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InterviewSolution
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.
| 851. |
What are pothosintesis |
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Answer» A process in which plants takes carbon dioxide and sunlight from the atmosphere and minerals and water from root to make there own food for their growth is known as photosynthesis ❤?❤?❤Høpə iť mæý həłp ýœů ❤?❤?❤ The process by which the plants makes their own food by the help of sunlight, water and chlorophyll and in the presence of oxygen and carbon dioxide. Photosynthesis is the process of plants for making their own food with the help of sunlight, water and chlorophyll. It is photosynthesis |
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| 852. |
Please explain how to balance equation |
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Answer» How to balance a chemical equationWe take the reaction of formation of water.H2\xa0+ O2\xa0-->\xa0H2O\xa0(unbalanced equation for formation of water)This equation can be balanced by using certain steps as mentioned below.Step I: list the number of atoms of each element present on both sides of arrow.\t\xa0ReactantProductH22O21\t\xa0Step II: Begin balancing with the compound having maximum number of atoms. Following this rule we select H2O. Here there are 2 oxygen atoms on the reactant side but only 1 oxygen atom on the product side. So equation is unbalanced. In order to balance we need to do following step.\t\xa0ReactantProductInitial oxygen atom21To balance21 X 2\tSo the equation stands out to beH2\xa0+ O2\xa0\xa0--> 2H2O\xa0Step III: After balancing oxygen the equation is H2\xa0+ O2\xa0à 2H2O. So now we need to balance hydrogen atom.\t\xa0ReactantProductInitial hydrogen atom24To balance2 X 24\t\xa0So the final equation stands out to be2H2\xa0+ O2\xa0--> 2H2O U can use trial and error method |
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| 853. |
Fe2O3+2Al=Al2O3+2Fe |
| Answer» This reaction is an example of a displacement reaction.Here\xa0Aluminum is more reactive metal than Fe. Therefore Al will displace Fe from its oxide. This type of chemical reactions in which one of the element displace another is called as\xa0displacement reaction. Here less reactive metal is displaced by more reactive metal. Since one-time displacement is occurring, therefore, it is called as single displacement reaction.Displacement reaction is\xa0applicable in both non-metals and metals. | |
| 854. |
Why red blood cell having curved surface |
| Answer» To maximize surface area | |
| 855. |
Life process important key points |
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Answer» It\'s is in this app itself. Go to revision notes of this lesson. Ingestion RespirationDigestionEgestionExcretion Are itne lambe chapter ke key points yaha par likhenge to adha din nikal jayega |
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| 856. |
What is the need of two systems for control and coordination? |
| Answer» Nervous system and endocrine system are responsible for control and coordination of complex, multicellular human body with multiple organ systems of complex functioning. Endocrine secretions (hormones) regulate proper growth and development and functioning of different organs. Nervous system enables us to respond to our surroundings and to perform daily activities. It does so by sensing external and internal stimuli followed by a relay of sensory information to CNS (Central Nervous System) for processing and generation of motor output, i.e., involuntary and voluntary actions. | |
| 857. |
Prepare a note on biomagnification. |
| Answer» biomagnification is the increase in concentration of the persistant toxicant at successive trophic levels. It happens because a toxic substance accumulated by an organism cannot be metabolised or excreted and is thus passed onto the next higher trophic level. | |
| 858. |
Name two non-metals which are commonly available and name their two important properties |
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Answer» Thank you Nitrogen and carbon Nitrogen and carbonNitrogen :- it insert in nature Carbon :- it is allotropes Nitrogen can be\xa0used\xa0as food preservative and in bulbs because of\xa0its\xa0inert nature.Carbon has various allotropes like amorphous carbon, diamond and graphite just to\xa0mention\xa0a few. |
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| 859. |
Dilution of acid |
| Answer» Add acid to water ?. Don\'t add water ? to acid | |
| 860. |
Can we have the answers of all the ques papers.? |
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| 861. |
Why are decomposition reaction called the opposite of combination reaction? Write equation for these |
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Answer» In a decomposition reaction , a single substance break down into two or more substance while in a combination reaction , two or more substance react to produce one substance . Therefore , decomposition reaction are called opposite of combination reactions.Example of decomposition reaction - NH4Cl --> HCl + NH3Example of combination reaction - CaO + Co2 --> CaCO3 In a combination reaction two or more substances are combined to form new substance while in the decomposition reaction one substance decomposes into two or more substances. Hence, the decomposition reactions are called opposite of combination reactions.Decomposition reaction\xa0CaCO3\xa0(s) ⇨ CaO (s) + CO2\xa0(g)Combination reaction\xa0H2\xa0(g) + Cl2\xa0⇨ 2HCl (g) |
