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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 2501. |
/All organisms including bacteria and fungi feed on dead plants and animals. Then why areonly bacteria and fungi known as decomposers? |
| Answer» <p>thanks a lot.</p> | |
| 2502. |
whereas glass is a bad conductor of clectricity |
| Answer» <p>Glass is actually an insulator. It doesn'tallow the flow of electrons easily from atom to atom, as seen in substances like copper, and other metals which are excellent conductors of both heat and electricity. Insulators have electrons that are held tightly which means they aren'tshared between other atoms.</p> | |
| 2503. |
Explain the process and precautions in verifying law of conservation of mas. |
| Answer» <p>Ans :- Process :Take 5ml of sodium sulphate solution in a measuring cylinder and pour it into a conical flask.</p><p>Take about 5 ml of barium chloride solution in another measuring cylinder and pour it into a 10ml test tube.</p><p>Tie the test tube using a thread and hang the test tube in the conical flask carefully, so that the solutions do not mix with each other.</p><p>Put a cork in the mouth of the flask so that the thread holding the test tube is held firmly in place.</p><p>Carefully weigh the flask on a weighing balance and note the reading.</p><p>Tilt and swirl the flask so that barium chloride solution in the test tube spills and mixes with sodium sulphate solution in the flask and forms a white coloured precipitate of barium sulphate (BaSO4)and an aqueous solution of sodium chloride (NaCl).</p><p>Wait for 10 min. to complete the reaction. The white precipitate settles down to the bottom of the flask.</p><p>Weigh the contents of the flask again and note the reading.</p><p>Precautions :</p><p>When setting up the apparatus, and while taking the first reading of the total mass of apparatus and reactants, care must be taken that the barium chloride solution in the ignition tube does not spill and mix with the sodium sulphate solution in the conical flask.</p><p>To start the chemical reaction, tilt and swirl the flask well so that barium chloride solution in the ignition tube spills and mixes with sodium sulphate solution in the flask.</p> | |
| 2504. |
(b) An object is placed at a distance 27 c.m. in front of a con-cave mirror. The image is formed 54 c.m. from the mirror inthe same side of the object. Find the focal length of the concavemirror.2 |
| Answer» <p>thanks... </p> | |
| 2505. |
| ,mm के il - Bl € (e b ,~...‘ " “i Ty oA -0५1 0५४५ Ss |
| Answer» <p>The soil profile is one of the most important concepts in soil science. It is a key to understanding the processes that have taken in soil development and is the means of determining the types of soil that occur and is the basis for their classification. The soil profile is defined as a vertical section of the soil from the ground surface downwards to where the soil meets the underlying rock. The soil profile can be as little as 10 cm thick in immature soils and as deep as several metres in tropical areas where the climate is conducive to rapid alteration of the underlying rock to form soil. In temperate areas, the soil profile is often around a metre deep and in arid areas somewhat shallower than this.</p><p>Virtually all soil profiles are composed of a number of distinctive layers, termed horizons, interpretation of which is the key to understanding how the soil has formed. Most soils will have three or more horizons. Soils that have not been cultivated will normally have L, F and H layers at the surface. These layers largely represent different degrees of decomposition of organic matter, the L layer representing thelitter layerformed of recognisable plant and soil animal remains, the F layer below, thefermentation layer, usually consisting of a mixture of organic matter in different stages of decomposition, and the H layer, thehumose layer, consisting largely of humified material with little or no plant structure visible. Below these, and in cultivated soils occupying the surface layer, is the A horizon composed of a more or less intimate mixture of mineral and organic matter. The A horizon is often referred to as the ‘ploughed layer’ in cultivated soils. It is an important part of the soil because it is a source of plant nutrients and contains the majority of plant roots. The A horizon may lie directly on the B horizon or, in well developed soils, there may be an intermediate leached horizon, termed E or A2, depending on the nomenclature system used. The E/A2 horizon is usually paler in colour than the horizons above and below because it is a horizon that has been subject to leaching and loss of components compared to the A and B horizons.