Explore topic-wise InterviewSolutions in Science.

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.

101.

write three points about real image

Answer» <p>1. In optics, a real image is an image which is located in the plane of convergence for the light rays that originate from a given object</p><p>2. Thereal imageimplies the representation of an actual object, produced when the light rays arising from a single source converge at a particular (real) point3. inverted image is formed</p>
102.

What is difference between noise and music .

Answer» <p>Thank you</p>
103.

20 Whatarevill? Whattheirlocationandfunction?

Answer» <p>These are small finger like projection and they are found on the inner wall of intestine</p> <p>these are small finger like projection and they are found on the inner wall of intestine </p>
104.

describe pinhole camera

Answer» <p>Ans :- Apinhole camerais a simplecamera without a lens but with a tiny aperture, a pinhole– effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as thecamera obscura effect.</p>
105.

11.3 A PINHOLE CAMERAYou might think that we need a lot

Answer» <p>A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.</p>
106.

Adhy the image in pinhole.carmena inuerted

Answer» <p>It is because light travels in straight line : The light travels from the top of the tree , straight through the pinhole camera, straight to the bottom of the image. The common single lens reflex [SLR] camera uses a pentaprism to “bounce” this inverted around and make it appear upright</p>
107.

20.5. Compare pinhole image with the shadow of some objects.

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108.

5. Convert 60 °C to degree Fahrenheit.5. Convert 500 mm into m, cm and km.. 1350 g into kg..3 m 2 cm into cm.

Answer» <p>(8) 3×100cm+2cm=302cm(7) 1350/1000kg=1.35kg(6) 500/1000m=0.5m=50cm=0.0005km(5) 9/5(60) +32=140•F</p> <p>140°F is the correct answer </p> <p>140°F is the correct answer</p>
109.

powu(a) 100 WTwo conducting wirare first connecdifference. The r(a) 1:2(b) 75 W1050 W (d) 25 Wducting wires of the same material and of equal lengths and equal diameters+ connected in series and then parallel in a circuit across the same potentialmee The ratio of heat produced in series and parallel combinations would be(b) 2:1fet 1:4(d) 4:1

Answer» <p>it would be 1:4 because the heat produced in the material connected in parallel will always be the four times connected in series</p> <p>she is the answer of this question because it is marked by</p> <p>answer c both are correct answers only </p>
110.

5. A solid is dissolved in water. How will you get thesolildbackfrom

Answer» <p>If your mixture is a solution, such as saltywater, then filteringwillnot separate the salt from thewater. Instead, by heating the soluton the solvent (water) evaporates leaving thesolid(salt) behind. This is possible since the two substanceshavedifferent boiling points.</p>
111.

Long answer type questions.(a) State the functions of skeleton.

Answer» <p>Theskeletal systemperforms vital functions — support,movement,protection,blood cell production,calcium storageandendocrineregulation — that enable us to survive.</p> <p>The function of the skeleton is as follows:</p><p>Support:It supports ligaments, tendons and organs in doing their jobs, and ensures all of those structures don’t fall apart</p><p>Protection:It protects internal organs</p><p>Movement:If it weren’t for bones, muscles wouldn’t be able to move anything, as it’s bones they tug on in order to move our bodies around!</p><p>Breathing:This is a very underestimated function of the skeleton. The ribs, clavicles and sternum move alongside the lungs and helps the lungs expand and contract</p><p>Production of red blood cells:The bone marrow of large bones create red blood cells to be put into the circulation</p><p>Storage of minerals:Bones store minerals like calcium and hydroxylapatite</p><p>Endocrine regulation:Calcium homeostasis/regulation is largely dependent on bones as they serve as a reservoir for calcium. And when blood calcium levels are low, parathyroid hormone is released from the parathyroid gland which causes calcium to move from bones to blood. This is a simplification of calcium homeostasis but is good enough!</p>
112.

Long Answer Type Questions29. What are 'food producers' and 'food consumers' ? Give one example of each type.