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| 862. |
How chemical reaction can be classified on the basis of chemical reaction |
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Answer» Chemical reactions can be classified in following types:\tCombination Reaction\tDecomposition Reaction\tDisplacement Reaction\tDouble Displacement Reaction\tOxidation and Reduction Reaction The basis for different types of reactions is the product formed, the changes that occur, the reactants involved and so on. Different types of reactions are\tCombustion reaction\tDecomposition reaction\tNeutralization reaction\tRedox Reaction\tPrecipitation or\xa0Double-Displacement Reaction\tSynthesis reaction |
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| 863. |
Describe the structure and functioning of nephron? |
| Answer» Structure of a Nephrons:\tNephrons are the basic filtering units of kidneys.\tEach kidney possesses large number of nephrons, approximately 1-1.5 million.\tThe main components of the nephron are glomerulus, Bowman’s capsule, and a long renal tubule.Functioning of a Nephron:\tThe blood enters the kidney through the renal artery, which branches into many capillaries associated with glomerulus.\tThe water and solute are transferred to the nephron at Bowman’s capsule.\tIn the proximal tubule, some substances such as amino acids, glucose, and salts are selectively reabsorbed and unwanted molecules are added in the urine.\tThe filtrate then moves down into the loop of Henle, where more water is absorbed.\tFrom here, the filtrate moves upwards into the distal tubule and finally to the collecting duct. Collecting duct collects urine from many nephrons.\tThe urine formed in each kidney enters a long tube called ureter. From ureter, it gets transported to the urinary bladder and then into the urethra. | |
| 864. |
Posan kya he |
| Answer» | |
| 865. |
What are stomata?Mention its functions. |
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Answer» When a leaf is examined under the microscope, we observe many tiny pores, which are collectively called stomata.Functions of StomataThe major function of stomata is the exchange of gases by taking carbon dioxide from the atmosphere and giving out oxygen that is used by human beings and animals. They help in photosynthesis and transpiration. Stomata are the small pores present mostly in the leaves as well as in the soft and hairy stems . The function of stomata is to exchange the gases. These are surrounded by two gaurd cells,as when required these opens to absorb gases and release gases. |
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| 866. |
Can we call oxygenated blood as O2 blood and deoxygenated as CO2 blood? |
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Answer» Ys Obviously yes Yah!! Yes Yes |
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| 867. |
What is nephron.. |
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Answer» It is a basic filtration unit of kidney ?read ch 6life processes u will know automatically |
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| 868. |
Difference between alloying and galvanization ? On the basis of your understanding. |
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Answer» The process of coating a layer of alloy on an iron article is called alloying.On th other hand the process of coating a layer of zinc on an iron article is called galvanization.They both are done to protect the article from corrosion or rusting A thin layer of zinc metal deposit on iron is known as galvanization. Science |
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| 869. |
Do sun have a life span? If yes explain. |
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Answer» Sun\xa0has a lifespan, characterized by a formation, main sequence, and eventual death. This\xa0lifespan began roughly 4.8 billion years ago, and will\xa0continue for about another 4 – 5 billion years, when it\xa0will deplete its supply\xa0of\xa0hydrogen, helium, and collapse into a white dwarf. Existing for about 4 and a half billion years, it has burnt up about half of the hydrogen in its core. This leaves the Sun\'s life expectancy to 5 billion more years, at which time, the Sun\'s elements will "swell" up, swallow Earth, and eventually die off into a small white dwarf. No sun doesn\'t have an lifespan becoz it\'s not a living,nonliving thing which will expire it is a form of energy which can\'t expire |
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| 870. |
What is the importance of natural resources? Why is it necessary to conserve them |
| Answer» 1) Resources are important for any development activity.2) everything available are directly or indirectly obtained from natural resources.Necessary to conserve resources because:1) Their irrational consumption and over utilisation led to socioeconomic and environment al problems.2) It takes millon of years for the formation of natural resources.3) Natural resources are fixed in quantity and they are non renewable.?? | |
| 871. |
Rain water conduct electricity but distilled water do not conduct electricity. Why? |
