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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.
| 1351. |
what is migration |
| Answer» <p>A migration is the process of moving from one place to another place </p> | |
| 1352. |
What is meantby migration? |
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| 1353. |
3. A rocket travels at a speed of 15,000 m/s. Express this speed in km/h. |
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| 1354. |
usTest Your Knowledge1. Fill in the blanks with the right words given below:wood, fibres, jute, plants, air(3)(1) We cannot live without(2) We use_ for building our homes.are used for making clothes and somethings.is a fibre.(5) Plants purify(4) |
| Answer» <p>1plants2wood3fibres4jute5air</p> <p>plantswood fibres jute air </p> <p>1.plants 2. wood 3.fibers 4.juite 5.air </p> <p>1plants2wood3fibres4jute5 air</p><p> </p> <p>plantswoodfibresjuteair</p> <p>1) Air2)wood3) givers4) jute5) air</p> <p>1)plant2)wood3)fibres4)jute5)air</p> <p>PlantsWoodFibresJuteAir</p> <p>1.plants2.wood3.fibres4.jute5.air</p> <p>plantswoodfibresjuteair</p> <p>1. plant2. wood 3. fibres 4. jute5. ais</p> <p>1. plants2. wood3. fibres4. jute5. air</p> <p>1)plants2)wood3)fibres4)jute5)air</p> <p>we cannot live without plants</p> <p>1 plants 2 wood 3 fibres4 jute 5 air</p> <p>1. Plant 2. wood3. fibres4. jute5. air</p> <p>1). Plants 2). Wood3). Fibres4). Jute5). Air</p> <p>1-air2-wood3-fibres4-jute5-plants</p> <p>1 plants 2 wood 3 fibres4 jute 5</p> <p>plantwoodfibresjuteair</p> <p>1 plants 2 wood3 fibres4 jute5 air</p> | |
| 1355. |
Expand RER and SER differentiate between in structure and function |
| Answer» <p>Both the smooth and rough endoplasmic reticulum help in the production and storage of proteins The main difference is that one contains ribosomes on it and the other does not. The rough endoplasmic reticulum (RER) has ribosomes on its surface.The SER helps in the storage of proteins and lipids.</p> | |
| 1356. |
3.47 The criterion of spontaneity in terms of Gibbsenergy is the same as that laid down by secondlaw of thermodynamics. How? |
| Answer» <p>Gibbs free energy and spontaneityWhen a process occurs at constant temperature \text TTT and pressure \text PPP, we can rearrange the second law of thermodynamics and define a new quantity known as Gibbs free energy:\text{Gibbs free energy}=\text G =\text H - \text{TS}Gibbs free energy=G=H−TSG, i, b, b, s, space, f, r, e, e, space, e, n, e, r, g, y, equals, G, equals, H, minus, T, Swhere \text HHH is enthalpy, \text TTT is temperature (in kelvin, \text KKK), and \text SSS is the entropy. Gibbs free energy is represented using the symbol \text GGG and typically has units of \dfrac{\text {kJ}}{\text{mol-rxn}} mol-rxnkJ start fraction, k, J, divided by, m, o, l, negative, r, x, n, end fraction. [Wait, how did we get this equation?][What is a mol-reaction?]\text{mol-rxn}m, o, l, negative, r, x, n\text{mol-reaction}m, o, l, negative, r, e, a, c, t, i, o, n2 \text{Al}(s)+ 3\text{Cl}_2(g) \rightarrow 2 \text{AlCl}_3(s) 2, A, l, left parenthesis, s, right parenthesis, plus, 3, C, l, start subscript, 2, end subscript, left parenthesis, g, right parenthesis, right arrow, 2, A, l, C, l, start subscript, 3, end subscript, left parenthesis, s, right parenthesis1122\text{Al}A, l33\text{Cl}_2 C, l, start subscript, 2, end subscript22\text{AlCl}_3 A, l, C, l, start subscript, 3, end subscript1\,\text{mol-rxn}=2\,\text{mol Al}=3\,\text{mol Cl}_2=2\,\text{mol AlCl}_3 1, space, m, o, l, negative, r, x, n, equals, 2, space, m, o, l, space, A, l, equals, 3, space, m, o, l, space, C, l, start subscript, 2, end subscript, equals, 2, space, m, o, l, space, A, l, C, l, start subscript, 3, end subscriptWhen using Gibbs free energy to determine the spontaneity of a process, we are only concerned with changes in \text GGG, rather than its absolute value. The change in Gibbs free energy for a process is thus written as \Delta \text GΔGdelta, G, which is the difference between \text G_{\text{final}}G final G, start subscript, f, i, n, a, l, end subscript, the Gibbs free energy of the products, and \text{G}_{\text{initial}}G initial G, start subscript, i, n, i, t, i, a, l, end subscript, the Gibbs free energy of the reactants.