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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.
| 4151. |
6. If the result of two vectors 12 m and 16 m are (i) 28m (i) 4 m (iii) 20 m, find the angles between them.[Ans. (i) θ-0° (ii) θ180° (İİİ) θ-9001 |
| Answer» <p>(i) 28 = 12 + 16 so angle is 0(ii) 4 = 16 - 12 so angle is 180(iii) 20 = _/ 16^2 + 12^2 so angle is 90</p> | |
| 4152. |
e other types of questions:Burning of a heap of green leaves is difficult but dry leaves catch the fire easily. WhExplain brieflyHo |
| Answer» <p>Green leavescontain moisture and as a result, the ignition temperature ofgreen leavesis much higher than that of dryleaves. Due to this, it is difficult toburn a heap of green leavesbut dryleavescatch fire easily.</p> | |
| 4153. |
EDILIIDIDUI TUUU ILU PILIL13. Why are the leaves of a plant usually green?14. Name the green pigment nresent in the leaves of a plant. |
| Answer» <p>Leaves are green because their cells contain chloroplasts which have the pigment chlorophyll which absorbs deep-blue and red light, so that the rest of the sunlight spectrum is being reflected, causing the plant to look green</p> <p>the leaves of a plant is usually green in colour due to the presence of chlorophyll.</p> <p>plants are green because their cells contain chloroplasts which have the pigment chlorophyll which absorbs deep-blue and red light, so that the rest of the sunlight spectrum is being reflected, causing the plant to look green.if u satisfied with the ans then like or cmmt ✌️</p> <p>the leaves of a planet is usually green in colour due to the presence of chlorophyll.</p> <p> the leaves of plants is usually green as they have a green coloured pigment called Chlorophyll </p> <p>due to presence of chlorophyll . chlorophyll is green in colour so the leaves of plants is usually green .</p> <p>due to presence of chlorophyll.....</p> | |
| 4154. |
VIIvii. Explain the following statement.The geostationary satellite is not useful in the study of polar region. |
| Answer» <p>A geostationary satellite, is a satellite that revolves in the same direction the earth rotates. There cannot be geostationary satellite at the poles, because, it would have to be at rest, which cannot happen as it would get pulled by the earth's gravity and eventually crash to the earth's surface.</p> | |
| 4155. |
Two gases A and B have critical temperatures as 250 K and 125 K respectively. Whione of these can be liquefied easily and why? |
| Answer» <p>Gas A with the critical temperature 250K can be liquefied easily.</p><p>Explanation:</p><p>Liquefaction of gases takes place when the intermolecular force between the molecules becomes so strong that the gas molecules come together to attain liquid state. Liquefaction can be attained by cooling the gas so that the kinetic energy of the molecules reduces and they slow down. Therefore, a higher critical temperature is easier to attain as we start cooling the gas.</p> | |
| 4156. |
ot ore" Comment.All the ores are minerals, but all the minerals are n |
| Answer» <p>Minerals are naturally occurring chemical compounds in the earth's crust.Out of many minerals in which a metal may be found, only a few minerals are chemically and commercially viable to be used as sources for the extraction of the metal.Such minerals are known as Ores.</p><p>Hence, all ores are minerals but all minerals are not ores.</p> | |
| 4157. |
0,nle gro25. A particle is dropped from a tower 180 m high. How long does it take to reacund ? What is its velocity when it touches the ground? Make a table similas that you made in Q. 22. Plot distance-time, velocity-time and acceleration-tingraphs. |
| Answer» <p>great answer </p> <p>aap ka age kitna hai</p> | |
| 4158. |
What is our national bird? |
| Answer» <p>மயில்( peacock) ...................... </p> | |
| 4159. |
indian national bird |
| Answer» <p>Peacock is indian national bird</p> <p>peacock is the Indian national bird . They also called Indian peafowl</p> | |
| 4160. |
............ is a source of electricity.and chapter is electricity and circuit |
| Answer» <p>Are there options given?</p><p>Electricity is derived from primary sources, including coal, natural gas, nuclear fission reactions, sunlight, wind, and hydropower.</p> | |
| 4161. |
1. Electricity produced from sunlight is called |
| Answer» <p>Solar Power</p><p>Explanation:Solar thermal power (electricity) generation systems collect and concentrate sunlight to produce the high-temperature heat needed to generate electricity.</p> | |
| 4162. |
What did Newton place in the path of sunlight? |
| Answer» <p>Ans :- Ultimately, he realized and proved that the force behind the apple's fall also causes the moon to orbit the earth; and comets, the earth and other planets to orbit thesun. The force is felt throughout the universe, so Newtoncalled it Universal Gravitation. In a nutshell, it says that mass attracts mass.</p> | |