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Answer» Rainwater has the capacity to conduct electricity as it dissociate into ions when electricity is passed through it. Thus distilled water ?does not conduct electricity. The availability of ions is very important to conduct electricity. Distilled water is a pure type of water which does not contain any ions in it. Whereas rainwater contains dissolved gasses such as SO2, CO2. These gases dissolve in water to form some kind of acids like carbonic acids which dissociates to give ions. Thus rainwater is conducting electricity while distilled water is not conducting electricity. |
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| 872. |
Although co2 and NH3 do not have H and OH but still they act as acid and base . Why?? |
| Answer» 1.Co2 is base because it is oxide of non-metal and non metallic oxide are acidic in nature.2.NH3 is base because its nitrogen atom has an electron pair that readily accept proton.When we mix CO2 and NH3 in water,we get carbonic acid and ammonium hydroxide. | |
| 873. |
How to draw V-I graph, and I-V graph? |
| Answer» Both the IV and VI graph shows the relation between potential V, and current I.In VI graph, we take potential at y-axis and current at x-axis.The slope of VI graph give us the resistance.In IV graph, Current is at y-axis and potential is at x-axis.The reciprocal of the slope of IV graph shows the resistance. | |
| 874. |
What is a heart |
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Answer» The heart is a body organ that pumps oxygenated and deoxygenated blood. It is made up of cardiac muscles. A heart is an organ that helps in pumping of oxygenated and deoxygenated blood. Heart is an organ, whose function is to pump blood to body. heart circulates blood through out the body |
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| 875. |
What is ahart |
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Answer» Heart is an organ of our body whose function is pumping of the blood into our body. It consists 4 chamber heart .Right atrium ,right ventricle, left atrium and left ventricle . Heart is an organ whose function is to pump blood to body. |
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| 876. |
What is mensturation(please give answer in simple language) |
| Answer» \tMenstruation\xa0is\xa0the\xa0cyclic\xa0process\xa0in\xa0female\xa0of\xa0age\xa0from\xa012\xa0-\xa045\xa0.\tIn\xa0this\xa0process\xa0Overy\xa0releases\xa0mature\xa0egg\xa0in\xa0each\xa028\xa0days.\tIf\xa0fertilization\xa0does\xa0not\xa0take\xa0place\xa0then\xa0the\xa0blood\xa0vessels\xa0along\xa0with\xa0egg\xa0comes\xa0out\xa0of\xa0the\xa0******\xa0,\xa0this\xa0flow\xa0is\xa0know\xa0as\xa0menstrual\xa0flow\xa0or\xa0simply\xa0menstruation.\tIn\xa0general\xa0language\xa0menstruation\xa0is\xa0also\xa0known\xa0as\xa0period. | |
| 877. |
What is phloem loading and unloading??? |
| Answer» When the movement of minerals and water via xylem is driven mostly by negative pressure and movement via phloem is driven by hydrostatic pressure. This process is called as translocation and accompanied by a process known as phloem loading and unloading.\xa0 | |
| 878. |
Explain the importance of parent selection in his experiment |
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| 879. |
What is meant by respiration |
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Answer» Respiration is the process by which food is broken down into simpler form to release energy Breathing.A process by which living things produce energy from food.( Respiration usually needs oxygen) Respiration is a process where the body uses the oxygen to break down glucose and release energy, so that the cells in the body can use it. Carbon dioxide and water are produced during respiration. |
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| 880. |
Steps for a starch test on a leaf |
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Answer» Steps to test the presence of starch in leaves :Step 1: A fresh leaf is taken.Step 2: The leaf is boiled in water for few minutes to soften the cells in the leaf.Step 3: Now, dip this leaf in iodine solution.Step 4: The color of the leaf will changes into blue black color when iodine is added to it which shows the presence of starch in it. sry in point 5 leaf is colurless rather than greeen 1 firstly remove chlorophyll from leave by adding a leaf into a beaker containing alcohal2 then heat this beaker3 after heating for 2 min remove the leaf from beaker4 put iodine solution on leaf5 if leave change green colour to blue black then starch is presentif not then starch is not present |
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| 881. |
Define eye structure with diagram. |
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Answer» \xa0\tMain partsFunctionsCorneaLight enters the eyes through cornea.IrisIt controls the amount of light entering the eyes.PupilIt dilates and contracts and thus enables us to in bright and dark light.Eye-lensIt is a convex lens and focuses the light entering the eyes.Ciliary musclesHolds the eye lens and helps it to change its focal length.RetinaPart of the eyes where image is formedOptic nerveIt helps to carry the signals from the retina to the brain.\t \tMain partsFunctionsCorneaLight enters the eyes through cornea.IrisIt controls the amount of light entering the eyes.PupilIt dilates and contracts and thus enables us to in bright and dark light.Eye-lensIt is a convex lens and focuses the light entering the eyes.Ciliary musclesHolds the eye lens and helps it to change its focal length.RetinaPart of the eyes where image is formedOptic nerveIt helps to carry the signals from the retina to the brain.\t\xa0 sry anupama |
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| 882. |
