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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.
| 45651. |
Describe about the digestive system of human body? With structures. |
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| 45652. |
why do you think noble gases are arranged on separate group |
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Answer» Because they all are stable and inert. Because they do not have any electron to share or gain Bcoz they do not react at all.... |
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| 45653. |
What is heart? What is its function and structure. |
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Answer» Its function is to pump the blood to all the body parts. Heart is a pumping organ of our body.Human heart is consist of four chambers which are left ventricle,left auricle,right ventricleand right auricle.. |
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| 45654. |
what is ecosystem ? |
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Answer» An ecosystem is a place where biotic and abiotic organisms of various communities interact with each other. For example, a garden is an ecosystem which consists of Ponds, plants, grasslands, insects, water, soil etc. All the interacting organism in an area together with the non-living constituent of the environment form an ecosystem. ecosystem is a proccess which help in maintain our enviroment ... we help to incetease more planting plant ecosystem is the environment around us on which all living beings and animals are consider |
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| 45655. |
Is sodium acetate and sodium ethanoate same? |
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Answer» Yes because sodium acetate is common name of sodium ethanoate Sorry remove H, its CH3COONa Yes...bcoz both are CH3COOHNa... |
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| 45656. |
What ie the function of heart |
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Answer» Pumping the blood Transportation of oxygenated blood to whole body and purification of the deoxygenated blood To oxygenated.... |
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| 45657. |
On passing co2 gas through freshly prepared lime water why does it turn milky? |
| Answer» Because lime water react with co2 to form calcium carbonate caco3 which is white in colur | |
| 45658. |
Explain the process of nutrtion in amoeba |
| Answer» Amoeba -psedopodia -capture food -take in food vacuole -digetion of food by diffusion -undigested food -move out to the surface of cell and is thrown out | |
| 45659. |
How do auxin promote the growth of a tendril around a support?? |
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Answer» when tip off tendril touch support than the auxin hormone present in its steps move to that side of tip which is away from support as auxin promote growth the side away from support grows faster than the side away from support. This makes tendril curve toward supports Auxin is present in tips stem and roots and prefer to stay in shade. As light falls on stem, auxin gets concentrated on the side of stem which is away from light. Auxin promotes growth the, shady side of stem grows longer than the side facing the sun. This stem bends toward ?light |
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| 45660. |
What is aim of dispersion of light |
| Answer» Control of variability.. | |
| 45661. |
Ammonia is base but doesn\'t contain hydroxide ion ? Why? |
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Answer» When we dissolve ammonia in water it gives OH- ions... That\'s why it is considered as a base Ammonia NH3 is a weak base... Which doesn\'t have hydroxyl group in its formula but it gives OH- ions when it reacts with water Par Maine ammonia hydroxide ka nhi pucha ammonia ka pucha hai Normally, it is accepted that a strong acid give rise to a weak conjugate base and weak base give rise to strong conjugate acid. when ammonia is dissolved in water it forms ammonium hydroxide. Ammonium hydroxide has the tendency to lose hydroxyl ion and hence act as a base. |
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| 45662. |
Six specific characterstick of sexual reproduction |
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Answer» Male and female involved. Fusion of the male and female gamets. Results in variations. Gametes are formed. Adopted by higher organisms. Offspring are not identical to parents Means |
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| 45663. |
What is jule law of heating |
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Answer» H=I^2*R*T Joule heating, also known as Ohmic heating and resistive heating, is the process by which the passage of an electric current through a conductor produces heat. |
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| 45664. |
have admit cards been released for board exams???? ###CBSE |
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Answer» Ok Really? Yes |
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| 45665. |
What is quicklime and how is formed |
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Answer» Actually its formed by heating limestone which contains calcium carbonate..Caco3----> CaO + Co2 on heatingThermal Decomposition Reaction...Hope its clear.... 2Ca + O2 ---->2 CaO CaO is quicklime.Ca+O=CaO |
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| 45666. |
State the direction of magnetic field in the given diagram |
| Answer» North to south outside bar magnet .south to north inside bar magnet. | |
| 45667. |
working of electric generator with construction |
| Answer» It works on the principal of electromagnetic induction | |