Answer» <p>Producers are organisms that make their own food; they are also known as autotrophs. They get energy from chemicals or the sun, and with the help of water, convert that energy into useable energy in the form of sugar, or food. The most common example of a producer are plants. Through a process called photosynthesis, green plants use sunlight and water and make a type of sugar called glucose. Green plants such as trees are found on land, but they can also exist underwater as long as there is enough sunlight.</p><p>Consumers are organisms that need to eat (i.e. consume) food to obtain their energy. These organisms are called heterotrophs, meaning they must eat something else (hetero) as food. When we think of things eating for energy, our minds probably drift to animals, like birds, cats, or insects. These are all examples of consumers, but there are other lesser-known ones as well.</p> <p>Food producer=they make their own foodFood consumers=organisms that need food to eat and depends on other for food</p> <p>food producers are those who are dependent on anyone for their food for eg plants and food consumers are those who are dependent on plants for food for example human beings</p> <p>Food producers = They prepare their food by themselves</p><p>Food consumers = They prepare their food by depending on others</p>
113.

We know that v=IR if I is constantV proportional RIs it correct?if not why?

Answer» <p>V is proportionalto I iswhen Ris aconstant. Similarly, P =V*I is valid throughout. Cases whereVis inverselyproportionalto I iswhenP is aconstant. Originally Answered: P=VI means the current is inverselyproportionalto voltage, but from Ohms law theV=IRcurrent is directlyproportional.</p><p>So, the statement is false </p>
114.

5. For a gaseous reaction. A(g)+38(g)()+3D(g)ΔΕ is 17 Kcal at 27°C assuming R-2 cal K-1 mor, the value of ΔΗ for the above teac(A) 15.8 KcalWhich ofthe following statements is correct for the reaction; CO(g) + %O2(g) +CO(B) 18.2 Kcal(C) 20.0 Kcal(D) 164K6.

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115.

1. For the symbol H.D and 1tabulate three sub-atomicparticles found in each of them.

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116.

7. Six particles are situated at the corners of a regular hexagon of side aand each particle move with a constant speed v in a direction towardsthe particies at the next corner. Calculate the time the particls will taketo meet each other.

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117.

22. Examples of plant fibres are_and23. The process of removing hair from the body of sheep is called24. The rearing of silkworm for obtaining silk is called25. The process of taking out threads from the cocoon is called

Answer» <p>22-jute and cotton23-shearing24-sericulture25-reeling</p> <p>jute and cotton shearing sericulture</p>
118.

1. Fill up the blanks in the following(a) The process of changing of water into its vapour is called(b) The process of changing water vapour into water is called

Answer» <p>1. vaporization</p><p>2. condensation</p>
119.

3Describe how coal s formed from dead vegetation. What is this processcalled?

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120.

86-[15x 7(6x -9)- 2(10x-5(2-3xi

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121.

2 \operatorname { cos } \frac { \pi } { 13 } \operatorname { cos } \frac { 9 \pi } { 13 } + \operatorname { cos } \frac { 3 \pi } { 13 } + \operatorname { cos } \frac { 5 \pi } { 13 } = 0

Answer»
122.

10. What are the factors which contribute to the development of cyclones ?

Answer» <p>Sea surface temperatures warmer than 79 degrees Fahrenheit (26 degrees Celsius)</p><p>Low vertical wind shear</p><p>Warm moist air</p><p>Ocean area along the projected storm track</p>
123.

in that region.(c) No rainfall for a year or more may lead to(d) Excessive rains may cater

Answer» <p>draught is the answer</p> <p>what is the answerplease repli</p> <p>no rainfall for a year or more lead to drought in the region</p>
124.

Name three liquids, whichhwhen tested in the mannershown in Fig. 14.9, maycause the magnetic needleto deflect.

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125.

aarkame three liquids, which when tested in a manner shown in figurebelow, may cause a magnetic needle to deflect?(NLiquid

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126.

We can get the smell of perfume sitting several metreslaway.

Answer» <p>The perfume molecules spread out or 'diffuse' through the air. The smell becomes lessconcentratedbut it reaches a great distance - meaning you can smell it from relatively far away. </p><p>When a perfume issprayedseveral metres away from the source, the particles of the perfumediffuseswith the particles of the gas</p>
127.

