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Chemistry

Chemistry
What is the element required for solar energy conversion ?

Tantalum
Ultra pure carbon
Silicon
Beryllium

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Chemistry
Helium gas is filled in ballons because

It is one of the constitutents of water
It is lighter than air
It is a noble gas
Its atomic number is 2

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Chemistry
A metal is exposed to the atmosphere for sometime. It becomes coated with green carbonate. The metal must be

Zinc
Copper
Aluminium
Silver

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Chemistry
The gas that usually causes explosions in coal mines is

Hydrogen
Air
Methane
Carbon monoxide

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Chemistry
Normal rainwater has a pH level of

8.3
5.6
3.2
6.3

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Chemistry
Which among the following elements is found in maximum percentage in the human body ?

Oxyzen
Hydrogen
Carbon
Nitrozen

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MORE MCQ ON Chemistry

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