| 4163. |
The substance which the organisms obtain from the surroundings to derive energy for its maintenanceand growth is known asc.i. nutrienti. sunlightiv. soilii. chlorophyll |
| Answer» <p>the substance which organisms obtained from surrounding to derive energy for it's maintenance and growth is known as nutrients</p> | |
| 4164. |
The percer tage of water by weigit in the human body is150%b)60%c) 70% |
| Answer» <p>Ans :- The average adult human body is50-65%water, averaging around57-60%. The percentage of water in infants is much higher, typically around75-78%water, dropping to65%by one year of age. Body composition varies according to gender and fitness level because fatty tissue contains less water than lean tissue.</p> | |
| 4165. |
Dalton principles |
| Answer» <p>The main points ofDalton'satomictheoryare: Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. ... Achemicalreaction results in the rearrangement of atoms in the reactant and product compounds</p> | |
| 4166. |
In what respect is a tornado different from a hurricane |
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| 4167. |
What is the difference between a thunderstorm and a tornado? Which is more devastating and why? |
| Answer» <p>A storm is a short-lived, very hard wind over an area that produces brief downpours, thunder and lightning. It forms in the warm and humid air.</p><p>A tornado or cyclone as it can also be called is a local phenomenon in which a column of spinning air that moves underneath a heavy thunderstorm. </p><p>Tornadoes are more devastating. It is like a hose and sucks up everything on and above the ground.</p> | |
| 4168. |
What is the difference between a thunderstorm and a tornado? Which is more devastating3and why? |
| Answer» <p>A storm is a short-lived, very hard wind over an area that produces brief downpours, thunder and lightning. It forms in the warm and humid air.</p><p>A tornado or cyclone as it can also be called is a local phenomenon in which a column of spinning air that moves underneath a heavy thunderstorm. </p><p>Tornadoes are more devastating. It is like a hose and sucks up everything on and above the ground.</p> | |
| 4169. |
Q.8. What do you know about 'global warming'? Whatareitsilleffects? |
| Answer» <p>Global warming occurs when carbon dioxide (CO2) and other air pollutants and greenhouse gases collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface. Normally, this radiation would escape into space—but these pollutants, which can last for years to centuries in the atmosphere, trap the heat and cause the planet to get hotter. That's what's known as the greenhouse effect.Melting glaciers, early snowmelt, and severe droughts will cause more dramatic water shortages and increase the risk of wildfires in the American West.</p><p>Rising sea levels will lead to coastal flooding on the Eastern Seaboard, especially in Florida, and in other areas such as the Gulf of Mexico.</p><p>Forests, farms, and cities will face troublesome new pests, heat waves, heavy downpours, and increased flooding. All those factors will damage or destroy agriculture and fisheries.</p> | |
| 4170. |
Give one word for trembling of the Eartha. |
| Answer» <p>Tremor is a trembling or shaking of Earth. </p> | |
| 4171. |
what is ideal black body |
| Answer» <p>A blackbody refers to an opaque object that emits thermal radiation. A perfect blackbody is one that absorbs all incoming light and does not reflect any. At room temperature, such an object would appear to be perfectly black.</p> | |
| 4172. |
some information about black holes. |
| Answer» <p>Ablack holeis a region ofspacetimeexhibiting such stronggravitationaleffects that nothing—not evenparticlesandelectromagnetic radiationsuch aslight—can escape from inside it.The theory ofgeneral relativitypredicts that a sufficiently compactmasscan deformspacetimeto form a black hole.The boundary of the region from which no escape is possible is called theevent horizon. Although the event horizon has an enormous effect on the fate and circumstances of an object crossing it, no locally detectable features appear to be observed.In many ways a black hole acts like an idealblack body, as it reflects no light.Moreover,quantum field theory in curved spacetimepredicts that event horizons emitHawking radiation, withthe same spectrumas a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin forblack holes of stellar mass, making it essentially impossible to observe.</p> | |
| 4173. |
what are black holes. |
| Answer» <p>A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.</p> | |
| 4174. |
Does white holes really exists? if existed, what is white hole. |
