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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.
| 1. |
The bottom of a cooking utensil is paintedGive the reason. |
| Answer» <p>The bottom is painted black because black colour is a good conductor of heat. This helps the food get cooked quickly.</p><p>Please hit the like button if this helped you. </p> | |
| 2. |
tan 3xcos r+ cos 2x + cos 5 |
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| 3. |
A body constrained to move along the z-axis of a coordinate system isconstant force F given byF=-\hat{i}+2 \hat{j}+3 \hat{\mathbf{k}} N |
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| 4. |
d. A stone thrown vertically upwards witinitial velocity u reaches a height 'h'before coming down. Show that thetime taken to go up is same as the timetaken to come down. |
| Answer» <p>Let us consider an object which is projected vertically upwards with initial velocity u which reaches a maximum height h.</p><p>Acceleration due to gravity=-g</p><p>Equation of Motion for a body projected thrown upwards :</p><p>V=u-gt----------(1)h=ut-1/2gt² -----------(2)v²-u²=-2gh --------(3)</p><p>Equations of motion for freely falling body :for free fall :Initial velocity=u=0g=gV=gt----------(4)h=1/2gt²-------(5)v²=2gh------(6)</p><p>Time of Ascent is the time taken by body thrown up to reach maximum height hAt maximum height , V=0</p><p>Equation (1) turns to u=gt1</p><p>t1=u/g ----------(7)Maximm height h=u²/2g ----------(8)</p><p>Time of descent : After reaching maximum height , the body begins to travel downward like free fall</p><p>so equation (5) h=1/2gt₂²t₂²=2h/gt₂=√2h/gbut from equation (9)t₂=√2xu²/2g²t₂=u/g -----------------equation (10)</p><p>∴t₁=t₂</p><p>The time ascent is equal to time of descent in case of bodies moving under gravity.</p> <p>thank you</p> | |
| 5. |
d. A stone thrown vertically upwards withinitial velocity u reaches a height 'h'before coming down. Show that thetime taken to go up is same as the timetaken to come down. |
| Answer» <p>projected vertically upwards with initial velocity u which reaches a maximum height h.Acceleration due to gravity=-gEquation of Motion for a body projected thrown upwards :V=u-gt----------(1)h=ut-1/2gt² -----------(2)v²-u²=-2gh --------(3)</p><p>Equations of motion for freely falling body :for free fall :Initial velocity=u=0g=gV=gt----------(4)h=1/2gt²-------(5)v²=2gh------(6)Time of Ascent is the time taken by body thrown up to reach maximum height hAt maximum height , V=0</p><p>Equation (1) turns to u=gt1t1=u/g ----------(7)Maximm height h=u²/2g ----------(8)</p><p>Time of descent : After reaching maximum height , the body begins to travel downward like free fallso equation (5) h=1/2gt₂²t₂²=2h/gt₂=√2h/gbut from equation (9)t₂=√2xu²/2g²t₂=u/g -----------------equation (10)∴t₁=t₂The time ascent is equal to time of descent in case of bodies moving under gravity.</p> <p>projected vertically upwards with initial velocity u which reaches a maximum height h.Acceleration due to gravity=-gEquation of Motion for a body projected thrown upwards :V=u-gt----------(1)h=ut-1/2gt² -----------(2)v²-u²=-2gh --------(3)</p><p>Equations of motion for freely falling body :for free fall :Initial velocity=u=0g=gV=gt----------(4)h=1/2gt²-------(5)v²=2gh------(6)Time of Ascent is the time taken by body thrown up to reach maximum height hAt maximum height , V=0</p><p>Equation (1) turns to u=gt1t1=u/g ----------(7)Maximm height h=u²/2g ----------(8)</p><p>Time of descent : After reaching maximum height , the body begins to travel downward like free fallso equation (5) h=1/2gt₂²t₂²=2h/gt₂=√2h/gbut from equation (9)t₂=√2xu²/2g²t₂=u/g -----------------equation (10)∴t₁=t₂The time ascent is equal to time of descent in case of bodies moving under gravity.</p> | |
| 6. |
-. Givetelationbetu eenvelo city-+-frequency-andWavelength of light |
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| 7. |
3. Why the banana "tree" is a herb? |
| Answer» <p>The banana plant is called a 'banana tree' in popular use, but it's technically regarded as a herbaceous plant (or 'herb'), not a tree, because the stem does not contain true woody tissue.</p> <p>tell it expandly</p> | |
| 8. |
All seeds do not germinate. Why? |
| Answer» <p>Extremes of watering also causegerminationfailures. After sowingseeds, either indoors or outdoors, it is important to press the soil firmly so that theseedscome into close contact with the soil. ... Sometimes whenseedfails togerminateit's because you have sown poorseed.</p> | |
| 9. |
show that pollen grains,need sugar to germinate |