</p><p>The B horizon is the horizon most widely used to identify soil types. Its morphology is important in supporting the classification of soils. In some soils the B horizon results purely from the weathering of the underlying rock whereas in other soils this weathering is supplemented by the translocation of materials from overlying horizons. Thus the B horizon needs to be inspected carefully in order to understand the genesis of the soils. B horizons may have a number of different subscripts indicative of the nature of the materials that have moved into the horizon, e.g. Bh indicates the translocation of humus into the horizon, Bs, the translocation of sesquioxides. These subscripts will vary according to the nature of the soil component that has accumulated but also with the system of nomenclature of soil types.</p><p>Below the B horizon is the C horizon. This latter horizon is often consistent with the parent material and may have been little altered from the material in which the soil originally formed.</p><p>Most soils have A, B and C horizons. Some, generally weakly developed, soils may have A horizons lying directly on C horizons. When next you see a profile down through the soil, perhaps in an excavated pit or in a roadside cutting, take time to look at the profile and see if you can identify some of the different soil layers that make up the profile.</p><p>Please hit the like button if this helped you</p> | |
| 2506. |
1.Name two hard and two soft objects. |
| Answer» <p>Hard objects - brick , ironsoft objects - feathers, cotton</p> <p>hard objects: cement, bricksoft objects: rubber ball, polythene</p> | |
| 2507. |
Figure-6.33 shows two coherent sources S, and S, which emitsound ofwavelength λ in phase. The separation between thesources is 32. A circular wire of large radius is placed in such away that S,S, lies in its plane and the middle point of S,S2 is atthe centre ofthe wire. Find the angular positions θ on the wirefor which constructive interference takes place. |
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| 2508. |
15. A bal is gently dropped from a height of 20 m. If itsvelocity increases uniformly at the rate of 10 m s -2, withwhat velocity will it strike the ground? After what time willit strike the ground? |
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| 2509. |
Inertia and Mass |
| Answer» <p>Inertia, property of a body by virtue of which it opposes any agency that attempts to put it in motion or, if it is moving, to change the magnitude or direction of its velocity.</p><p>Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has.</p> | |
| 2510. |
example of source of light another than sun |
| Answer» <p>bulb ,lamp,tube light etc </p> <p>Bulb, lamp, tube, torch, star fire</p> <p>bulb tube fire lamp star etc</p> <p>Bulb, Lamp , Tube light , Torch , </p> <p>bulb,lamp,fire tube light </p> <p>bulb, lamp, tube , light is the correct answer of the given question</p> <p>Bulb,lamp,tube,torch,etc</p> | |
| 2511. |
Identify the incorrect pair :(A) Fish - GillsŠ Earthworm - Skin(B)(D)Cockroach -- TracheaTadpole Larva - Lungs |
| Answer» <p>tadpole --- lungs</p> <p>tadpole larva- lungs</p> <p>answer is (d) tadpole lava lungs</p> <p>a correct answer is (B) </p> <p>Tadpole larva -lungs</p> <p>The incorrect pair is ( D ) Tadpole Larva -- Lungs</p> | |
| 2512. |
Fig. 7.9The structures ofa) XeF2, (b) XeF4c XeF6, (d) XeOF4and (e) Xe03 |
| Answer» <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> | |
| 2513. |
1. Choose correct optionA. Which is not a property of living being?a. Metabolismb. Decayc. Growthd. Reproduction |
| Answer» <p>decay is not property of living being </p> <p>decay is not a property of a living being</p> <p>decay doesn't come under property of living being.</p> <p>The correct option is option B Decay..</p> <p>Decay is not a property of living being</p> <p>decay is not the property of living being</p> <p>Yes decay is not a living being </p> <p>decay is not a property of a living being </p> <p> b.) Decay is the crrct answer </p> <p>Correct answer is option b:Decay</p> <p>correct answer is option B decay</p> <p>it is not a property of living beingmetabolism</p> <p>The correct answer is B. Decay</p> <p>b.Decay is a property of microbes</p> <p>Decay is not a property of living being</p> <p>the answer is b. decay</p> <p>decaying is the not a property of human beings</p> <p>(a) is the right answer</p> | |
