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Physical Science |
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| 206)Alcohol is used as a thermimetric liquid when it is used to measure | |||
| Low temperature | Very high temperature | ||
| High temperature | None of these | ||
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| 207)Water pipes are apt to burst in cold weather because | |||
| They contract due to cold weather | The water in the pipe can not evaporate | ||
| They expand due to cold weather | The water in the pipe turns into ice and expands | ||
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| 208)Humidity in air is measured by | |||
| Manometer | Hydrometer | ||
| Hygrometer | None of these | ||
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| 209)Why does ice in sawdust not melt quickly? | |||
| Sawdust does not allow the air to touch the ice | Sawdust is a bad conductor of heat | ||
| The water is absorbed by sawdust | none of these | ||
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| 210)Clear sky is blue in colour, why? | |||
| Blue colour scatters more than other colours | Blue colour absorbed in the sky | ||
| Red colour scatters more than other colours | None of these | ||
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| 211)Grass looks green because | |||
| It is by nature | It reflects green light | ||
| It absorbs all the colours of white light except green colour | It absorbs green colour of white light | ||
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| 212)Why does evaporation bring a fall in temperature? | |||
| It gives out heat | it absorbs heat | ||
| It is natural | None of these | ||
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| 213)Among cold, warm and boiling water which one is best fire extinguisher? | |||
| Hot water | Cold Water | ||
| Boiling water | None of them | ||
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| 214)Acoustic is the science dealing with the study of | |||
| Light | Space | ||
| Sound | Matter | ||
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| 215)At which location on the earth a body weight least? | |||
| North Pole | South Pole | ||
| Equator | None of these | ||
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| 216)Fathometer is used to | |||
| Measure heat | Measure current | ||
| Measure depth of ocean | Measure intensity of sound | ||
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| 217)The instrument used for recording sound under water is | |||
| Hydrophone | Gravimeter | ||
| Hygrometer | None of these | ||
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| 218)Light year is unit of | |||
| Distance | Time | ||
| Velocity | None of these | ||
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| 219)Essential component of cement is | |||
| Gypsum | Sandstone | ||
| Bauxite | Limestone | ||
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| 220)Stainless steel is made up of | |||
| Copper and cadmium | Zinc and Tin | ||
| Chromium and Carbon | Aluminium and Zinc | ||
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