\Delta \text G =\text G_{\text{final}} - \text{G}_{\text{initial}}ΔG=G final −G initial delta, G, equals, G, start subscript, f, i, n, a, l, end subscript, minus, G, start subscript, i, n, i, t, i, a, l, end subscriptFor a process at constant \text TTT and constant \text PPP, we can rewrite the equation for Gibbs free energy in terms of changes in the enthalpy (\Delta \text H_{\text{system}}ΔH system delta, H, start subscript, s, y, s, t, e, m, end subscript) and entropy (\Delta \text S_{\text{system}}ΔS system delta, S, start subscript, s, y, s, t, e, m, end subscript) for our system:\Delta \text G_{\text{system}} =\Delta \text H_{\text{system}} - \text{T}\Delta \text S_{\text{system}}ΔG system =ΔH system −TΔS system delta, G, start subscript, s, y, s, t, e, m, end subscript, equals, delta, H, start subscript, s, y, s, t, e, m, end subscript, minus, T, delta, S, start subscript, s, y, s, t, e, m, end subscriptYou might also see this reaction written without the subscripts specifying that the thermodynamic values are for the system (not the surroundings or the universe), but it is still understood that the values for \Delta \text HΔHdelta, H and \Delta \text SΔSdelta, S are for the system of interest. This equation is exciting because it allows us to determine the change in Gibbs free energy using the enthalpy change, \Delta \text HΔHdelta, H, and the entropy change , \Delta \text SΔSdelta, S, of the system. We can use the sign of \Delta \text GΔGdelta, G to figure out whether a reaction is spontaneous in the forward direction, backward direction, or if the reaction is at equilibrium.When \Delta \text G<0ΔG<0delta, G, is less than, 0, the process is exergonic and will proceed spontaneously in the forward direction to form more products.When \Delta \text G>0ΔG>0delta, G, is greater than, 0, the process is endergonic and not spontaneous in the forward direction. Instead, it will proceed spontaneously in the reverse direction to make more starting materials.When \Delta \text G=0ΔG=0delta, G, equals, 0, the system is in equilibrium and the concentrations of the products and reactants will remain constant. [What is equilibrium?]</p> | |
| 1357. |
-810. What should be added to |
| Answer» <p>58/45 should be added to get 2/5 is the best answer</p> <p>Let the required number be X (-8)/9 + X = 2/5 X = 2/5 - (-8)/9LCM of 5 & 9 is 45 X = 2×9/5×9 - (-8)×5/9×5 X = 18/45 - (-40)/45 X = 18-(-40)/45 X = 18+40/45 X = 58/45Therefore 58/45 should be added to (-8)/9 to get 2/5.</p> <p>58/45 add to get 2/5 is the answer </p> | |
| 1358. |
The decomposition of a substance follows firstorder kinetics. If its concentration is reduced to 1/8of its initial value in 12 minutes, the rate constantof the decomposition system is:8. |
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| 1359. |
How does external fertilisation take place in frogs ? Explain briefly? |
| Answer» <p>Fertilization in frogs takes place outside the female body called external fertilisation. Females lay eggs inside the water. These eggs are surrounded by a jelly like layer for protection. At the same time male frog releases sperms in water. These sperms travel to the eggs and fertilized them.</p> | |
| 1360. |
ļ Diet Chat For:-A 12 YEAR CHILD :- |
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| 1361. |