| 2514. |
How many type of plant about three basic tissue system of the following plant |
| Answer» <p>Plants have onlythreetissue types: 1) Dermal; 2) Ground; and 3) Vascular. Dermal tissue covers the outer surface of herbaceous plants. Dermal tissue is composed of epidermal cells, closely packed cells that secrete a waxy cuticle that aids in the prevention of water loss.</p> | |
| 2515. |
Who discovered natural magnet? |
| Answer» <p>Magnes was discovered the magnet.</p> <p>The firstmagnetswere notinvented, but rather werefoundfrom anaturallyoccurring mineral called magnetite. Traditionally, the ancient Greeks were the discoverers of magnetite. There is a story about a shepherd named Magnes whose shoe nails stuck to a rock containing magnetite.</p> <p>The first magnets were not invented, but rather were found from a naturally occurring mineral called magnetite. Traditionally, the ancient Greeks were the discoverers of magnetite. There is a story about a shepherd named Magnes whose shoe nails stuck to a rock containing magnetite</p> <p>magnes discovered the magnet</p> | |
| 2516. |
isotope |
| Answer» <p>Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.</p><p> All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom.</p> | |
| 2517. |
Questionsnitrogen fixation occur in those plants which do not1) How does thehave root nodules |
| Answer» <p>Nitrogen is an essential nutrient in plant growth.The ability of a plant to supply all or part of its requirements from biological nitrogen fixation (BNF) thanks to interactions with endosymbiotic, associative and endophytic symbionts, confers a great competitive advantage over non-nitrogen-fixing plants.</p> | |
| 2518. |
Questions1) How does the nitrogen fixation occur in those plants which do nothave root nodules? |
| Answer» <p>It's not important that every plant should have root nodules because other bacteria such as anaebena can fix nitrogen. </p> | |
| 2519. |
Write the reactions of followings with boron) Sodium hydroxide b) Nitrogen |
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| 2520. |
Write the reactions of followings with borona) Sodium hydroxide b) Nitrogen |
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| 2521. |
What happens if the percentage of oxygen in the air reaches to 70%? |
| Answer» <p>If any substance catches fire it will become difficult to extinguish the fire, as oxygen supports combustion.</p> | |
| 2522. |
Q15. What is hydrogenation? What is its industrial app |
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| 2523. |
1. Write the valanced chemical equation for the following reactionCalcium hydroxide+carbon dioxideCalcium carbonatet Water |
| Answer» <p>thanks</p> | |
| 2524. |
17. Common name of the given compound is :-(1) vinyl acetate(3) methyl acrylate (4) Vinyl ethanoateethyl ketone has the structure -(2) acryl acetatea18. The second member of the homologous series of2) CHCHCCH(3) CH C-CH,CH.(4) CH, CCHCH, O |
| Answer» <p>17.Vinyl Acetate</p> | |
| 2525. |
afa AxB-Ka, l), (b, 3), (a, 3), (b, 1), (Đ°, 2), (b, 2)., dlT |
| Answer» <p>All the first element of the ordered pair belongs to Set A.</p><p>A ={a,b} and B ={1,2,3}</p> | |
| 2526. |
17. A projectile is projected in the upward directionSmaking an angle of 60° with the horizontal directionwith a velocity of 147 ms 1. After what time will itsinclination with the horizontal be 45? |
| Answer» <p>let after time t its inclination with horizontal is 45</p><p> at this time Vy /Vx =tan45 or Vy =Vx</p><p> Vx remains constant =147cos60 =Vy</p><p> now using equation of motion for verticle direction</p><p> Vy=Uy-gt..........eq1</p><p> Uy=147sin60 ,Uy=147cos60</p><p>putting in eq 1,</p><p> t=5.36 sec</p> <p>kindly elaborate your answer</p> | |
| 2527. |
23. How has the ever increasing number of industries in India made worse position by exerting pressureon existing fresh water resources? Explain. |
| Answer» <p>Increasing number of industries exerting pressure on fresh water resources –(i) Industries are heavy users of water.(ii) More demand of hydro electric power.(iii) Industrial wastes and effluent are discharged into rivers causing water pollution.(iv) Multiplying urban centers, due to industries, has caused pressure on water resources.</p> | |
| 2528. |
What is S.I. system of units? Explain its need. |
| Answer» <p>Voltage is unit ahr option tak na</p> | |
| 2529. |
. APPange following compound increasing order of acidity |