| Answer» <p>1). Let us take a little amount (10-15 parts) of sucrose solution in apetridish. 0.01 % sodium borate solution is then mixed with sucrose solution.</p><p>2). On this mixture a good amount of fresh pollen grain is then spread over. In this condition the set is left for one day.</p><p>Repeat the above steps without the sucrose solution.We will observe growth of pollen tube in the sample with sucrose solution and not in the absence of sucrose solution.</p> | |
| 10. |
Answer the following in one sentence1. What do seeds need to germinate? |
| Answer» <p>germination can be defined as the growth of a seed into a young plant or a seedling.A seed germination is a process by which a different plant species grow from a single seed into a plant. A common example of seed germination is the sprouting of a seedling from a seed of an angiosperm or gymnosperm.</p> | |
| 11. |
CLASS 6A. Write one word for the following.1. The process of soaking seeds, draining the water, and leaving them untouched tillthey germinate ........... |
| Answer» <p>The process of soaking seeds, draining the water, and leaving them untouched till they germinate sprouting </p> | |
| 12. |
2 12) Which of the following plants havetap root system?A) BalsamB) GrassC)0 MaizeDO Wheat |
| Answer» <p>(b) Grass, is the right answer</p> <p>c is correct answer for tap root</p> <p>c) is the correct answer </p> <p>option c is the correct answer of the given</p> <p>c) Maize have tap root system</p> <p>correct answer APlant like balsam show tap root system. The main root is larger grows vertically downwards.</p> | |
| 13. |
PloughingWheat, gram3. WeedingPea, gram5. Paddy, maizea. kharif cropsb. legume cropsc. loosening and turning of soild. rabi cropse. removal of unwanted plants |
| Answer» <p> 54123 this is right</p> <p>54123is in the right side</p> | |
| 14. |
A ball is thrown vertically upwards and return to thrower after 6 seconds. Find(a) The velocity with which it was thrown up.(b) The minimum height it reaches.(c) Its position after 4 sec. |
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| 15. |
What are synthetic fibres? Give three examples. |
| Answer» <p>the fibres obtained from chemicals by hand make example nylon,rayon,</p> <p>Synthetic fabrics are textiles made from man-made rather than natural fibers. Examples of synthetic fabrics includepolyester, acrylic,nylon,rayon, acetate,spandex,lastex,orlonand Kevlar. Synthetic (chemically produced) fabrics are made by joining monomers intopolymers, through a process called polymerization.</p> <p>Fibres that are made from chemicals are called synthetic fibres. For example=Rayon, polyester, etc. </p> <p>The fibre which are made from chemical substance. E.X.- acrilyc ,polyester , nylon</p> | |
| 16. |
1. What is energy? Explain with three examples. |
| Answer» <p>Energyexists in many different forms.Examplesof these are: lightenergy, heatenergy, mechanicalenergy, gravitationalenergy, electricalenergy, soundenergy, chemicalenergy, nuclear or atomicenergyand so on</p> | |
| 17. |
9. Explain why there is a need of variety of animals and plants in a forest.10. In Big 17 15 tho |
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| 18. |
3. Why do we often sneeze when we inhale a lot of dust laden air? |
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| 19. |
3. Why do we often sneeze when we inhale a lot of dust-laden air? |
| Answer» <p>Sneezing expels the foreign particles from the inhaled air, so that only clean air entersour body. It usually occurs because of the irritation in the upper breathing passage. Thisirritation happens when we inhale some unwanted particles and they get trapped in ournasal cavity. Smoke, dust, pollen, etc. are some of the unwanted particles that maycause sneezing.</p> | |
| 20. |
A distance cover 100 meter in so busCalcute the average sbud |
| Answer» <p>Speed=distance/time=100m/50*3600sec=100/180000=1/1800 m/s=.0005m/sec</p> | |
| 21. |
Derive the formula for the work done per unit volume in stretching a wire |
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| 22. |
Q27. Name the priceQ28. Which part of the sheep has wool?Indinn hreed of sheep that produces good quality wool. |
| Answer» <p>the skin of sheep has wool </p> <p>sheep hair are used as wool</p> <p>sheep has wool because we are all using a wool over there is something we can get you can do that with a wool over here for you can do it again</p> <p>mainly the back part of the sheep has wool</p> <p>The skin of sheep have wool. </p> <p>The skin of sheep have wool. </p> | |
| 23. |
about sheep information |
| Answer» <p>sheep's are herbivores and prefer grass and leaves.there are also feed on a mixture of pulses,oilcakes and minerals.during winter they are kept indoor.they are fed on dry fodder and grains</p> | |
| 24. |