hlo everyone i am new here |
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Answer» Ok why u r not responding |
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| 883. |
Explain 10% law of ecosystem. |
| Answer» \xa0As we pass from one trophic level to the next, only 10% of energy is transferred from the first trophic level to the next. This is because a lot of energy is lost to the surroundings and rest is utilised by the organism.We can understand this better using an example.When green plants are eaten by primary consumers, lot of energy is lost as heat to the environment. Some energy is used by the consumer into doing work and digestion whereas rest is used for growth and reproduction. About 10% of the eaten food is turned into its body and made available to the next level of consumers. So the actual energy passing to the next trophic level is only 10%.\xa0Grass -> Grasshopper -> Frog -> snake -> hawkHere, a part of the solar energy is captured by grass which uses it to produce food. About 10% of this captured energy is passed on to grasshoppers. Here, large amount of energy is lost as heat, some goes into digestion and doing work and rest towards growth. Again 10% of the food eaten by the grasshopper is made available to the next trophic level, comprising\xa0of frogs. In this way energy flows further from frog to snake and from snakes to the final trophic level, made up of hawks..Another example would beDead organic matter -> Microrganisms like bacteria, fungi etc. -> Detritivores like earthworms, nematodes etc. -> Predators like snakes, frogs e | |
| 884. |
What is the importance of variation in organisms??? |
| Answer» \tVariation can be defined as the difference between the cells, organisms or group of organisms belonging to a particular species by environmental factors (phenotypic variation) or genetic differences (genotypic variations).\tIt is caused by gene mutations due to certain environmental factors and various combinations of genetic material.\xa0\tVariation is important because it causes evolution and is the basis of heredity.\tIt is advantageous to a population as it enables few individuals to adapt to the environment changes thus, enabling the survival of the population. | |
| 885. |
Give previous years paper of ch1.Chemical equation and reaction. |
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Answer» I knem it but in this app we have to purchase then by going into science content u get this papers on this app??? |
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| 886. |
why exchange of gases occur only in alvelor system and not in other parts |
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Answer» thanks o lot Each alveolus is made up of highly-permeable and thin layers of squamous epithelial cells. Similarly, the blood capillaries have layers of squamous epithelial cells. Oxygen-rich air enters the body through the nose and reaches the alveoli. The deoxygenated (carbon dioxide-rich) blood from the body is brought to the heart by the veins. The heart pumps it to the lungs for oxygenation. The exchange of O2 and CO2 takes place between the blood capillaries surrounding the alveoli and the gases present in the alveoli.Thus, the alveoli are the sites for gaseous exchange. The exchange of gases takes place by simple diffusion because of pressure or concentration differences. The barrier between the alveoli and the capillaries is thin and the diffusion of gases takes place from higher partial pressure to lower partial pressure. The venous blood that reaches the alveoli has lower partial pressure of O2 and higher partial pressure of CO2 as compared to alveolar air. Hence, oxygen diffuses into blood. Simultaneously, carbon dioxide diffuses out of blood and into the alveoli. |
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| 887. |
How STDs happens in human?give five point . |
| Answer» \tThe diseases which are spread by sexual contact with an infected person are called Sexually Transmitted Diseases.\xa0Some of the common sexually transmitted diseases are Gonorrhoea, Syphilis and AIDS.\tSexually transmitted\xa0diseases (STDs) — or\xa0sexually transmitted\xa0infections (STIs) — are generally acquired by sexual contact. The organisms (bacteria, viruses or parasites) that\xa0cause sexually transmitted\xa0diseases may pass from person to person in blood, semen, or vaginal and other bodily fluids. | |
| 888. |
Properties of magnet |
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Answer» Following are the basic properties of magnet:\tWhen a magnet is dipped in iron filings, we can observe that the iron filings cling to the end of the magnet as the attraction is maximum at the ends of the magnet. These ends are known as\xa0poles of the magnets.\tMagnetic poles always exist in pairs.\tWhenever a magnet is suspended freely in mid-air, it always points towards north-south direction. Pole pointing towards geographic north is known as the North Pole and the pole pointing towards geographic south is known as the South Pole.\tLike poles repel while unlike poles attract.\tThe magnetic force between the two magnets is greater when the distance between these magnets are lesser. * Magnets are of various shape.* Magnets have a north pole and a south Pole.* Magnet produces a magnetic field lines around it.* Magnet exerts two forces:-1. Force of attraction.2.force of repulsion.* Magnets are used in various devices.* It is also used in compass to show the direction. |
