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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.
| 1701. |
C2H5OH + CH3Cooh |
| Answer» <p>C2H5OH + CH3COOH -> H2O + CH3COOC2H5</p> | |
| 1702. |
8. Chemical name of limewater is |
| Answer» <p>Calcium hydroxide (traditionally called slakedlime) is an inorganiccompoundwith thechemicalformula Ca(OH)2. It is a colorless crystal or white powder and is obtained when calcium oxide (calledlimeor quicklime) is mixed, or slaked withwater.</p> | |
| 1703. |
What is the chemical name for rust? |
| Answer» <p>Chemical namesforrustinclude iron oxide</p> | |
| 1704. |
7. Chemical name of washing soda is |
| Answer» <p>the chemical name for washing soda is sodium carbonate (Na2CO3)</p> | |
| 1705. |
14. A bullet of mass 10 g travelling horizontally with a velocity of150 m s1 strikes a stationary wooden block and comes to restin 0.03 s. Calculate the distance of penetration of the bulletinto the block. Also calculate the magnitude of the force exertedby the wooden block on the bullet. |
| Answer» <p>Data:mass of the bullet (m) = 10 g = (10/1000) kg =0.01 kgInitial velocity (u) = 150 m/sFinal velocity (v) = 0 m/sTime taken (t) = 0.03 sec</p><p>i. Calculation of the distance of penetrationof the bullet into the block: </p><p>Calculation of the distance of penetrationof the bullet into the block = Displacement</p><p>Displacement = average velocity × timeDisplacement = [(u + v) / 2] × timeDisplacement = [(150 + 0) / 2] × 0.03Displacement = 2.25 m</p><p>ii. Calculation of the magnitude of the force exerted by the wooden block on the bullet:the magnitude of the force exerted by the wooden block on the bullet = Retarding forceRetarding force = mass × reatardationRetarding force = mass ×[ (Intitial velocity - Final velocity) / t ]Retarding force = 0.01 ×[ (150 - 0) / 0.03 ] NRetarding force = [150/3] NRetarding force = 50 N</p> <p>thanks </p> | |
| 1706. |
1. What do you mean by free fall? |
| Answer» <p>free fall means to drop any object from upside down on that object gravity will work and it will free fall it means no need of any external spot in dropping</p> | |
| 1707. |
in travels with a speed of 60 km/h for 0-52 h, 30 ms or e 24and thentrain s→sioh for the next 0.71 h. What is the average speed ofthn trim? |
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| 1708. |
F. STATE TRUE OR FALSE1. Sodium hydrogen carbonate is the chemical name of baking soda2. Evaporation of water is a chemical change.3. Melting of wax and burning of candle both are similar changes4. Corrosion does not harm the iron objects. |
| Answer» <p>1. true2. false3. false4. false </p> <p>true , false, false, false is the correct answer of the given question</p> <p>truefalsefalsefalse</p> <p>1.true2.false3.false4.false</p> <p>true, false, false, false is the correct answer. </p> | |
| 1709. |
2.8:GAY LUSSAC'S LAW |
| Answer» <p>Gay Lussac's lawdefines the relationship between the pressure and temperature of a gas. According to thelaw, when volume is held constant, the pressure of an ideal gas is directly proportional to its temperature.</p> | |
| 1710. |
¡Write the chemical name of vinegar. |
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| 1711. |
what is the reaction of vinegar with baking soda.Explain briefly. |
| Answer» <p>The reaction between baking soda (sodium bicarbonate) and vinegar (dilute acetic acid) generates carbon dioxide gas, which is usedin chemical volcanoesand otherprojects. Here is a look at the reaction between baking soda and vinegar and the equation for the reaction.The chemical equation for the overall reaction is:</p><p>NaHCO3(s) + CH3COOH(l) → CO2(g) + H2O(l) + Na+(aq) + CH3COO-(aq)</p> | |
| 1712. |
5.08: 30 AMtshat in tha distance maved liy the nt,08:6 AM , theedametey sandig haschargtdlt |
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| 1713. |
Lightning and thunder take place in the sky at the same time and at thesame distance from us. Lightning is seen earlier and thunder is heardlater. Can you explain why?13. |
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| 1714. |
