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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.
| 66601. |
What are the two advantage of charcoal over wood as a fuel??? |
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Answer» Advantages of charcoal over wood:-1.It has high calorific value than wood.2.It do not produce poisonous gases. It doesn\'t leave a large amount of residue on burning and also have a high calorific value |
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| 66602. |
What is a food web with example |
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Answer» \tFood web is a network of food chains where all the chains are naturally interconnected.\tEach organism is generally eaten by two or more kinds or organisms which are again eaten by several other organisms and so instead of straight line food chain, the series of organisms dependent on one another food can be shown by branched lines which is called as a food web.\tFlow of energy in a food chain is unidirectional, once it reaches the next tropic level it does not come back again.\tFor example- energy which passes to the herbivores does not come back again to autotrophs. Ex=sugar A food web is a natural interconnection of food chains and a graphical representation of what-eats-what in an ecological community. |
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| 66603. |
How would you distinguish between an alcohol and a carboxylic acid |
| Answer» Alcohols and carboxylic acids can be distinguished by litmus test and\xa0Reaction with sodium hydrogen carbonate\xa0(i)Litmus test – Alcohol will have no effect on the litmus paper. Carboxylic acid acid will change blue litmus paper into red.(ii)Reaction with sodium hydrogen carbonate –\xa0Alcohol\xa0has no reaction with sodium hydrogen carbonate (NaHCO3) but in the case of\xa0Carboxylic acid\xa0it reacts with NaHCO3\xa0which gives CH3COONa, CO2\xa0and H2O. The reaction is evident as the carbon dioxide will turn the lime water milky. Thank you?? | |
| 66604. |
Explain why every food chain starts with producers only? |
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Answer» Kya 101% correct?? The food chain, which is sometimes called a food web, starts with plants because they are the producers. You cannot have a food chain until food has been produced. Plants are called producers because they use energy from the sun to make their own food through a process called photosynthesis. Bilkul 101%correct answer Because jab tak koi cheez produce nhi hogi chain kese form hoga ? |
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| 66605. |
Light velocity in diamond is (u=2.42) |
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Answer» Dhnyavad ji Answer 1.24×10^10 cm/sec he but mujhe pata nhi kese aaya aapko pata he to bata do 1/2.42 |
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| 66606. |
Describe the concept of miracal |
| Answer» Miracle seeds or High yielding variety (HYV) seeds are helpful in increasing the production of food grains. The use of this seeds requires the use of fertilisers and pesticide in the correct quantities and regular supply of water. | |
| 66607. |
Difference between balanced chemical equation and unbalanced chemical equation |
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Answer» In a balanced chemical equation the total number of reactant is equal to total number of product,and in unbalanced chemical equation it is not In a bälanced chemical equation number of reactants is equal to thenumber of product formed while in unbalanced equation it is not so. |
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| 66608. |
In cbse board exam there is tight marking ?... |
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Answer» Hello 3 times paper check hote hai1.Examiner 2.Moderator 3.Chief Moderator And marks of chief moderator are final Nooo, not that much......... |
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| 66609. |
i am studing 10th class should i read ncert books or any other ? |
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Answer» Ncert is enough, but extra yu can solve sample papers........ Schand and ncert Ncert and exampler |
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| 66610. |
What waste products are eliminated in plants other than CO2 and O2 ? |
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Answer» Gums ,resins,water etc Water , dead cells , dry leaves ,etc... Water; dead cells; Dried leaves , old xylem tissues , etc.. |
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| 66611. |
What is the bi product of photosynthesis. |
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Answer» O2 , water n energy.. Oxygen is the bi product of photosynthesis |
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| 66612. |
What happens when ferrous sulphate reacts with potassium permanganate |
| Answer» When ferrous sulpahte is added to acidic potassium permanganate slowly the purple colour fades away because acidic potassium permanganate is an oxidising agent and it converts ferrous ions into ferric, while the purple permanganate changes to colourless manganese sulphate. | |
| 66613. |
What is Joint act forest management? Explain |
| Answer» Joint Forest Management (JFM) has become almost synonymous with forest and natural resource management these days. Any approach or strategy for the protection, conservation and development of forest resources and forest ecosystem involves the participation of local people in the entire management process. | |
| 66614. |
Female reproduction system |
| Answer» You seen in your book | |
| 66615. |
what is an pyruvic acid |
| Answer» Pyruvic acid can be made by glucose by glucoliysic | |
| 66616. |
Marking scheme of science Pl please please please Send me |
| Answer» | |
| 66617. |
Male reproductive system?? |
| Answer» Male reproductive system consist of testis, ******* sac, epididymis, seminal vesicles, vas deferens, prostate gland , ***** , urethra The human male consist of male gonads called testis, a series of duct ( epididymis , vas deferens, ejaculatory duct , urethra) that serve to transport spermatozoa to the vaginal cavity and accessory *** glands( seminal vesicles, prostate and bulburethral glands). | |