| 45668. |
Why nitrogen gas has strong covalent bond |
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Answer» Nitrogen gas has triple covalent bond that\'s why it makes strong covent Nitrogen never make covalent bond it make ionic bond in this question on place of covalent the ionic bond word used in place of covalent bond |
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| 45669. |
The name given to such projects of waste disposal for producing energy |
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| 45670. |
The flow of energy of food chain is unidirectional why |
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Answer» Energy which passes through the autotrops does not revert back to the solar radiations and energy which passes to the herbivores does not came back to the autotrops. As energy passes through each successive trophic level and is no longer available to previous level. Hence energy flow is considered as unidirectional. The flow of energy in food chains is unidirectional. The energy which passes to the herbivores does not come back to the autotrophs.\xa0The energy that is captured by the autotrophs does not revert back to the Sun. Therefore, in the food chain, the energy moves progressively through various trophic levels. This energy is no longer available to the previous trophic level. Thus, the flow of energy in a food chain is unidirectional. |
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| 45671. |
Why Fe shows two valency with SO4 .....and 3 valency with oxygen during Fe2O3 |
| Answer» because it has two isotopes ferrous and ferric. | |
| 45672. |
Why Fe shows two valancies with iron |
| Answer» because it has 2 isotopes | |
| 45673. |
Role of mammary gland in females |
| Answer» Feeding the babies when they are young | |
| 45674. |
What is a test-cross |
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| 45675. |
What is function of chromosomes |
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Answer» \tChromosomes are thread-like organized structures located inside the nucleus of both animal and plant cells. Each chromosome is made of the combination of proteins and deoxyribonucleic acid (DNA).\tChromosomes basically control all the activities of a living cell. DNA present on the chromosome not only carries most of the genetic information but also controls the hereditary transference.\tChromosomes are essential for the process of cell division, are responsible for replication, division, and creation of daughter cells which contain correct sequences of DNA and proteins.\tChromosomes are often called as the \'packaging material\', because it tightly holds the DNA and proteins together in the eukaryotic cells. To transfer hereditary information to the progeny. |
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| 45676. |
Why hydrogen sticks to the surface of calcium, when Ca reacts with water |
| Answer» After calcium reacts with water, hydrogen gas is released in the reaction. This bubbles of hydrogen gas stick to the surface of the metal. The buoyancy of the gas bubbles lifts the calcium up. Therefore, calcium floats on water.The reaction of calcium with water is less violent. However, the heat released is not sufficient for the hydrogen to catch fire.Ca (s) + 2H2O (l) → Ca(OH)2 (aq) + H2 (g)\xa0 | |
| 45677. |
What is biomass and how\'s it renewable?? Plz explain.. |
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Answer» Biomass is the plant and animal remains which are used in the preparation of biogas in biogas plants . It is popularly known as gobar gas in India. It is a non conventional and eco friendly source of energy. The biogas evolved by biomass can be used for various domestic purposes.Biomass is the fuel developed from natural and organic materials or wastes, which are renewable and sustainable source of energy. The energy obtained frm the decomposition of plant and animal waste and left over crop on harvesting by microorganisms in the absence of oxygen is known as biomass energy... It is renewable bcoz they r obtained from plants and animals which can be produced again and again. Biomass are those substances which are obtained by plants and animals and also from their excreta .E.g.--------wood, animal dung, agricultural wastes etc |
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| 45678. |
What is placeta |
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Answer» Placenta - A special tissue embedded in the uterus wall with the help of which human embryo gets nutrition from mother’s blood. It provide large surface area for glucose and O2 to pass through mother’s blood to the embryo. The metabolic waste generated by embryo is removed through placenta into mother’s blood. It is a disc shaped tissue developed between the foetus and the uterine wall..which fulfills the nutritional requirement of the foetus..and helps in excretion and respiration.....HOPE IT HELPS YU? |
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| 45679. |
I want notes of carbon and componends and periodic classificationCan you please send me the notes |
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Answer» . Take the 100% book Easy notes are provided in the app ..Check it out.. Cant send here......yu can see in this app |
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| 45680. |
Why is the colour of sunset and sunrise red ? Please answer |
| Answer» Because during the sunset and sunrise the sun came near to the horizon and the sunlight had to cover a large distance to reach the earth. During the pathway all the colour having short wavelength scattered but only the red colour reached to the eyes of observer. | |
| 45681. |
