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Chemistry

Chemistry
Liquid Nitrogen boils at

77 kelvin
97 Kelvin
82 Kelvin
54 kelvin

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Chemistry
Which of the following gases is most toxic ?

Sulphur dioxide
Carbon dioxide
Chlorine
Carbon monoxide

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Chemistry
Which of the following is a natural polymer?

Starch
Nylon
Polythene
Bakelite

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Chemistry
The filter over which sewage is sprinkled is called as

Contact bed
Trickling filter
Percolating filter
Intermittent sand filter

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Chemistry
Which one is the most reactive halogen

Chlorine
Fluorine
Bromine
Iodine

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Chemistry
The cathode of a lead storage battery is made up of

Manganese dioxide
Zinc
Lead
Lead oxide

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