| 66618. |
What is meant by periodicity of properties of elements |
| Answer» The properties of elements in modern periodic table get repeated after a certain period | |
| 66619. |
How is zinc extracted from its ore |
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Answer» Sulphide ore by roasting and carbonate ore by calcination. By the process of roasting n calcination....it depends on the type of ore |
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| 66620. |
What are the characteristics of modern periofic table? |
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| 66621. |
What is esterification ? |
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Answer» The reaction between ethanol and ethanoic acid to give ester or ethyl ethanoate and water is esterification reaction between ethanol and ethanoic acid |
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| 66622. |
What us the far point and near point of humab eye with normal vision? |
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Answer» The far point of a normal vision is infinite and the near point of human eye with normal vision is 25 cm. Thank you?? Far point is infinity Near point is 25 cm |
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| 66623. |
What is the rules for the inheritance of traits - mendal contribution |
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| 66624. |
Characteristic of genes |
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| 66625. |
How do genes control traits |
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| 66626. |
DNA copying is error proof or not? |
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| 66627. |
Which has higher pH: 1-MHcl or 1- MNaOH |
| Answer» NaOHBecause it is the base and the vqlue of base is always moe than 7But HCl is the acid and its value is always less then 7 So the NaOH have higher value of ph | |
| 66628. |
What is the range of vision for normal human eye?? |
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Answer» 25cm to infinity ?? 25 cm to infinity is the range of normal human eye It is between zero to 25 cm. |
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| 66629. |
What is the unit of magnetic field |
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Answer» Tesla Teslas |
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| 66630. |
Two metals found in nature in the free state? |
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Answer» Elements at the bottom of reactivity seriesGold AuSilver Ag Brass & bronze are alloys Gold, silver...... Brass and bronze |
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| 66631. |
Write the number of covalent bond of ethane |
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Answer» 7 7 covalent bonds 2 |
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| 66632. |
Why some metals does not react with cold water? |
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Answer» Due to their reactivity Because they are less reactive and they react only steam to form oxides |
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| 66633. |
What is volatile material |
| Answer» Which can vaporise easily and faster | |
| 66634. |
If i wish to do sample papers from which board it should belong CBSE OR HBSE |
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Answer» Obviously cbse Offcourse cbse.. Super 20sample paper of cbse |
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| 66635. |
Difference between anaerobic and aerobic respiration? |
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Answer» Aerobic respiration takes place in presence of oxygen and also release large amount of energy whereas anaerobic respiration take place in absence of oxygen and release less amount of energy 2 in aerobic res. Energy is large in amount where as in anaerobic res. Energy is less in amount3 end product in aerobic res. are co2 H2o and 38 ATP where as in anaerobic res.are co2 C2H5OH amd 2 ATP Aerobic refers to presence of Oxygen and absence of oxygen refers to anaerobic, lactic acid is produced during aerobic where none is produced during anaerobic, high amount of energy is produced in aerobic respiration with 38 glucose molecules and low energy with 2 glucose molecules during anaerobic Aerobic respiration occur in presense of oxygen where as anaerobic respiration occur in absence of oxygen |
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| 66636. |
What is Diffusion? ?? |
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Answer» Diffusion is the movement of molecules( either solids, liquids, or gases) from a region of higher concentration to a region of lower concentration. The movement of gases (like carbon dioxide and oxygen) from a region of high concentration to a region of low concentration through a semi permeable membrane is known as diffusion. Thus, diffusion plays an important role in gaseous exchange between the cells as well as the cell and its external environment. Diffusion is the net movement of molecules from a region of higher concentration to a region of lower concentration . |
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| 66637. |
What is sterlisation |
| Answer» The process of making something free from bacteria or other living micro-organisms.. is called sterilization. | |
| 66638. |
Which metal can float in water?and why |
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Answer» Lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs) and francium (Fr). These metals float on water because of two reasons: they are very light weight metals and they react very aggressively with water to form hydrogen gas which helps them to float in water. Calcium can float in water because when calcium reacts with hydrogen and oxygen , bubble are formed that sticks to calcium and make it float.............✌️✌️✌️ |
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| 66639. |
What focal length can be assigned to plane mirror?Hi Friends itz my new id!! |