| Answer» <p> i < ii< iii < iv </p><p>triple is always most acidic and then double and then single bond.</p> <p>ty</p> | |
| 2530. |
3.3 HOW DO METALS AND NON-METALS REACT? |
| Answer» <p>Ans :- Themetals reactwithnon metalsby giving electrons and in turn thenon-metals take the electrons. Chemical bonds involve electrons from thereactingatoms. Compounds formed frommetals and non-metalsconsist of ions. Metalatoms lose electrons to form positively charged ions.</p> | |
| 2531. |
Conpect a battery to the terminals and complete the circuit diagram so that it works as adiicer meter Incicate the output terminals also.UT-JEE(Main) 20 |
| Answer» | |
| 2532. |
3. Short note on musical instruments. |
| Answer» <p>Amusical instrumentis an instrument created or adapted to makemusical sounds. In principle, any object that produces sound can be considered a musical instrument—it is through purpose that the object becomes a musical instrument.</p><p>The history of musical instruments dates to the beginnings of human culture. Early musical instruments may have been used for ritual, such as atrumpetto signal success on the hunt, or adrumin a religious ceremony. Cultures eventually developed composition and performance ofmelodiesfor entertainment.</p><p>Like my answer if you find it useful!</p> | |
| 2533. |
(12) Measuring of sound under water(13) Measuring the relative humidity of the atmosphere(14) Measuring of solar radiations(15) Measuring the velocity of wind(16) Measuring of concentration of sugar solution(17) Measuring of high temperature |
| Answer» <p>1. sonar2. psychrometer3. pyranometer4. anemometer5. pyrometer</p> | |
| 2534. |
\frac { 27 } { 63 } \times \frac { 99 } { 54 } |
| Answer» | |
| 2535. |
what is nature of linear magnification produced by convex mirror? |
| Answer» <p>For a real object, the magnification will be positive and between 0 - 1 because the image formed will be virtual, erect and diminished</p> <p>The image formed is always diminished for an object kept anywhere between infinity and the pole.Hence, the magnification would always be less than 1</p> | |
| 2536. |
S)Q.13)Differentiate between Anode & Cathode. |
| Answer» <p>1. The cathode is typically the negative side while the anode is the positive side.</p><p>2. The anode is the electrode where the electricity flows into it.</p><p>3. The cathode is the electrode where the electricity flows out of it.</p> | |
| 2537. |
Why frst ionisation enthalpy of Cr is lower than that ofZn ? |
| Answer» <p>First ionisation enthalpy of Cr is lower thanthat of Zinc because in case of zincfirstelectron has to be remove from fulfilled orbital and full filled electronic configuration is most stable so it require high energy to remove electron from it.</p> | |
| 2538. |
INWrite four equivalent fractions of |
| Answer» <p>Equivalent fractions of 2/5=4/10,6/15,8/40Answer </p> <p>2/5=4/10=6/15=8/20=10/25answer.</p> <p>2/5 x2/2=4/10 </p> <p>2/5=4/10,6/15,8/20,10/25</p> | |
| 2539. |
23. State two uses of a plane mirror.2 |
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| 2540. |
5MEASUREMENTSAND UNITSferite down the difference is that arise due tthe use of different scoles in differenesfears of the world |
| Answer» <p>mughe nhi aata bhaiye</p> <p>different parts of the world use different metric systems like the MKS the CGS and the KPS system in England in Great Britain and other European countries the foot pound second system is used was in other parts of the world the SI unit that is the metre kilogram second and the centimetre gram second system is used if you come to any parts of the world living and nationality the maybe different type of metric system to be used for example metre centimetre millimetre decimeter or even in the case of liquid 1 litre millilitre decilitre hectolitre and all are the different types of metrics systems even for the Waves we have lbs lbs we have kilos we have kg we have grams so therefore due to advanced systems of metric systems that arises in different parts of the world a difference in the units therefore the quantity maybe same the conversion has to be used to get the actual quantity in a own language therefore the in different parts of the world different MKS system avenues and if the system is used by a foreign person in any other part of the world that maybe not valid or not understand it and he can be tracked very nice cake so that food to keep a fixed system the SI system is used</p> <p>in different parts of the world different units of measurements I use namely the CGS MKS and FPS system CGS transfer centimetre gram second MKS transformator kilogram second and FPS dance of profound second in different parts of the World Like The Other European Nations Great Britain and Portugal the foot pound second system is used where as other parts of the world this centimetre gram second and meet a gram second is used therefore this creates a difference in the measurement system do the systems are interconnected and interdependent on each other by various conversion methods yet if a person doesn't know conversion problems arise in in measurement and SI unit 7 different parts of the world different units of</p> | |
