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Chemistry

Chemistry
Among the following the hardest metal is

Gold
Iron
Tungsten
Platinum

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Chemistry
Chemical composition of cement is

Clay and Gypsum
Limestone and Gypsum
Limestone and Clay
Limestone, Clay and Gypsum

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Chemistry
The compound to which H2 does not add is

Tetra –9 – phenanthrylethylene
Tetraphenyl ethylene
Biphenyl ethylene
Tetra – a –naphthylethylene

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Chemistry
The chemical name of 'laughing gas' is

Nitric oxide
Nitrous oxide
Nitrogen pentoxide
Nitrogen dioxide

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Chemistry
Hardest allotrope of carbon is

Graphite
Coke
Diamond
Lamp black

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Chemistry
Chemical formula of washing soda is

Na2CO3.10H2O
Ca(OH)2
NaHCO3
Na2SO4.10H2O

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MORE MCQ ON Chemistry

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