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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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