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Chemistry

Chemistry
The element which is used for vulcanizing rubber

Phosphorus
Sulphur
Silicon
Bromine

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Chemistry
The percentage of Nitrogen in Air is

0.03
0.94
85.02
78.03

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Chemistry
What is the covalency of nitrogen in ammonia molecule

2
3
4
5

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Chemistry
A thick paste of cement, sand and water is called

Mortar
Concrete
Kiln
R.C.C.

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Chemistry
The most abundant rare gas in the atmosphere is

Ne
Ar
He
Xe

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Chemistry
Which of the following is used as anesthetic ?

N2O
NO2
NH3
NO

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