| Answer» <p>White holes, which are theoretically the exact opposites ofblack holes, could constitute a major portion of the mysterious dark matter that's thought to make up most of the matter in the universe, a new study finds. And some of these bizarre white holes may even predate the Big Bang, the researchers said.</p> | |
| 4175. |
A well of diameter 140 em has a stone parapet around it. If the length of the outer edge of the parapet is616 cm, find the width of the parapoet |
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| 4176. |
first come egg or hen |
| Answer» <p>first their living molecules came, then they formed eggs and hens</p> <p>thank you</p> | |
| 4177. |
C. Circle the odd-one out giving appropriate reason.1. Reversible change, Temporary change, Permanent change, Glowing of an electr2. Change of milk into curd, Rusting of iron, Evaporation of water, Burning of wood3. Formation of ice from water, Blowing of balloon, Ignition of a matchstick, MeltingcreamTeacher's Signature :.SciencePart-6. 12 |
| Answer» <p>1. Permanent change2. Evaporation of water3. Ignition of a matchstick</p><p>Hope it helps.Mark as best if you like.</p> <p>permanent changeevaporation of waterignition of a matchstick</p> <p>1. permanent change2. Evaporation of water 3. lgnition of a matchstick </p> | |
| 4178. |
Estimate the fraction of molecular volume to the actual volume occupied by oxygengas at STP. Take the diameter of an oxygen molecule to be 3 A. |
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| 4179. |
4. Which of the following is not biodegradable?fruitsvegetablesearthworminium foil |
| Answer» <p>Aluminium foil is not biodegradable as it is a metal</p> | |
| 4180. |
2. Why are green vegetables and fruits important for us? |
| Answer» <p>Fruits and vegetables are low in calories and high in vitamins, minerals, phytochemicals, and fiber.That's why they are important for us.</p> <p>Fruitsandvegetablescontainimportantvitamins, minerals and plant chemicals. They also contain fibre. There are many varieties offruitandvegetablesavailable and many ways to prepare, cook and serve them. A diet high infruitandvegetablescan help protect you against cancer, diabetes and heart disease.</p> | |
| 4181. |
2. Hydrogen and oxygen combine in techniques, weimages of surfacthe ratio of 1:8 by mass to formwater. What mass of oxygen gaswould be required to reactcompletely with 3 g of hydrogerngas? |
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| 4182. |
22. The volume of a 500 g sealed packet is 350 cm3. Will the packetfloat or sink in water if the density of water is 1 g cms? Whatwill be the mass of the water displaced by this packet? |
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| 4183. |
Suppose you are in a dark roomyou see objects outside the room. Explain.1.Can you see objects in the room? Can |
| Answer» <p>We see only those objects from which reflected rays enter our eyes. When we are in a dark room then we do not see objects, We can see objects outside the room because out of the room the light is available and those rays of light enter our eyes after reflection.</p> | |
| 4184. |
1. Supppose you are in a dark room. Can you see objects in the room? Canyou see objects outside the room. Explain. |
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| 4185. |
1.. Suppose you are in a dark room. Can you see objects in the room? cCanyou see objects outside the room. Explain, |
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| 4186. |
5. Name sensory organs of man and theirfunctions. |
| Answer» <p>Ans:- </p><p>The five sense organs are:</p><p>Eyes</p><p>Nose</p><p>Skin</p><p>Tongue</p><p>Ears</p><p>The functions are as follows:</p><p>Eyes: detect color and light.</p><p>Nose: detect scents.</p><p>Skin: detects pain, pressure, heat and cold.</p><p>Tongue: detects taste; sweet, salty, sour and bitter.</p><p>Ears: detect sounds</p> | |
| 4187. |
The muscular and sensory organ whichhelps in mixing the food with saliva is |
| Answer» <p>Tongue – Tongue is a muscular organ that helps in mixing of saliva with food which makes swallowing of food easy.</p> | |
| 4188. |
How do bats 'see' with their ears? |
| Answer» <p>Many people thinkbatsare blind, but in fact theycan seealmost as well as humans. However, at night,their earsare more important thantheireyes - they use a special sonar system called 'echolocation,' meaning theyfindthings using echoes.</p> | |
| 4189. |
4) Explain briefly (D:IT CLASS IXISIKKIM.DOC?(8)/ |
| Answer» <p>If it is a computer science question. Answer is as follows.The given extension states that there is a word file sikkim as the extension is .doc in folder 'IT CLASS IX' which is stored in drive D. The given extension desginate the address of a file.</p> | |