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| 889. |
Which lens is called converging lens |
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Answer» Convex lens is called converging lens because it converges the ray of light when it refracted from the lens (Convex basically). Convex lens?? Convex lens Convex lens Convex lens |
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| 890. |
What is phloem loading and phloem unloading? |
| Answer» Translocation of organic solutes such as sucrose (i.e., photosynthetic) takes place through sieve tube elements of phloem from supply end (or source) to consumption end (or sink). But, before this translocation of sugars could proceed, the soluble sugars must be transferred from mesophyll cells to sieve tube elements of the respective leaves.This transfer of sugars (photosynthetic) from mesophyll cells to sieve tube elements in the leaf is called as phloem loading. On the other hand, the transfer of sugars (photosynthetic) from sieve tube elements to the receiver cells of consumption end (i.e., sink or\xadgans) is called as phloem unloading. Both are energy requiring processes. | |
| 891. |
What is micturition? |
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Answer» Micturition is the release of urine from urinary bladder through urethra. It is also termed as ‘Urination’. This occurs involuntarily in children upto 4-5 years; thereafter regulated voluntarily. Thuuuuuu....... |
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| 892. |
At which place nephrons are located in kidney? |
| Answer» Cortex | |
| 893. |
What is the colour of lymph? |
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Answer» No it is definitely of yellowish colour. 100 ?% It is colourless? yellowish colour |
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| 894. |
If a person is suffering from myopia and Hypermetropia which type of lens is used to correct it??? |
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Answer» Myopia - correction lens is concave and hypermetropia - correction lens is convex. In myopia cancave lens used for correctionIn Hypermetropia canvex lens used for correctionIn case of both problem bi-focal lens reguired |
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| 895. |
What is double circulation??? |
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Answer» In double circulation process, blood passes through the heart twice a time. When the blood passes through the heart twice, its6 called double circulation |
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| 896. |
Write the reaction of metal with acid and give examples |
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Answer» Zn +hcl = zncl2 + h2 Metal + acid = salt +h2 |
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| 897. |
Nurons |
| Answer» The brain, spinal cord and nerves are all composed of the nervous tissue. The cells of this tissue are called nerve cells or neurons.The neuron consists of 3 parts:\tThe Cyton or Cell body - It contains a central nucleus and cytoplasm with deeply stained particles called Nissl’s granules.\tDendrites - The dendrons are short processes arising from the cyton and branches into dendrites. \tAxon - It is a single, long cylindrical process which forms fine branches terminally. It has a swollen structure at its end called synaptic knob or bouton. It is also termed as the nerve fibre. | |
| 898. |
How we can identify from the question which ray diagram is? |
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| 899. |
Absorption of light energy by |
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Answer» Differentiate unisexual and bisexual with example Absorption of light energy by chlorophyll. Chlorophyll |
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| 900. |
Write an experiment to trace the path of prism |
| Answer» Procedure\tFix a white sheet on a drawing board using drawing pins.\tPlace the triangular prism resting on its triangular base. Using a pencil, draw the outline of the prism.\tDraw NEN normal to the face of the prism AB. make an angle between 30°\xa0and 60°.\tOn the line PE, fix two pins at a distance of 5cm from each other and mark these as P and Q.\tLook for the images of the pins at P and Q through the other face of the prism AC.\tFix two pins at R and S such that they appear as a straight line as that of the P and Q when it is viewed from AC face of the prism.\tRemove the pins and the prism.\tAt point F, make the points R and S meet by extending them.\tPQE is the incident ray which is extended till it meets face AC. SRF is the emergent ray which is extended backward to meet at point G.\tNow mark the angle of incidence ∠i, angle of refraction ∠r and the angle of emergence ∠e and ∠D as shown in the experimental setup.\tRepeat the experiment for more angles between 30°\xa0and 60°.Observations\tAt surface AB, the light ray enters and bends towards the normal on refraction.\tAt surface AC, the light ray bends away from the normal as it travels from one medium (glass) to the other (air).\tThe angle of deviation is observed. Here, the emergent ray bends at an angle towards the direction of the incident ray.Conclusion\tThe incident ray bends towards the normal when it enters the prism and while leaving the prism it bends away from the normal.\tWith the increase in the angle of incidence, the angle of deviation decreases. After attaining the minimum value, it increases with an increase in the angle of incidence. | |