at theLightning and thunder take place in the sky at the same time andsame distance from us.Lightning is seen earlier and thunder is heardlater. Can you explain why? |
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| 1715. |
120+Go togZ7नर्यात की वैधृतशीलता* टेम क्या पते । |
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| 1716. |
1. Use Euclid's division algorithm to find the HCF of:6)135 and 225(ii)196 and 38220 |
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| 1717. |
he height of a person is 1.65 m. Express it into cm andmm. |
| Answer» <p>thanks </p> | |
| 1718. |
5.The height of a person is 1.65 m. Express it into cm and mm. |
| Answer» <p>1m=100cm1.65m=100*1.65=165cm</p><p>1m=1000mm1.65m=1000*1.65=1650mm</p> | |
| 1719. |
Ifx=9+bt+ct^2 where x is in meter and t is in seconds ,than what are the units and diamonds of a,b and c? |
| Answer» <p>x = a + b t + c t² , where x is in meter, and t is in seconds.</p><p>from the principle of homogenity of units. If the leftside of the eqaution is distance then right side terms must also be in meters. so 'a' should be a distance and b×t also be in distance. therefore a= metersb=distance/ time(m/s) unit of velocityc=m/s^2 which is the unit of acceleration </p> | |
| 1720. |
hy cells could not be observed before 17th century? |
| Answer» <p>The main reason was that the size of the majority of the cells are too small to be invisible to the unaided eye and at that time microscope was not discovered. So, the cell could not be observed before 17th century.</p> | |
| 1721. |
Can you think of how tapetal cells could become bi-nucleate? |
| Answer» <p>It provides nutrition to the developing microspores.Cellsof thetapetumpossess dense cytoplasm and generally have more thanonenucleus.Tapetal cells become bi-nucleateby multiplecellfusions of uninuclearcells(cellswith a single nucleus). Thus,tapetal cellsare syncitium (cellhaving more thanonenucleus).</p> | |
| 1722. |
A is made of thousands of criss- crossing threads forming anetwork |
| Answer» <p>A clothis made of thousands of criss-crossing threadsforming a network.</p> <p>tank somuch</p> | |
| 1723. |
3. How can government help the people suffering from a natural calamity? |
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| 1724. |
E. Answer the following.1. How can we help during a natural calamity? |
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| 1725. |
Find the conversion factor between S.I. unit andCGS unit of density. |
| Answer» <p>The SI unit of kilogram per cubic metre (kg/m3) and the cgs unit of gram per cubic centimetre (g/cm3) are probably the most commonly used units fordensity.1,000 kg/m3 equals 1 g/cm3. (The cubic centimeter can be alternately called a millilitre or a cc.)</p> | |
| 1726. |
अत अके लि B EREE T e e B B a8 "g i) e 20 0 B s s हैक Sg 88 (4 fl-‘"““ e s s B e o, g o e s sg in e |
| Answer» <p>hit like if you find it useful</p> | |
| 1727. |
A metal pipe is 77 cm long. The inner diameter of a crosssection is 4 cm, the outer diameter being 4.4 cm(see Fig. 13.11). Find its(i) inner curved surface area,(ii) outer curved surface area,(iii) total surface area.3.Fig. 13.11 |
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| 1728. |
Increase in oil production is(a) golden revolution (b) yellow revolution(c) white revolution (d) blue revolution(a) Friesw(c) Holste17. Exotic bre |
| Answer» <p>(b) yellow revolution</p><p>Explanation:Yellow revolution is the sudden increase in the production of edible oil due to the plantation of Hybrid oilseed like mustard, sesame, etc.</p> <p>what is blue revolution </p> | |
| 1729. |
7, A 1.2% solution of NaCl is isotonic with 7.2% solution ofglucose. Calculate the van't Hoff factor of NaCI. [Ans. 1.951 |
| Answer» <p>we have, as percentage of weight/volume = (wt. of solute/volume of solution)× 100</p><p>Therefore, wt. of glucose = 7.2 g ; volume of solution = 100 mL</p><p>For glucose : πexpor πN= {w/(m × V)} × ST [V in litre]</p><p>As, πexpor πN= (7.2 × 1000 × 0.0821 × T)/(180 × 100)</p><p>For NaCl πN= {w/(m × V)} × ST</p><p>= (1.2 × 1000 × 0.0821 × T)/(58.5 × 100)</p><p>As, two solutions are isotonic and hence,</p><p>πexpNaCl= πNglucose</p><p>Therefore, for NaCl : πexp/πN= 1 + α</p><p>Or, {(7.2 × 1000 × 0.082 × T)/(180 × 100)} × {(58.5 × 100)/(1.2 × 1000 × 0.082 × T)} = 1 + α</p><p>= i T</p><p>herefore, α = 0.95 & i = 1.95</p> | |