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Answer» F=r/2F=0/2. Because value of r in plain mirror is 0 =0 Its infinity. Infinity. Focal length of the mirror is zero. Because f = radius of curvature(r) / 2\xa0As r is 0 so f = 0/2 = 0\xa0By definition the focal length of plane mirror is infinity. Most wlcm but don\'t call me ji Thnx anushka jii.. By definition, focal length of plane mirror is infinity. |
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| 66640. |
why do parallel rays of different colour deviate differently while passing through a glass prism? |
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Answer» Due to its different wavelength Because they all light ray colours\' wave length vary differently that why their speed, deviation, brightness vary from each other. This is the main reason why we can able to see different colors and mentally vary this color. I know but the question is of 5 marks Because they all have different speeds |
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| 66641. |
Explain embryological evidence |
| Answer» \tThe embryology of different vertebrates provides very strong evidence of different vertebrates showing striking similarities.\tThere is an obvious similarity between embryos of fish, amphibians, reptiles, birds, and mammals.\tA comparison of embryos of vertebrates shows that all have gill slits, even though they do not remain later in life, except in fish. This indicates a fundamental step that is common to all vertebrates and supports the idea of a common ancestor.\tOther features that do not exist in the adult form but appear in the embryos include\xa0limb buds in Dolphins and human tail buds.\xa0\tThis shows that\xa0these species share a common ancestor, so their developmental processes occur in a similar way, regardless of what other changes have taken place since their divergence. | |
| 66642. |
write the different between biodegrable and non biodegrable substance? |
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Answer» How yu are posting d answers in boxes plzz tell me d way \tBiodegradable wastesNon-biodegradable wastes1. These wastes can be broken down into non-poisonous substances by the action of microorganisms like bacteria and earthworms.1. These wastes cannot be broken down into harmless substances by any biological processes.2. Biodegradable substances change their form and structure over time and become harmless.2. Non-biodegradable substances remain unchanged over a long period of time.3. They do not pollute the environment.3. Some of them remain inert and begin to accumulate in our surroundings, while others cannot be made less toxic easily and hence keep on polluting the environment.Examples: Spoilt food, vegetable peels, tea leaves, wood, grass, paper, leather, cotton, cattle dung etc.Examples: Glass bottles, metal cans, polythene bags, synthetic fibres, radioactive wastes, plastics and pesticides like DDT etc.\t |
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| 66643. |
what sre bio magnification |
| Answer» | |
| 66644. |
what is bio- magnification? |
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Answer» The process of harmful and toxic substances enter the food chain nd get concentrated in body of organism at each successive tropic level is called biological magnification. Accumulation of chemical substances at different trophic levels is termed is Bio magnification |
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| 66645. |
Write a brief note on "Electrolytic refining of metal" |
| Answer» In an electrolytic refining of metal cathode is made from strips of pure metal and anode is made from impure metal and metal salt solution is used as an electrolyte and when we pass the elecricity through the sol pure metal from anode deposit at cathode and impurities disolves in water and insoluble impurities settle down at bottom of cathode and known as anode mud. | |
| 66646. |
What are Ionic Compoud |
| Answer» Ionic compounds are compounds made up of ions. These ions are atoms that gain or lose electrons, giving them a net positive or negative charge. Metals tend to lose electrons, so they become cations and have a net positive charge. ... Ions of opposite charge are held together by very strong ionic bonds within the compound. | |
| 66647. |
Heredity and evolution chapter mai kya learn krna h??? |
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Answer» You also have to learn about accumulation of variation in species mendels contribution in rules of inheritence or difference between aquired and inherited traits speciation conditions for speciation, how evolution and classification are interlinked role of homlogus and analogus organs in the study of evolution, how fossils are formed somatic and non somatic cells molecular phylogeny and human evolution You have to learn about definitions of heredity evolution dominant and recessive traits homologus analogus organs fossils |
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| 66648. |
Is nuclear reactions does not break the conversation of mass theorem? If not then why? |
| Answer» Nuclear\xa0fusion\xa0reactions\xa0violate\xa0law of conservation of mass, but it\xa0has notyet been taken into account. ... Thenlaw of conservation\xa0must be redefined as: during any physical or chemical change, the total\xa0mass\xa0of the reactantsis\xa0equal to the total\xa0mass\xa0of reactants provided\xa0mass has not\xa0undergone conversion into energy. | |
| 66649. |
Give the reason of formation of scum when soaps are used with hard water. |
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Answer» When soaps are used with hard water then the soluble ca &mg salts present in hard water form insoluble precipitate with the soap which sticks to the cloth which is being washed Due to formation NA + in hard water.. |
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| 66650. |
Why atomic radius decreases across a period? |
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Answer» On moving across a period in a periodic table, atomic radii decreases because electrons increases in the same shell and protons increase in the nucleus. Along the period it decreases because of increase in nuclear charge which pulls the electrons charge closer to nuclear charge Becoz of the lossing power of electrons of an atom decreases.. |
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