| 4190. |
A·In the given igure, AB|ICD and a transversal EF cuts them at G and HrespectivelyITGL and HM are the bisectors of the alternate angles AGH and"GHD respectively, prove that G HMs.-b- |
| Answer» <p>Thanks;)</p> <p>Thanks;)</p> | |
| 4191. |
A car cover a distance of 260 km in 12 hour, find the speed of the car in m/s. |
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| 4192. |
Example 64. When an automobile moving with a speed of36 km/h reaches an upward inclined road of angle 30, itsengine is switched off. If the coefficient of friction involved is0.1, how much distance will the automobile move beforecoming to rest ? Take g = 10 ms^-2 |
| Answer» <p>F = normal force by the incline f = kinetic frictional force </p><p>perpendicular to incline, force equation is given as F = mg Cos30 eq-1μ = coefficient of friction = 0.1kinetic frictional force is given as f = μFusing eq-1f = μmg Cos30 eq-2parallel to incline force equation is given as</p><p>mg Sin30 + f = ma </p><p>using eq-2</p><p>mg Sin30 + μmg Cos30 = ma </p><p>a = g (Sin30 + μCos30)</p><p>a = (9.8) (Sin30 + (0.1)Cos30)</p><p>a = 5.75 m/s²</p><p>consider the upward parallel to incline direction as positive </p><p>v₀ = initial velocity = 36 km/h = 10 m/s </p><p>v = final velocity when it comes to stop = 0 m/s </p><p>a = acceleration = - 5.75 m/s²</p><p>d = distance travelled before stopping </p><p>using the equation </p><p>v² = v²₀ + 2 a d </p><p>0² = 10² + 2 (- 5.75) d</p><p>d = 8.7 m </p> | |
| 4193. |
e circuit isan electric cellan electric gadgetpill in the blanks.1. An electric2. Automobile batte3. A dry cell hasallows a device to beobile battery is an example ofterminalsvice to be turned ON or OFF.Afused bulb is a bulb in whichIn an electric circuit, current flows from theterminal of the electric cell.6. The dry cell was invented byis broken.terminal to theStatehet |
| Answer» <p>1.An electric switch allows a device to be turned ON or OFF.2.Automobile is an example of lithium ion cell.3.A dry cell has 2 terminals.4.A fused bulb is the bulb in which filament is broken.5.In an electric circuit,current flows from the positive terminal to the negative terminal of the electric cell.6.The dry cell was invented by Carl Gassner.</p> <p>Answers are 1.switch 2.cell battery 3.two 4.filament 5.positiue ,negative </p> <p>switchcellbatterytwofilamentpositive,negative</p> | |
| 4194. |
DistanceTimeAverage speed120 km60 km hr3 hours50 km/hr(3) |
| Answer» <p>time 2hr, km 150 hiiiiii</p> <p>it's 2h and 150 km in the above paper</p> | |
| 4195. |
BulbmentduetElectric celTerminal1. Fill in the blanks :al A device that is used to break an electric ctireut is cailed(b) An electric cell has2 Mark True' or False for following statements(al Electric current can flow through metals(bl Instead of metal wires, a jute string can betermicalsused to make a circuit.(c) Electric current can pass through a sheetof thermo Col.3. Explain why the bulb would not glow in thearrangement shown in Flg. 12.13Fig 1213ASD CIRCUITS |
| Answer» <p>1. a) di-electric b) two</p><p>2. T , F , F </p><p>3. because the end of the tool is plastic , which is non-conducting matter</p> | |
| 4196. |
. Which of the following does not produce H, with 34NaOH ?(1) Si(3) B(2) S(4) Zn |
| Answer» <p>option b sulphur3S + 6NaOH--2Na2S + Na2SO3+ 3H2O</p> <p>ty</p> | |
| 4197. |
Atmospheric pressure ....................with height abovesealevel. |
| Answer» <p>decreases. is the correct answer</p> | |
| 4198. |
(How an electric circuit and an electric device can be saved from the damage due to overloading?) |
| Answer» <p>Ans :- That would be a circuit breaker. A circuit breaker is installed in a utility panel with other breakers, and is set to trip off if a circuit controlled by the breaker draws too much current. This could happen when you plug too many high-amperage devices, such as space heaters, into a single circuit. Without a circuit breaker, such a situation can overheat the wires and cause a fire or a short circuit which could lead to electrocution or death. With a circuit breaker, you will not be able to overload the circuit, as the circuit breaker will trip as soon as it reached a maximum load level.</p> <p>Everyelectric circuitin a wiring system must beprotectedagainstoverloads. Acircuit overloadoccurs when the amount ofcurrentflowing through thecircuitexceeds the rating of the protective devices. ... If thecurrentexceeds 15 amps, thecircuitbreakerwillopen up, cutting off any morecurrentflow.</p> | |
| 4199. |
10. Show that for a point on the equatorial line of an electric dipole ,the potential is zero. [2) |
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| 4200. |
1.How does binary fission differ from mult |
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