenous does not have definite boundaries will heterogeneous has definite boundaries A mixture which has uniform composition throughout such mixture are called homogenous mixture . a mixture which has non uniform composition such mixture are called heterogenous mixture |
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| 7357. |
What is a metamorphosis |
| Answer» In case of indirect development, transformation of young ones into adult is called metamorphosis. Larva of butterfly undergoes metamorphosis to become a butterfly. A tadpole undergoes metamorphosis to become a frog. | |
| 7358. |
Difference between micronutrient and macronutrient |
| Answer» There are 16 essential elements, out of which carbon and oxygen are obtained from air, hydrogen from water and remaining 13 elements are supplied by soil. These essential elements are divided into two categories: macronutrients and micronutrients. Amongst the thirteen nutrients, six are required in large quantities and are therefore called macro-nutrients. The other seven nutrients are used by plants in small quantities and are therefore called micro-nutrients. | |
| 7359. |
what is meant by meiosis in simple words? |
| Answer» 1.It helps in formation of gamete(sperm or ovum)2.New cells consiats of half of the chrosomes | |
| 7360. |
What is properties of matter? |
| Answer» Following r the properties of matter :-*particles of matter have space between them.*Matter is made up of particles. *particles of matter attract each other. *particles of matter are continuaslly moving. | |
| 7361. |
What is crystallizatio and write its application |
| Answer» It is process by which pure substances can be seperated from impure particles | |
| 7362. |
Can i have last 5 years SA1 Science question papers. |
| Answer» | |
| 7363. |
What happens when swallen rasins kept in water give reason |
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Answer» It will shrink When raisins are kept in water, the water from surrounding diffuses into raisins and the rains swell up. The process of absorption of water by raisins and swelling up is called osmosis. ??? It comes back into its original size.it is an isotonic |
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| 7364. |
Differentiate between physical and chemical changes |
| Answer» \t\xa0Physical Changes\xa0Chemical Change1.It is not permanent and can easily be reversed.1.It is permanent and cannot be easily reversed.2.It does not lead to formation of new substances.2.It leads to the formation of new substances.3.No change in mass is noticed.3.There is a change in mass of reactants and products.4.The energy changes observed are small.5.Large energy changes are observed.\t | |
| 7365. |
What is solvent? |
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Answer» Solvent is in a liquid which makes dissolve the solvent The liquid in which the solute is dissolved Solvent is a solution which can dissolve solutes solvent are substances which is higher in amount in solution Solute substance |
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| 7366. |
When do we say that a cell is living or dead ? |
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Answer» Hey when the cytoplasm of the cell is dried up then it is dead and if it is present and performing its living function it is said to be alive We say cell is living because it performs function when it will be damaged it can\'t do function so we at this time it is dead When it |
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| 7367. |
Define latent heat of fusion? |
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Answer» Latent heat of fusion is the amount of heat energy that is required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point, i.e. without changing its state. The heat required to change 1 kilogram of solid into liquid at atmospheric pressure is called latent heat of fusion |
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| 7368. |
Why does the nail grow rather it is made up of dead cells |
| Answer» Because in the nail surrounding areas the blood circulation will not move so thr nail grows rather than it is dead cells? | |
| 7369. |
What are the functions of protective tissue |
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Answer» The protective tissue or the outermost covering of cells in plants is known as epidermis, which performs protective function (protecting plants from adverse conditions). It is usually made up of a single layer of cells. In dry habitats, epidermis gets thicker to protect the plant from undue loss of water.\xa0On aerial parts of plant, epidermal cells often secrete a waxy, water-resistant layer on their outer surface. This waxy covering aids in protecting the plant against loss of water, mechanical injury and invasion by parasitic fungi. The cells of epidermal tissue are present in a continuous layer without intercellular spaces.Small pores are present on the epidermis of leaf. These pores are called stomata. They are enclosed by two kidney-shaped cells called guard cells. They help in gaseous exchange and transpiration.As plant grows older, a strip of secondary meristem replaces the epidermis of stem. This forms a several layer thick cork or bark of the tree in which cells are dead and compactly arranged without intercellular spaces. To protect cell from insects , infections,in high summer etc |
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| 7370. |
Who discovered the cell and when? |
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Answer» Robert hooke discovered cell from the cork in 1665 robert hooke discovered cell in 1665 Robert hook discovered cell in 1946 |
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| 7371. |
What is the difference between atoms and elements? |
| Answer» \tAtomsElementsThe smallest part of an element.A Basic substance that can be simplified.Made of electrons, protons and neutrons.Made from one type of atom.Contain only one nucleus with numerous electrons, protons and neutrons.Atoms have the same numbers of protons.They combine to form molecules.They combine to form chemical compounds.\t | |
| 7372. |
What is cloroplast and cromoplast?? |