| 1730. |
lock is kept on the floor of an elevator at rest. Theelevator starts descending with an acceleration of12 m/s". Find the displacement of the block during thefirst 02 s after the start. Take g 10 m/s |
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| 1731. |
How many gram of protein do you need a day? |
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| 1732. |
॥ ॥१॥ पद को सभी पं.8.4 mH स्वप्रेरकत्व एवं 6 (2 प्रतिरोध वाली एककुण्डली को 12 V की बैटरी से जोड़ा गया है। वहसमय (लगभग) जिस पर कुण्डली में प्रवाहित धारा1.0 A है, होगा :(A) 500 सेकण्ड(B) 20 सेकण्ड(C) 35 मिली सेकण्ड(D) 1 मिली सेकण्ड |
| Answer» <p>iska answer (c) hoga</p> <p>Answer he B 20 second </p> <p>a 500 second is a right</p> <p>b is the correct answer of this question</p> <p>A is the correct options of the following question</p> <p>(500(options-A) is the correct answer of the following question</p> | |
| 1733. |
If one mole of carbon atomsweighs 12 grams, what is themass (in grams) of 1 atom ofcarbon? |
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| 1734. |
Write about the main works of Gram Panchayat. |
| Answer» <p>The Sarpanch, Members and Gram Sevak represent the voice and opinion of the village people on behalf of the Gram Panchayat to the Taluka and Zilla level by attending the meetings or sending the official records.</p><p>b. Regulatory and Administrative Functions:</p><p>1. This institute solving the disputes of village people as individual or groups.2. They control the behavior of people of people. Collect their opinion about various programmes.3. Gram Panchayat implements the official programme given by the authorities.4. Conduct regular meetings and keeps records for various departments.5. The measures are enforced for the desired safety and sanitation of the village people.</p> | |
| 1735. |
Fill in the blanks in the sentences1. In a panchayat the elected members are called ........2. The city is divided into several ..............4. Groups of councillors deal with issues that effect the ...... 3. In a municipal corporation the elected members are called ...... |
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| 1736. |
what are hard steel |
| Answer» <p>Hardened steelis a type of medium tohardplain carbonsteelthat has undergone heat treatment, quenching and further reheating. Components made ofhardened steelhave ahardexterior casing and a robust core, and include arbors, axles, link components, driving pinions, camshafts and cardan joints.</p><p>Like my answer if you find it useful!</p> | |
| 1737. |
8) Find outnu moho |
| Answer» <p>speed =distance / time=480/4=120km/hr120km/hr=(120×1000)/(60×60)=33.33m/s</p> | |
| 1738. |
A Substance x which is an oxide of a group 2 element is used intensively in the cement industry. This element is present in bones also. On treatment with water, it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved. |
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| 1739. |
1242.'Cornet' isA. Musical instrumentB. Group of honeybeesC. Similar to internetD. of the above |
| Answer» <p>A. Musical Instrument of the following question answer.</p> <p>Options A(musical Instrument) is the correct answer of the following question answer.</p> <p>a cornet is an instrument like a clarinet maybe short for it</p> <p>A because it's the opposite from a clarinet </p> <p>the answer is a ,because it's the abbreviation for a clarinet </p> <p>It is a musical instrument </p> <p>(a) option is the correct</p> <p>A.musical instrument</p> <p>option (a) is correct....</p> <p>cornet is musical instruments </p> <p>option (a) is correct.....</p> <p>option A.Musical instrument is the correct ans.</p> <p>Cornet is a modern musical instrument</p> <p>'Cornet' is a musical instrument. </p> <p>musical instrument is the following question answer</p><p>corner is an musical instrument </p> <p>Cornet is a musical instruments ................</p> <p>cornet is a musical instrument</p><p>cornet is the best answer</p> <p>option a musical instrument is the correct answer for the following question</p> <p>Cornet is a musical instrument </p> <p>A.musical instrument is correct answer</p> | |
