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Chemistry

Chemistry
Which one element from below list is liquid at room temperature

Bromine
Lead
Zinc
Argon

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Chemistry
Persons working in cement plants and lime stone quarries are prone to disease like

Asthma
Pneumoconiosis
Silicosis
Cancer

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Chemistry
Tear gas is :

Carbonyl chloride
Nitrous oxide
Bleaching powder
Chloroprene

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Chemistry
The alkaloid naturally found in coffee, cocoa and cola nut is

Cocaine
Tannin
Morphine
Caffeine

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Chemistry
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

1 gram of molecule
5 gram of molecule
10 gram of molecule
0.5 gram of molecule

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Chemistry
Which of the following metals can displace copper from copper sulphate solution ?

Iron
Gold
Mercury
Platinum

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