explain any three functions of Ozone layer ?(3M) |
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Answer» Ozone layer\xa0(stratospheric\xa0ozone) is a high concentration of\xa0ozone\xa0molecules about 30 to 50 km altitude (stratosphere). The main\xa0function\xa0of the\xa0ozone layer\xa0is to absorb the Sun\'s ultraviolet radiation, hence protecting the Earth from its harmful effects. Ozone layer provide protection from uv rays. Protect our glaciers from melt. Protect us from skin cancer |
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| 45682. |
Why biological magnification is highest at fourth trophic level |
| Answer» Bcoz concentration of chemocals invreases as trophic level increase | |
| 45683. |
Which is the largest organ in human body |
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Answer» Liver Liver Liver is the highest and haviest argan in human body about 1.6 kg |
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| 45684. |
Which is the master gland of our body |
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Answer» Pituitary gland Pituitary gland Hypothalamus gland |
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| 45685. |
Why is the homologous series of Alkenes start with Ethene , why not with methene |
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Answer» Because in alkenes there is = {double} bond needed while meth used for single carbon and single carbon doesnt make dobule bond thats why.... Because in the structure of Alkenes, there is a double bond presnt. In compunds of Meth, there is only one carbon. And that carbon cannot make double bond with anyone not even with Hydrogen. Because carbon cannot form double bond with hydrogen that\'s why Freinds please answer it |
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| 45686. |
The number of isomers of an alkane with molecular weight 72 is |
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| 45687. |
In electrolytic decomposition of water, which gas is double in amount and why? |
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Answer» Hydrogen gas is double. Because there are two hydrogen molecules are present in water whereas oxygen has single molecule. Sorry covalent Hydrogen gas is double because two molecule of hydrogen form completed bond with one oxygen atom in order to complete it\'s outermost cell electron |
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| 45688. |
What is meant by intercoarsing Explain deeply please! |
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| 45689. |
What are the two criteria for modern periodic table |
| Answer» Two criterias are:-1) atomic number 2) same properties of elements | |
| 45690. |
What is the meaning of aliphatic word in carbon and its compound chapter? |
| Answer» forming open chains not rings.....?? | |
| 45691. |
Why Iight split into seven colour when pass through a glass prism |
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Answer» (i) The splitting up of white light into seven colours on passing through a transparent medium like a glass prism is called dispersion of light.(ii) The dispersion of white light occurs because the angle of refraction for different colours of light is different when passing through the glass prism. due to refraction through the glass prism...?? |
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| 45692. |
Name two fossil fuel ??? |
| Answer» Coal and petroleum | |
| 45693. |
Name teo metals that are obtained by electrolysis of their chloride in molten state |
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Answer» Potassium,sodium,calcium,magnesium,zinc Highly reactive metals |
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| 45694. |
What is compensation point ? |
| Answer» When the rate of photosynthesis is equal to rate of respiration, it is called as compensation point. The rate of liberation of O3 during photosynthesis is equal to the rate of liberation of CO2 during respiration. Thus, there is no net uptake of gases from the environment. Compensation point is usually reached at dusk and dawn and on a cloudy day. | |
| 45695. |
State the purpose of developing ph scale |
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Answer» So as to get the ph value of a substance To know the substance is acid or base |
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| 45696. |
Managment of forest and wildlife resources is very challenging task.Why?Give any two reasons. |
| Answer» 1)the trees are cutted at a very high rate2)due to increasing pollution | |
| 45697. |
What are the limitations of dams |
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Answer» 1) people have to displace 2) create ecological imbalance 3) destruction to wildlife Most important limitations of dam is many usable land are submerged 1)not made everywhere2) requires high capital to be made3) destruction of wildlife and nature |
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| 45698. |
Why silicon can not form a lot of compounds it is also tetravalent? |
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| 45699. |
What is definition of resistivity? |
| Answer» It is numerically equal to resistance of a conductor of length 1 metre and 1 m sq. cross sectional area | |
| 45700. |
How will an organism benifited if it reproduces through spores.. |
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Answer» 1) sporangium save from unfavorable condition 2) a large number of spore are formed Spores are covered by tje outer layering called cyst wen thete is favoutable conditions the cyst nreaks down n the spores r releasd they r light and r easily transferred by wind |
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