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Chemistry

Chemistry
Which of the following gases is most toxic ?

Sulphur dioxide
Carbon dioxide
Carbon monoxide
Chlorine

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Chemistry
What is the most commonly used substance in fluorescent tubes?

Sodium oxide and argon
Sodium vapour and neon
Mercury oxide and neon
Mercury vapour and argon

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Chemistry
The rusting of iron is a/an

Electrical change
Electrochemical change
None of these
Physical change

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Chemistry
The tip of the match-stick contains

Red phosphorus
Phosphorus pentoxide
White phosphorus
Phosphorus trichloride

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Chemistry
Tear gas is :

Chloroprene
Bleaching powder
Nitrous oxide
Carbonyl chloride

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Chemistry
Iodex, a pain relief balm, has the smell of ________ .

Methyl salicylate
Propyl salicylate
Ethyl salicylate
Butyl salicylate

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MORE MCQ ON Chemistry

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