11. Match the following (column I with column II)Column I(a) Chlamydomonas(b) Cycas(c) Selaginella(d) SphagnumColumn II(i) Moss(i) Pteridophyte(iii) Algae(iv) Gymnosperm12. Describe the important characteristics of gymnosperms. |
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| 25. |
9. Match items in Column I with those in Column II:Column I(a) Bud(b) Eyes(c) Fragmentation(d) Wings(e) SporesColumn II(i) Maple-(ii) Spirogyra(iii) Yeast(iv) Bread mould(v) Potato(vi) Rose |
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| 26. |
Write any two functions of leaves |
| Answer» <p>Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which open and close. They regulate carbon dioxide, oxygen, and water vapour exchange with the atmosphere.</p> | |
| 27. |
stomata? Give two functions of stomata |
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| 28. |
6.What are stomata? Give two functions of stomata. |
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| 29. |
Natural disaster:udn quaAeContact number:.LOXn our daily life, we use broadcast mediums and instruments of informationand communication. Write any one advantage and disadvantage of it.(2 Marks)advantage:disadvantage:Baseline Test: 2018-19: Standard- Seven : Subject- General Science : (11) |
| Answer» <p>Advantages </p><p>• Wide geographic coverage & broad audience reach (appeals to most demographics)</p><p>• Perceived accountability with well accepted audience</p><p>• Relative ease of buying and post-buy maintenance</p><p>• Proven Success record for promoting mass consumer products (infomercials)</p><p> Disadvantages:</p><p>• Audience share is generally declining due to fragmented audiences</p><p>• Increasing use of DVR’s diminishing the impact of commercials (people can record their shows and skip the commercials)</p><p>• Typically high CPM costs and rising production costs (most expensive)</p><p>• Many television shows skew older and lower income</p><p>• increasing ad clutter as commercial pods lengthen (people don’t want to watch commercials because they are taking more time away from their shows)</p> | |
| 30. |
the one gelAcuot3. Identify the substances that are oxidised and the substancesthat are reduced in the following reactions. |
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| 31. |
14. What is a neutralisation reaeuon15. Give two important uses of washing soda and baking soda. |
| Answer» <p>Two important uses of washing soda(i) It is used in the manufacture of soap and glass.(ii) It is used to remove the permanent hardness of water.</p><p> Two important uses of baking soda(i) It is used for making the baking powder which is used to make bakery items soft and fluffy.(ii) It is used in soda- fire extinguishers.</p> | |
| 32. |
3. Give two examples ofeach:a Uses of solar energy |
| Answer» <p>As heat formakinghot water, heating buildings, andcooking.</p><p>To generate electricity with solar cells or heat engines.</p><p>To take the salt away from sea water.</p><p>To use sun rays for drying clothes and towels.</p><p>It is used by plants for the process ofphotosynthesis</p> <p>1: it is used to dry clothes.2:Used to produced light and hot water.</p> | |
| 33. |
D. Long answer questions1. List some properties of acids and bases.2. Give any three examples of acids. Give any two uses of each of them.3. Give any three examples of bases. Give any two uses of each of them.4. What is the effect of sulphuric acid on the following?(a) Red litmus(b) Blue litmus(c) Phenolphthalein5. Explain the following:(a) Calamine lotion is applied on bee stings.(b) Antacids are taken in case of acidity in stomach.(c) Slaked lime is added to factory waste before it is discharged into rivers. |
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| 34. |
List the advantages and disadvantages ofsynthetic fibres. |
| Answer» <p>Advantages.... 1- They do not shrink. 2- They are quick drying and need very little or no ironing. 3- They last longer as compared the fabrics made from natural fibres. Disadvantages... 1- Synthetic fibres do not absorb water or sweat. In hot and humid weather therefore the clothes made of synthetic fibre stick to the body and make the wearer uncomfortable. 2- Synthetic fibres melt and burn easily. 3- Synthetic fibres on catching fire shrink forming beads which stick to the skin. Therefore it is not advisable to use clothes made from synthetic fibres while working near flam/fire, such as,in kitchen. 4- Synthetic fibres are nonbiodegradable . Therefore they cause soil pollution.</p><p>Read more on Brainly.in - https://brainly.in/question/366449#readmore</p> | |
| 35. |
THE FUNDAMENTAL UNIT OF LIFE |
| Answer» <p>Cells are called the structural and functional unit of life because all the living organisms are made up of cells</p> | |
| 36. |