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Answer» \xa0Chloroplasts:1) They contain mainly chlorophylls and some amount of carotene and xanthophyll.2) They are present in the mesophyll of leaves.3) Their main role is to prepare food by the process of photosynthesis.Chromoplasts:1) They contain mainly carotene and xanthophyll.2) They are present in the petals of flowers, skin of fruits, etc.3) They don’t play any role in photosynthesis; their main role is to impart colouration to plants. Chloropast is coloured plastids having their own genetic material and have deeply folded membrane Cromoplast are the part of chloroplasts providing green colour to leaf |
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| 7373. |
What is latent heat of vapourasation and layent heat of fusion? |
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Answer» Latent heat of fusion of a solid is the quantity of heat in joules to convert 1 kilogram of the solid to liquid without any change in temprature The Latent Heat of Fusion is define as the amount of heat required to change a unit mass from solid to liquid at a constant temperature. In general, it is the heat required to melt the substance from solid or the amount of heat to be removed from a unit substance to freeze it from liquid to solid.Latent Heat of Vapourisation is defined as the amount of heat required to change the unit mass of liquid at boiling point into vapour under constant temperature. In general, it is the heat required to vaporise a liquid or the amount of heat to be removed from gases to condense it into a liquid. |
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| 7374. |
Explain how motion is relative in nature? |
| Answer» | |
| 7375. |
What is an iron almirah |
| Answer» It is a place where we keep things it is a solid | |
| 7376. |
What will happen if iron and sulphur will mix together in a beaker |
| Answer» It will form FeSo4(ferroussulphate) | |
| 7377. |
What is the state of water at 0 degree celcius and why? |
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Answer» Solid State Solid state of water are starting 0 degree is neither melting nor freezing point of water The state of water at 0 degree is both solid and liquid because 0 degree is neither melting point of ice nor freezing point of water. |
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| 7378. |
explain three laws of motion |
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Answer» There will be an equal and opposite reaction for the action Newton\'s third law=for every action there is a equal and opposite reaction Newton\'s second law=the net force acting on a body is zero then the acceleration remains unchanged Newton\'s first law=everybody continues to be in the state of rest or uniform motion in a straight line unless it is compelled by the external force |
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| 7379. |
What is newton 1st law |
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Answer» Law of inertia Any object can not change it\'s position or direction,until any force is applied on it According to the Newton\'s first law, "an object in rest will continue to be in rest and an object in motin will continue to be in motin unless no external force is applied" . Law of inertia About inertia |
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| 7380. |
How do substances like Carbon dioxide and water move in and out of the cell? |
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Answer» By the process of diffusion and osmosis GASES,,like carbondioxide__by the process of diffusion WATER__by the process of osmosis By osmosis and diffusion. Co2 by diffusion and water by osmosis Through plasma membrane By the process of osmosis which controls by the plasma membrane permeable membrane |
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| 7381. |
Say all 18 states of matter |
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Answer» 5 hi toh hote h Sorry there are still 18 states of matter in the world There are only 5 states of matter1.Solid2.Liquid3.Gas4.Plasma5.BEC(bose Einstein condense) Bhai 6 e state hoti hai solid liquid gas plasma becb |
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| 7382. |
What do mean by emdoplasmic reticulum |
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Answer» Endoplasmic reticulum is the cell organelle which found in higher organised organism of cytoplasm of a cell and it is present on outside surface of nucleus which help in transportation material of between nucleus and cell organelles Endoplasmic reticulum is a large network of membrane bound tubes and sheets. It looks like long tubules or round or oblong bags. The ER membrane is similar in structure to the plasma membrane. |
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| 7383. |
What is mean by latent of fusion |
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Answer» The heat require 1kg of solid into liquid is ts melting point on atmospheric pressure is called latent heat of fusion The heat requires to convert solid into liquid is called latent heat of fusion the heat required to change the state from solid to liquid without changing the temperature is known as latent heat or hidden heat Latent heat of fusion is the change of 1kg of solid into a liquid state without changing the temperture |
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| 7384. |
Difference between eukaryote and procaryote cell |
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Answer» \t\xa0ProkaryotesEukaryotesType of Cell\xa0Always unicellularUnicellular and multi-cellularCell sizeRanges in size from 0.2 μm – 2.0 μm in diameterSize ranges from 10 μm – 100 μm in diameterCell wallUsually present; chemically complex in natureWhen present, chemically simple in natureNucleusAbsentPresentRibosomesPresent. Smaller in size and spherical in shapePresent. Comparatively larger in size and linear in shapeDNA arrangementCircularLinearMitochondriaAbsent\xa0PresentCytoplasmPresent, but cell organelles absentPresent, cell organelles presentEndoplasmic reticulumAbsentPresent\t Prokaryotic size is upto 5 mm they contain 70s ribosomes and prokaryotic size is upto 100 mm containing 80s ribosomes |
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| 7385. |
why naphthalene ball diapers in contact to air |
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Answer» Because of sublimation that is the change of state of napthalene from solid to gas easily This happens because of sublimation. Napthalene ball being volatile substance gets converted from solid to liquid state faster. So, it disappears quickly in contact to air. Because naphthalene balls are sublime so they get converted directly into gas without any liquid state thus they disaappear after sometime *disappears As naphthalene ball are volatile solid they perform sublimation and changes into gaseous state |