Give reason why we can get smell of perfume sitting several meters away ?

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128.

199. The normal duration of

Answer» <p>Duration. For humans, the entire process of spermatogenesis is variously estimated as taking 74 days (according to tritium-labelled biopsies) andapproximately 120 days(according to DNA clock measurements). Including the transport on ductal system, it takes 3 months.</p>
129.

30. (a) Explain the term 'fertilisation'b) Give some examples of different modes of fertilisation in nature(0) What type of fertilisation takes place in (i) fish, and (in) birds?

Answer» <p>Fertilization:The process of combining the male gamete, or sperm, with the female gamete, or ovum. The product offertilizationis a cell called a zygote.</p> <p>a) The fusion of male and female gamete to form zygote during sexual reproduction is called fertilisation. (b) Internal and external fertilisation. (c)(i) External fertilisation. (ii) Internal fertilisation</p>
130.

y 7 \times 11 \times 13 + 13 \text { and } 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 + 5

Answer» <p>7×11×13 + 13so13 (77+ 1)so there are two factors so they are composite</p><p>5 ( 7×6×4×3×2 +1)so they are two factors so it is a composite number</p>
131.

3. Name three tiqtds, whichwhen tested in the mannershewn in Fig. 14.9, mayeause the magnetle needleto deflect.Fig. 14.9

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132.

When the free ends of a tester are dipped into a solution, the magneticneedle shows deflection. Can you explain the reason?

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133.

15. Multiple choice Questions:a. Which of the following has a taproot?i. Maizeii. Wheatili. Peaiv. Rice

Answer» <p>Pea plant has a tap root.It is a dicot plantAns: iii</p>
134.

2."bivereasonsforthefollowingobservationThe smell of hot sizzling foodreaches you several metresaway, but to get the smell fromcold food you have to go close

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135.

drop of olive oil of radius 0.25 mm spreads into a circular film of radius 5 cm on trface. Estimate the molecular size of the olive oil.

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136.

health benefits of eating sprouted grains

Answer» <p>Health benefits of sprouted grains: 1. They're lower in carbs. Turns out that the starchy carbs in the endosperm are converted into energy for the germ to form the sprout, so the resulting sprouted grain has a higher ratio of protein to carbs.</p><p>2. Sprouted grains are easier to digest. According to the Whole Grains Council, the enzyme activity of sprouted grains helps to transform the endosperm's starchy carbs into smaller, simpler components that are more easily digested.</p><p>3. Greater concentration of nutrients. Sprouting has been shown to increase the concentration of a grain's key nutrients, including protein, fiber, antioxidants, B vitamins, vitamin C, and folate.</p> <p>please give me like Sir</p> <p>Thank you </p> <p>Health Benefits of SproutedWhole Grains. Sprouting grains increases many of the grains' keynutrients, includingB vitamins,vitamin C,folate,fiber, and essential amino acids often lacking in grains, such as lysine. Sprouted grains may also be less allergenic to those with grainproteinsensitivities.</p>
137.

6. Over eating fat rich food leads to

Answer» <p>A dietrichin saturatedfat(fatty cuts of meat and dairyfoodsare top sources) can raise cholesterol levels in the blood. That increases the risk for heart disease. ... Ifeating too much fat causesyou to become overweight or obese, this raises your risk of endometrial, breast, prostate and colorectal cancers.</p> <p>over eating fat rich food leads to obesity. </p> <p>over eating fat rich food leads to obesity</p> <p>Over eating fat rich food may leads to Obesity, while less eating food may leads to emaciation. </p> <p>obesity...................</p>
138.

Explain the various categories of animals based on their eating habits

Answer» <p>A habitats is a place where living things live and how they survive in that area. Animals have basic needs for air, water, food, shelter, and space. Plants, animals, and even humans choose habitats for many different reasons, depending on their needs</p> <p>There are five major biomes found in the world: aquatic,desert,forest,grassland, andtundra</p>
139.

oie screen.Why is it that the birds flying in the sky do not casttheir shadows on the earth ?