| 2541. |
why did the need for man_made materials arise? |
| Answer» <p>The main reason behind theneedforman made materials arise isthe increase in the population. Population increases with increase in demand ofmanmade materials.</p> | |
| 2542. |
Explain the working of human eye. |
| Answer» <p>In a normal eye light rays come to a sharp focusing point on the retina. The retina functions much like the film in a camera. The retina receives the image that the cornea focuses through the eye's internal lens and transforms this image into electrical impulses that are carried by the optic nerve to the brain.</p> | |
| 2543. |
(a) Focusing Mechanism in the Human Eye |
| Answer» <p>The eye focuses light in a similar way to when you use a magnifying glass to concentrate the Sun’s rays onto a piece of paper. The distance from the magnifyinglensto the piece of paper is thefocal length.</p><p>For the eye, light from distant objects is focused onto theretinaat the back of the eye.</p><p>The eye is about the size of a table tennis ball, so the focal length needs to be about 2.5 cm.</p><p>The cornea does most of the focusing</p><p>The crystalline lens and accommodation</p><p>Behind the aqueous fluid is the second lens system. It consists of a convex lens that is soft and pliable. Theciliary muscleis a circular ring ofmusclethat attaches all the way around the lens. This ciliary muscle can change the shape of the crystalline lens by stretching it at the edges. It is attached to the lens by zonules (ligament fibres that can be tight or loose).</p><p>When you are looking at a near object, the lens needs to become more rounded at the central surface inordertofocusthe light rays. This ability to changefocusfor close-up objects is calledaccommodation.</p> | |
| 2544. |
Define universal Gravitation constant and write its value. |
| Answer» <p>The universal gravitational constant (G) is numerically equal to the force of attraction between two bodies each of unit mass placed unit distance apart.</p><p>Value of G= 6.67×10⁻¹¹Nm² kg⁻²</p> | |
| 2545. |
Define universal Gravitation constant and write its value. |
| Answer» | |
| 2546. |
Why is G called the Universal Constant? |
| Answer» <p>Thegravitational constant(alsoknown asthe "universal gravitational constant", the "Newtonianconstantof gravitation", or the "Cavendishgravitational constant"), denoted by the letterG, is an empirical physicalconstantinvolved in the calculation ofgravitationaleffects in Sir Isaac Newton's law ofuniversal</p> | |
| 2547. |
SaturdayJANUARY 2012JAWeek 1007-Ethiopian Christmas (Ethiopia) Coptic Christmas (Sudan)8) calculate the speed and velocity idaperson completes the path Pit Bus" inTo seconds as shown in figuresOmSm6mDMR |
| Answer» <p>speed and velocity both will be 2.5 . according to given question</p> <p>If the person goes straight from P to S then velocity and speed will be same i.e 5/10= 0.5m/s</p><p>Whereas when person follows path P to S along Q and R then velocity remains same. But speed is 25/10=25m/s</p> <p>speed and velocity both will be 2.5 according to given questions</p> | |
| 2548. |
MathematicOI WOw |
| Answer» <p>convert into kilograms 625 g</p> <p>27\4 is the right answer</p> <p>27/4 is the right answer</p> <p>27 /4 is the right answer </p> <p>27/4 is correct answer.</p> | |
| 2549. |
The ..................controls all the vital functions of the cell. |
| Answer» <p>The organelle controls all the vital functions of the cell. </p> <p>The organelle controls all the vital functions of the cell. </p> | |
| 2550. |
The mass of the bob of a simple pendulum of lengthL is m. If the bob is left from its horizontal positionthen the speed of the bob and the tension in thethread in the lowest position of the bob will berespectively:-(A) /29L and 3 mg(B) 3 mg and(C) 2 mg and 2gl(D) 2 gL and 3 mg1 ka is tird to the end of a string of |
| Answer» | |