pepare a balanced diet chat |
| Answer» <p>Makehalf your plate veggies and fruits. Vegetables and fruits are full of nutrients that support good health. ...</p><p>Include whole grains. Aim tomakeat least half your grains whole grains. ...</p><p>Don't forget the dairy. Complete yourmeal witha cup of fat-free or low-fat milk. ...</p><p>Add lean protein. ...</p><p>Take control of yourfood.</p> <p>In plate keep some types of pulses like dal and some cooked vegetables like bottle ground and some fruits with salad and put olive oil on vegetables and makke ki roti,wheat roti and after taking your meal drink boiled Normal water</p> | |
| 1362. |
c) Paheli kept an empty bottle made of plastic inside a refrigerator after few hourswhen she opened the refrigerator she found the bottle had collapsed. Explain thepossible reason. |
| Answer» <p>Difference in pressure inside and outside of bottle is the reason</p> | |
| 1363. |
convex mirror is 10 cm. Where should an object be placed in front of3. Focal length of a convex mirroxFocaa convex mirror so that the image of half tho size of the object/3.is formed?Ans - 10 cml |
| Answer» <p>Since it is 1/2 times reduced, m = 1/2</p><p>so -v/u = 1/2</p><p>similarly, 1/v + 1/u = 1/f</p><p>so 1/v + 1/u = 1/-10</p><p>-v/v + -v/u = -v/-10 (multiply throughout by -v)</p><p>-1 -2 = v/10</p><p>-3 = v/10</p><p>v = -30</p><p>1/2 = -v/u</p><p>1/2 = 30/u</p><p>u = 60</p><p>Read more on Brainly.in - https://brainly.in/question/2120407#readmore</p> | |
| 1364. |
A coil with no current passing through it is suspended freely. It points to the east-westdirection. Explain, what will happen if a current is passed through the col? |
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| 1365. |
L Find the sum in each of the tollowing and thenAre both sums equal? if yes, then which property of addition do they show?0)519+ 1275check by reversing the order of the addends.(ii) 1636 +492 2, |
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| 1366. |
6:Calculate molality of a solution containing 207gm of K2CO3 dissolve in 500 ml ofsolution (Assuming density of solution is 1 gm ml 3).K-39,C-12,0-16 |
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| 1367. |
रु. 5. Discuss the verification of de-Broglie’s relation.e Tha da Denalsive it . |
| Answer» <p>Davisson and Germer Experiment, for the first time, proved the wave nature of electrons and verified the de Broglie equation. de Broglie argued the dual nature of matter back in 1924, but it was only later that Davisson and Germer experiment verified the results. The results established the first experimental proof of quantum mechanics.In this experiment, we will study the scattering of electrons by a Ni crystal.The experimental setup for the Davisson and Germer experiment is enclosed within a vacuumchamber. Thus the deflection and scattering of electrons by the medium are prevented. The main parts of the experimental setup are as follows:</p><p>Electron gun: An electron gun is a Tungsten filament that emits electrons viathermionicemission i.e. it emits electrons when heated to a particular temperature.</p><p>Electrostatic particle accelerator: Two opposite charged plates (positive and negative plate) are used to accelerate the electrons at a known potential.</p><p>Collimator: The accelerator is enclosed within a cylinder that has a narrow passage for the electrons along its axis. Its function is to render a narrow and straight (collimated) beam of electrons ready for acceleration.</p><p>Target: The target is a Nickel crystal. The electron beam is fired normally on the Nickel crystal. The crystal is placed such that it can be rotated about a fixed axis.</p><p>Detector: A detector is used to capture the scattered electrons from the Ni crystal. The detector can be moved in a semicircular arc as shown in the diagramabove.</p><p>The basic thought behind the Davisson and Germer experiment was that the waves reflected from two different atomic layers of a Ni crystal will have a fixedphase difference. After reflection, these waves will interfere either constructively or destructively. Hence producing a diffraction pattern.</p> <p>a(a-c) +b(c-a) +c(a-b) </p> | |
