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Chemistry

Chemistry
Bleaching powder is used in drinking water as a/an

Coagulant
Antibiotic
Antiseptic
Disinfectant

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Chemistry
Which of the following vitamins is generally excreted by human in urine?

Vitamin B
Vitamin C
None of these
Vitamin D

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Chemistry
Pyrethrin used in mosquito coil is obtained from

An insect
A fungus
A seed plant
A bacterium

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Chemistry
Which one amongst the following is not a Green House gas?

Chloro fluoro carbons
Nitrogen
Carbon Monoxide
Carbon dioxide

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Chemistry
Maximum permissible concentration of total hardness in drinking water is

500
200
100
50

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Chemistry
Basicity of boric acid, H3BO3 is

4
2
3
5

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