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Chemistry |
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| 136)The bacteria responsible for nitrogen fixation is found in the roots of | |||
| neem trees | grass | ||
| citrus plants | leguminous plants | ||
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| 137)The items amenable to detection by soft X-xrays are | |||
| narcotics | contrabands | ||
| genuine coins from counterfeit coins | lead in bullets | ||
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| 138)The best material for casting footprint marks in sand is | |||
| sulphour | paraffin wax | ||
| plaster of paris | molten lead | ||
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| 139)Old fingerprints on paper can be developed by | |||
| ninhydrin solution | iodine fuming | ||
| silver nitrate solution | universal gray powder | ||
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| 140)Absolute alcohol is | |||
| 95% proof | 200% proof | ||
| 100% proof | rectified sprit | ||
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| 141)The maximum concentration of alcohol that does not impair faculties of the human body is | |||
| 2.3% | 0.01% | ||
| 0.9% | 0.3% | ||
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| 142)The particle that display dual nature of both waves and particle, are | |||
| electrons | protons | ||
| neutrons | mesons | ||
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| 143)Anaemia occurs due to the lack of | |||
| iron | calcium | ||
| potassium | iodine | ||
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| 144)The drug, reserpine, is used to | |||
| reduce high blood pressure | reduce high palpitation | ||
| alleviate pain | cure arthritis | ||
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| 145)The best way of sterilising a hypodermic syringe for injecting medicine is by | |||
| boiling it in water | keeping it in alcohol for some time | ||
| cleaning it with an alcohol-water mixture | boiling it in water in pressure cooker | ||
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| 146)The energy obtained per gram intake is highest from | |||
| proteins | vitamins | ||
| hormones | carbohydrates | ||
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| 147)Which one of the following can not be used as insecticide? | |||
| malathion | DDT | ||
| bleaching powder | gammexane | ||
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| 148)The main use of mica is in | |||
| petroleum refining | electrical industry | ||
| steel industry | glass and pottery industry | ||
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| 149)For rural electrification and domestic cooking, the most appropriate and economical would be | |||
| electricity | biogas | ||
| wind mills | nuclear energy | ||
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| 150)The substance coated on plastic taperecorder tapes is | |||
| iron oxide | magnesium oxide | ||
| zinc oxide | iron sulphate | ||
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