| 1368. |
11 Why do gases always tend to be less soluble in liquids as the temperatureis raised? |
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| 1369. |
94. A cylinder contains either ethylene or propyleneof 12 ml of gas required 54 ml oxygen forcomplete combustion. The gas is(a) Ethylene (b) Propylene(c) 1:1 mixture of two gases(d) 1:2 mixture |
| Answer» <p>Answer of this question is option (b)</p> <p>options no b is correct </p> | |
| 1370. |
Calculate volume of oxygen required for complete combustion of 0.25 dm of methane at STP. |
| Answer» <p>1 mol of methane requires 2 mol of oxygen for complete combustion. Thus 0.25 mol of methane requires 2 x 0.25 = 0.50 mol of oxygen. One mole of any gas occupies 22.4 dm3 by volume at STP</p> | |
| 1371. |
t three states in India where earthquakes are more lilkely to strike |
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| 1372. |
4.4m2.r diameter of a circults inner curved surface area,If the radius of the base of thear well is 3.5 m. It is 10 m deep Finde innerits inner curvecthe cost of plasterinf plastering this curved surface at the rate of 40 per ma a hotwater heating system, there is a cylindrical niheatin |
| Answer» <p>Curved surface area = 2 x pi x r x h= 2 x 3.14 x 1.75 x 10 = 110.25 m^2Cost = rate x area= 40 x 110.25 = 4410.</p> | |
| 1373. |
Why is the distance between stars expressed in light years? What do youunderstand by the statement that a star is eight light years away fromthe Earth? |
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| 1374. |
A star is 4.3 light years away from the Earth.What does it meanit. |
| Answer» <p>Ans :- A star is 4.3 light years away from the earth meansit is at a distance of4.3 light years away from the earth.</p> <p>hello sir what is guttation in plant</p> | |
| 1375. |
How does deforestation affect the environment |
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| 1376. |
The unique feature of Bryophytes compared to other green plant groups is that -(1) They produce spores(2) They lack vascular tisssue(3) They lack root(4) Their sporophyte is attached to gametophyte |
| Answer» <p>option 3. they lack root</p> | |
| 1377. |
(c)Villages (Rural areas) |
| Answer» <p>thank you mam</p> | |
| 1378. |
Fig. 10.38A, B, C and D are four points on acircle. AC and BD intersect at a point E suchthat BEC = 130° and < ECD = 20°. FindfIn Fig. 10.39. AD,っ |
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| 1379. |
find the value of x, y, z if x+y=0, -x+y=0, -2x-y-3z=0 |
| Answer» <p>wrong </p> <p>ans x=1y=1 z=-1</p> <p>She is correct.</p><p>If x and y are 1 then how is x+y = 0</p><p>Check the solution thoroughly :)</p> <p>plz ans my one more question </p> <p>plz fastly do it</p> <p>plz answer my one more question fastly </p> <p>plz do it fastly</p> | |
| 1380. |
if x+z=0, -x+y=0, -2x-y-3z=0 then find the value of x, y, z |
| Answer» <p>x=-zx=yhence y=-zin third equation-2(-z)-y-3z=0-z-y=0</p> | |
| 1381. |
(2M)f) What is the function of an amplifier? Explain? |
| Answer» <p>An amplifier is an electronic device that increases the voltage, current, or power of a signal. Amplifiers are used in wireless communications and broadcasting, and in audio equipment of all kinds. They can be categorized as either weak-signal amplifiers or power amplifiers</p> | |
| 1382. |