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| 7386. |
Describe the structure of chroloplast |
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Answer» A jelly like substance between the cell wall and nucleus Chloroplasts are found in all higher plants. They are oval or biconvex\xa0shaped, cell organelles\xa0found within the mesophyll of the plant cell. The size of the chloroplasts organelle usually varies between 4-6 µm in diameter and 1-3 µm in thickness. They are double-membrane organelle with the presence of outer, inner and the thin intermembrane space present in between the two layers. There are two distinct regions present inside the chloroplasts and are called as the grana and stroma.\tGrana is made up of stacks of disc-shaped structures known as thylakoids.\xa0The\xa0grana\xa0of the chloroplast consist of chlorophyll pigments and are the functional units of chloroplasts.\tStroma is the homogenous matrix\xa0which contains grana and is similar to the cytoplasm in cells in which all the organelles are embedded. Stroma also contains various enzymes, DNA, ribosomes, and other substances. Stroma lamellae function by connecting the stacks of thylakoid sacs. |
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| 7387. |
Why do sky appear blue? |
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Answer» The molecules of air and other fine particles in the atmosphere have size smaller than the wavelength of visible light. They\xa0are more effective in the scattering light of shorter wavelengths at the blue end than light of longer wavelengths at the red end. When sunlight passes through the atmosphere, the fine particles in air scatter the blue colour more strongly than red. The scattered blue light enters our eyes. As\xa0we see the blue light from everywhere overhead, the sky appears blue. Because the reflection of sea reflect the sky Rainbow looks blue It reflects all colors except the color blue This is due to reflectioñ of sea water |
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| 7388. |
5 examples which are caused by evaporation process |
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Answer» e.g. 1. A desert cooler cools better in hot dry day. 2. Perfumes and talcs causes cooling sensation on our skin.3 The water become cold in earthen pot during summer season.4. Transpiration in plants. 1.cooling caused in mud pot or matki.2.sprinkling water on road for cooling.3.cooling cause by sweating. 4.transpiration in plants for cooling whole plant. Water vapour, |
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| 7389. |
Give three features of cardiac |
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Answer» Hiiiiii reetu It is involuntary What is motion and were use motion |
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| 7390. |
What is difference between size of the day papa we can meet |
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| 7391. |
What is the main function of Golgi apparatus? |
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Answer» Secretary Helping of endoplasmic reticulum and formation of cell wall and lysosome Main functions of the Golgi Apparatus include the storage, modification and packaging of products in vesicles and also, they are involved in the formation of lysosomes. |
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| 7392. |
Types of vacuole |
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Answer» What\'s wrong with you pragya saini Stupid girl Srajan swankar - you are dumb you are nonsense just look at you what you wrote just shame on you What\'s wrong with you Bahenchod |
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| 7393. |
What is product made in Golgi apparatus |
| Answer» Lysosome | |
| 7394. |
Summary of tissue |
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Answer» Cluster of cell Tissue->organ->organ system->body Tissue is a group of cells which have similar origin , similar structure and they perform specific functions |
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| 7395. |
Characteristics of connective tissue muscular tissue and nervous tissue |
| Answer» \tConnective tissue is the binding and supporting tissue of the animal body. Matrix forms the main bulk of this tissue. The cells are loosely spaced and less in number. The matrix may be jelly like, fluid, dense or rigid. The nature of matrix differs in concordance with the function of the particular connective tissue.\tMuscular tissues form the muscles in the body and are responsible for movement and locomotion. Muscle cells are elongated and are called muscle fibres. They are capable of contraction and relaxation.\xa0\tThe brain, spinal cord and nerves are all composed of the nervous tissue. The cells of this tissue are called nerve cells or neurons. | |
| 7396. |
If one mole of carbon atoms weighs 12 grams ,what is the mass of 1atom of carbon |
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| 7397. |
Ameoba |
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Answer» Single cell organism Amoeba is a holozoic animal Is a single cellular organism it has fingers like projection called false feet to catch food it has a large vacuole which helps in digetion and excretion |
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| 7398. |
When steam condenses to form water,heat is |
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| 7399. |
Which organel is know as power house of The cell? Why? |
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Answer» Mitochondria Mitochondria is called power house of thecell because they generate a type of cell\'s coin Mitochondria is the power house of the cell Mitochondria because it generate ATP Mitochondria Mitochondria Mitochondria is called the powerhouse of cell. They are so called because they carry out the process of aerobic respiration and generate the energy molecules (ATP or adenosine Triphosphate) for cell operation. mitocondria as it is the site of cellular respiration and genration of ATP Mitochondria |
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| 7400. |
Which tissue responsible for grow leves in the plants |
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Answer» Intercalary meristem Intercalary meristemsHope it helps u ? Intercalary meristem Intercalary meristem |
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