Q7) Two identical resistors, each of resistance 20 Ω are connected (i) in parallel (ii) in series, in turn,to a battery of 10 V.Calculate the ratio of power consumed in the combination of resistors in tihe twocases. |
| Answer» <p>In series combination</p><p>Net resistance, Rs= R1+ R2= 20+20 = 40 Ω</p><p>Power consumed = P1= V2/Rs--------(1)</p><p>In parallel combination</p><p>Net resistance, Rp=R1R2/R1+R2= 20 x 20 /20+20 = 10 Ω</p><p>Power consumed = P2= V2/Rp ----------(2)</p><p>Now ratio of the power consumed:</p><p>P1/P2= Rp/Rs</p><p>P1/P2= 10 / 40 = 1/4</p> | |
| 37. |
1. Name a gaseous mixture containing oxygen. |
| Answer» <p>The air in our atmosphere is a gaseous mixture which contains oxygen.</p> | |
| 38. |
* (9) The velocity of a car increases from54 km/h to 72 km/h. If the mass of the car is1500 kg, find the work done to increase thevelocity |
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| 39. |
fY oN3. An aeroplane isflying due north with a velocity of 90blowing from east with avelocity of 15 km h1, find the resultant velocity ofthe aeroplane. Ans. 91.24 km h-1,9° 28 W of Nkm h-1, If the wind be blowing from east with |
| Answer» <p>thanks</p> | |
| 40. |
1 Fill in the blanksMost liquids that conduct electricity are solutions ofand(b) The passage of an electric current through a solution causeseffects.c) If you pass current through copper sulphate solution, copper getsterminal of thedeposited on the plate connected to thebattery.The process of depositing a layer of any destred metal on anothermaterlal by means of electricity is calleddy |
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| 41. |
Example 1.6 A car accelerates uniformly from 18 km h-1 to 36 km h-1 in S(i) the acceleration and (ii) the distance covered by the car in that time. |
| Answer» <p>Acceleration = Change in Velocity/Time Change in Velocity = 36-18 = 18 km/h=5 m/s Time= 5 Seconds Acceleration = 5/5= 1 m/s2 </p><p>Equation of motion,s=ut+(1/2)at2 u=18 km/h=5 m/s t=5 s a=1 m/s2 s= (5*5)+(1/2*1*5*5) s=25+12.5 i.e., s=37.5 m </p> <p>hit like if you find it useful</p> | |
| 42. |
4. Classify the following into chemical combination, decompositiondisplacement and double displacement reaction.Cao+co,f b) 2Ag NO,+ Cu Cu(NOJ+ 2Agd) NaCl + AgNO AgCl +NaNOa) Caco, heat |
| Answer» <p>a)decomposition reactionb)combination reactionc)single double displacement reactiond)double displacement reaction.</p> | |
| 43. |
4. Classify the following into chemical combination, decomposition,displacement and double displacement reaction.a) CaCO, heat Cao + co,1 b) 2Ag NO,+ Cub 2SO2 + O2Cu(NO)+2Ag |3/2d) NaCl + AgNO3AgCl +NaNO |
| Answer» <p>a) decomposition reactionb) combination reactionc)single displacement reactiond)double displacement reaction</p> | |
| 44. |
J. A car moves with a speed of 40 km/h for 15 minutes and then with aspeed of 60 km/h for the next 15 minutes. The total distance covered bythe car is: |
| Answer» <p>what we have to find </p> <p>nice question mind blowing bro</p> <p>one hundred kilometres distances covered by the car</p> <p>25 kilometres coverd by the car</p> <p>25 km/h is the correct answer. </p> <p>100km/h for 30 minutes</p> | |
| 45. |
Vil1(x+2)x-3x+5 = 6 , x3,-5 |
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| 46. |
U NU UI LA2. The silkworm is (a) a caterpillar, (b) a larva.(i) a (ii) b (iii) both รก and b (iv) n3. Which of the following does not yield wool?(1) Yak (i) Camel (iii) Goat (iv) Woolly4. What is meant by the following terms?(1) Rearing (ii) Shearing (iii) SericultureGiven below is a sequence of steps in the processithe missing steps? Add them.Shearingsorting6Make sketches of the two stages in the life history a |
| Answer» <p>both a and bcamelis correct</p> <p>both a and bcamelis correct</p> | |
| 47. |
economic importance of green algae |
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| 48. |
Q.8Which of the following vector can't be equal to theresultant of 5 and 10(1 2[3] 7121 5[41 8andconlacement cannot |
| Answer» <p> the resultant can be in between 5 to 15. so option 1 can never be the resutant of these two vectors.</p> <p>which of the following vector can't be equal to the resultant of 5 and 10. it's #1</p> | |
| 49. |
B-3.A block of volume V and of densityis placed in liquid of density σ(o? σ), then block is movedupward upto a height h and it is still in liquid. The increase in gravitational potential energy of the blockIS(A) ơbvgh(C) (ab-a)Vgh(D) none of these |
| Answer» <p>Option B is correct according to principal of effluxes.</p> | |
| 50. |
Given a second pendulum having a time period of 2 seconds. What changes will you maketo reduce its time period? |
| Answer» <p>as time period is 1/2π√l/g hence we can't change g but length can be changed</p> | |