3-0 g of H2 react with 29-0 g of O2 yield H20.(i) which is the limiting reactant ?(ii) Calculate the maximum amount of H20 that(iii) Calculate the amount of one of the reactants which remain unreacted.can be formed.[Ans. (i) H2 (ii) 150 m |
| Answer» <p>The balanced equation for the above reaction is as follows:</p><p>2H2 + O2 = 2H2O</p><p>From the above equation it is clear that 2 mole H2 react with 1 mole O2</p><p>Molar mass of H2 = 2g</p><p>Molar mass of O2= 32 g</p><p>This implies, </p><p>4 g H2 react with 32 g O2</p><p>3 g H2 reacts with = (32/4) x 3g of O2 gas= 24 gAs the given amount of O2 is more than required therefore O2 is excess reagent and H2 is limiting reagent. </p><p>2 mole of hydrogen gas reacts to form 2 mole of water molecule therefore,4 g of H2 produces = 36 g of water So the amount of H2O produced by 3 g H2 = (36/4) x 3= 27 gHence, 27 g of water will be produced during the recation</p><p>As, 24 g of oxygen has been utilised during the recation and 29 g of oxygen was supplied therefore amount of oxygen gas left is (29-24) = 5g</p> | |
| 1383. |
3-0 g of H2 react with 29-0 g of O2 yield H20.G) Which is the limiting reactant?(ii) Calculate the maximum amount of H20 that can be formed.(iii) Calculate the amount of one of the reactants which remain unreacted.[Ans. (i) H2 (i) 1ac |
| Answer» <p>The balanced equation for the above reaction is as follows:</p><p>2H2 + O2 = 2H2O</p><p>From the above equation it is clear that 2 mole H2 react with 1 mole O2</p><p>Molar mass of H2 = 2g</p><p>Molar mass of O2= 32 g</p><p>This implies, </p><p>4 g H2 react with 32 g O2</p><p>3 g H2 reacts with = (32/4) x 3g of O2 gas= 24 gAs the given amount of O2 is more than required therefore O2 is excess reagent and H2 is limiting reagent. </p><p>2 mole of hydrogen gas reacts to form 2 mole of water molecule therefore,4 g of H2 produces = 36 g of water So the amount of H2O produced by 3 g H2 = (36/4) x 3= 27 gHence, 27 g of water will be produced during the recation</p><p>As, 24 g of oxygen has been utilised during the recation and 29 g of oxygen was supplied therefore amount of oxygen gas left is (29-24) = 5g</p> | |
| 1384. |
Balance the following reactions:\mathrm{Cu}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{CuSO}_{4}+\mathrm{SO}_{2} \mathrm{A}+\mathrm{H}_{2} \mathrm{C} |
| Answer» <p>3 CU + 4 HSO4 = 3 CUSO4 + 2 H2O + SO2</p> | |
| 1385. |
3. How can you show that water vapour is present in air? |
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| 1386. |
b) In the air around us water is present as(i) Oxygen(ii) Hydrogen(iii)Ozone(ivi water vapour |
| Answer» <p>watervapor </p> <p>Shure </p> <p>water vapour is correct answer </p> | |
| 1387. |
Which of the following components of air is present in the largest amount in the atmosphere?(a) Nitrogen(b) Oxygen(c) Water vapour(d) Carbon dioxide |
| Answer» <p>nitrogen is the answer of the following</p> <p>nitrogen because nitrogen are present in the air only 71%</p> <p>NITROGEN is the air present in the largest amount in the atmosphere</p> <p>Nitrogen is the right answer </p> <p>Nitrogen is the correct answer </p> <p>nitrogen is the correct answser </p> <p>nitrogen- 71 % is the correct answer of the given question </p> <p>nitrogen because it's 78%</p> | |
| 1388. |
C. Match the following.1. Irreversible change2. Condensation3. Meltinga) Water to water vapourb) Burning of paperc) Water vapour to waterd) Solid to liquid4. Evaporation |
| Answer» <p>1. burning of paper</p><p>2. water vapour to water</p><p>3. solid to liquid</p><p>4. water ti water vapour</p> | |
| 1389. |
S8l water into its vapour is called(b) The process of changing water vapour into water is called(c) No rainfall for a year nr morn |
| Answer» <p>Theprocess of changing water vapourintowateris called condensation.</p> <p>the procesd of changing water vapour into wateriscalled condonciation</p> | |