Answer» <p>Shadow is an effect caused due to obstacle of sunlight giving rise to no light area . Birds are flying high above the ground, the shadow is however light falling on birds isn't well obstructed because of small size and a shadow doesn't exist because of other light particles filling the shadow area more over they are too far from earth while flying hence they don't cast a shadow. </p>
140.

4. Distinguish between photosynthesis and respiration.

Answer» <p>thanks</p>
141.

4.Distinguish between photosynthesis and respiration

Answer» <p>The biggestdifference between photosynthesis and respirationis thatphotosynthesisonly occurs in plants and some bacteria whilerespirationoccurs in all living organisms. ...Respirationis Glucose and Oxygen that, through the process ofrespiration, yield Carbon Dioxide and Water</p>
142.

b) minitial velocity- and then comesS. A car moving on a straight path covers a distance ofkm due east in 100 s. What is (i) the speed and (ii) thevelocity, of car?the velocity ofSince, velo

Answer» <p>Here, distance travelled is 1 km, that means 1000 m Time is 100 s </p><p>The formula for speed is distance divided by time, that is 1000 by 100, So the speed is 10 m/s </p><p>As the car is travelling in east side, it can be said that the velocity of the car is 10 m per s towards the east side. </p><p>Plz like my answer and accepted as best </p> <p>As we know that </p><p>1) S=d/t</p><p>=1km/100s</p><p>=1km=1000m</p><p>=1000m/100s</p><p>=10m/s</p><p>2)v=displacement /time</p><p>=1000/100</p><p>=10m/s due east</p><p>Hope it helps u</p> <p>speed = 10m/svelocity =10m/s </p>
143.

A car travelled a distance 100 km in 1 hour find it speed

Answer» <p>Speed. = distance/time = 100/1 = 100km/h</p> <p>You must do these type of questions yourself.</p>
144.

A small piece of metal wire is dragged a cross the gap betweenthe pole sofa magnetin0.4s. If change in magnetic flux in the wireis 8 x 10-4Wb, then e.m.f. induced in the wire is(a) 8 *10-3 v(b) 6 x 10-3 Vtex 4 x 10-3 v(d) 2 x 10-3 v1

Answer» <p>Option d) is correct answer.</p> <p>option d is correct answer</p> <p>therefore d is correct due to ans 2×10-³v or you can scarch in google </p> <p>my question the two sides of parallelogram are in ratio of 3:4 the length of the parallelogram is 4:2cm. find it perimeter </p> <p>option d is correct answer.</p> <p>( d )is right answer</p> <p>option d. is the correct answer h</p> <p>yes, option d ìs correct </p> <p>option d is the correct answer</p>
145.

d) A shadow can be formed in the dark/light.

Answer» <p>A shadow can be formed in light </p> <p>A Shadow can be formed in Dark</p> <p>a shade can be formed in dark</p> <p>a shadow can be formed in light</p>
146.

When is a shadow formed?

Answer»
147.

Can you think of creating a shape that would give a circular shadow if held inyone way and a rectangular shadow if held in another way?mlacompletety dark room, I you hold up a mirror in front of you, will you see areflection of yourself in the mirror?

Answer» <p>1. Cylinder gives a circular shadow when the circular base is illuminated and cast rectangle shadow when illuminated from the curved surface side. </p><p>2. In a completely dark room, a person won't be able to see the reflection of himself in the mirror. The object either needs to produce its own light or reflect light from other source in order to be form a virtual image in the mirror, which is not possible in the dark room.</p>
148.

5. How is a shadow formed?

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149.

There is no dark shadow formed by theglass when light is shone on it. This isbecauseLightGlass

Answer» <p>It is only whenlightrays are obstructed we get theshadowof the object. ... Transparent objects cannot form ashadow. They are onlyformedin opaque or translucent objects. If we take aglassslab,no shadowisformedbecause it allowslightto pass through it.</p> <p>because the glass is a transparent object transparent objects cannot form a shadow</p> <p>glass is transparent</p>
150.

Motion in which body covers equal distance in equal time interval in a straight line.

Answer» <p>Uniform motion</p>