| 1740. |
21Discuss briefly different types of negative interactions amongthe organisms.(c) |
| Answer» <p>1</p> <p>2</p> <p>3</p> <p>4</p> <p>5</p> <p>6</p> <p>7</p> <p>thank you</p> | |
| 1741. |
Q U E S T I O N SDefine I dioptre of power of a lens |
| Answer» <p>When the focal length of a lens is 1 m then the power of lens is called 1 dioptre.</p> | |
| 1742. |
which scientist named matter |
| Answer» <p>At that time, the atom was thought to be 'the building block of matter.' In 1911, a scientist named Ernest Rutherford discovered that atoms are really made of a positively charged center called the nucleus orbited by negatively charged particles called electrons electrons.</p> <p>Ernest Rutherford .....</p> | |
| 1743. |
Q.1.What are sex hormones? Why are they named so? State their functions. |
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| 1744. |
3charges q, q, 2q present at the corner of equilateral triangles and each side is L then find the electric dipole moment |
| Answer» <p>Consider similar type of query </p> <p>do we get to pay for providing answers here ?</p> | |
| 1745. |
9. A cricket ball is dropped from a height of 20 metres.(a) Calculate the speed of ball when it hits the ground.(b) Calculate the time it takes to fall through this height. (g 10 m/s) |
| Answer» <p>Initial velocity is 0 .. ( since it is just dropped)</p><p>now using V²= u² +2gh => (Vfinal)² = 0+2*10*20=> v² = 20*20 = 400=> v = √400 = 20m/s</p><p>for time takenuse V = u+gt => t = V/g = 20/10 = 2sec</p> | |
| 1746. |
Long answer questions:1. What do you mean by control andcoordination in animals? |
| Answer» <p>All the living organisms respond and react to changes in the environment around them.• The changes in the environment to which the organisms respond and react are called stimuli such as light, heat, cold, sound, smell, touch etc.• Both plants and animals respond to stimuli but in a different manner. Control and Coordination in Animals It is brought about in all animals with the help of two main systems :(a) Nervous system(b) Endocrine system</p> | |
| 1747. |
D. The bryophyte which can absorb water upto 18 times its weight-(1) Anthoceros(2) Sphagnum(3) Davsonia(4) Marchantia |
| Answer» <p>Sphagnumthat generally grows in bogs are slightly antiseptic andcan absorb large amount of wateri.e., upto 18 times its weight. On account of these properties they may be used for filling absorbent bandage in place of cotton, in the hospitals. The plants absorb and hold water in them. For these properties they are used in seed beds and green houses to root cuttings. They are also used to maintain high soil acidity required by certain plants.</p> | |
| 1748. |
5) Write adaptation of House lizards ? |
| Answer» <p>Adaptations are body parts or behaviors that help living things survive in an environment. Lizards, a type of reptile, have many physical and behavioral adaptations that help them survive in hot, dry places, avoid predators and find food. Lizards' adaptations include sharp claws, camouflage and basking.</p> <p>Adaptationsare body parts or behaviors that help living things survive in an environment.Lizards, a type of reptile, have many physical and behavioraladaptationsthat help them survive in hot, dry places, avoid predators and find food.Lizards'adaptationsinclude sharp claws, camouflage and basking.</p> | |
| 1749. |
The heat evolved in the combustion of benzeneis given by the equation15CHlg) O, (g)-6CO,(g) +3H,Ol),AH -3264.6 kJ mol-1, The heat energy changewhen 39 g of e burnt in an open containerwill be:(1) + 816.15 kJ mol-1 (2) 1632.3 kJ mol-13-1632.2 kJ mol1 (4)-2448.45 kJ mol-1 |
| Answer» <p>ty so much mam</p> | |
| 1750. |
Find three consecutive positive even integers whose sum is 90. |
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