| 1390. |
Name the following compounds:A) CaBr2 |
| Answer» <p>Calcium Bromide CaBr2</p> <p>calcium bromide</p> | |
| 1391. |
Ekta earns R3000 in 10 days. How much will she earn in 30 days? |
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| 1392. |
How do we detect the smell of an agarbatti (incense stick)? |
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| 1393. |
what do we detect the small of an agarbatti(incense stick)? |
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| 1394. |
Describe the tests to detect the presence of carbohydrates in our food? |
| Answer» <p>Testing for the presence of starch (complex sugar) Lugol's reagent (iodine solution) changes from yellowish-brown to dark purple/black.</p><p>Testing for simple carbohydrates (monosaccharides and some disaccharides) Benedict's solution is used to test for simple carbohydrates.</p> <p> answer is so long and hard wording plz short answer and normal wording</p> | |
| 1395. |
13.The set of rational numbers Qis: |
| Answer» <p>The rational numbers can be expressed in the form of fraction : p by q</p><p>where q cannot be 0 , p and q both are integers.</p><p>Hence the representation of the set Q of rational numbers in the property form is represented by :</p><p>Q={p/q, where p &w belongs to Z and q not equal to 0}</p><p>Hence, this is the property form or the set builder notation of the set of rational numbers Q.</p> | |
| 1396. |
0.26 A particle is projected from a point O with a velocityu in a direction making an angle α upward with thehorizontal. After some time at point P it is movingright angle to its initial direction of projection. Thetime of flight from O to P is-0.29u cosec αusin α(A)gu tan αu sec α |
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| 1397. |
3)Which alternatives will you recommend for the chemical fertilizers in agriculture ? |
| Answer» <p>1. Sustainable agricultureis a type of agriculture that focuses on producing long-term crops and livestock while having minimal effects on the environment. This type of agriculture tries to find a good balance between the need for food production and the preservation of the ecological system within the environment. In addition to producing food, there are several overall goals associated with sustainable agriculture, including conserving water, reducing the use of fertilizers and pesticides, and promoting biodiversity in crops grown and the ecosystem. Sustainable agriculture also focuses on maintaining economic stability of farms and helping farmers improve their techniques and quality of life.2. Organic farming is a production system which avoids or largely excludes the use of synthetically compounded fertilizers, pesticides, growth regulators, genetically modified organisms and livestock food additives.</p> | |
| 1398. |
2. An example of chemical change is(a) dissolution of sugar in water(c) digestion of food(b) formation of clouds(d) cutting a wood log- |
| Answer» <p>a is the answer of the following</p> <p>a is a correct option</p> <p>option a is right because a chemical change occurs when sugar dissolves in the water</p> <p>a is the correct answer</p> <p>option a is the correct answer of the given question</p> <p>a is the right answer</p> <p>c is the right answer</p> | |
| 1399. |
a glass window does not form a shadow. why |
| Answer» <p>A glass window DOES form a shadow. Depending on the glass, there is always a degree of shadow produced, although your unaided eye may not be able to detect it. This is due to light being refracted, absorbed, or reflected by natural or man made impurities in the glass. </p> | |
| 1400. |
How did they replace the necklace? |
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