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Chemistry

Chemistry
Which of the following acts as promoter for iron in Haber's process

Mg
Mn
W
Mo

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Chemistry
Tar roads get damaged if there is

Stagnation of water on road
No sloping
Heavy traffic
No maintenance

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Chemistry
Which one of the following group of gases contributes to the 'Green House Effect'?

Carbon monoxide and Sulphur dioxide
Carbon tetraflouride and Nitrous oxide
Ammonia and Ozone
Carbon dioxide and Methane

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Chemistry
How many neutrons are there in 92U238 atom ?

146
92
238
330

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Chemistry
Non-stick kitchenwares are coated with

Silicon
Teflon
Graphite
PVC

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Chemistry
Ruby and sapphire are oxides of

Aluminium
Iron
Copper
Tin

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