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Chemistry

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

Mn
Mo
W
Mg

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Chemistry
Which one of the following is commonly used for pulp bleaching in the paper industry?

Mild sulphuric acid
Glucose isomerase
Hydrogen peroxide
Iodine and water

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Chemistry
________ gives hardness to stainless steel.

Carbon
Lead
Zinc
Tin

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Chemistry
The percentage of nitrogen present in ammonium sulphate is :

0.27
0.18
0.25
0.305

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Chemistry
Which of the following gases will effuse out of football bladder most quickly ?

H2
O2
He
N 2

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Chemistry
The octane number of zero is assigned to

3-methyl octane
2-methyl octane
iso-octane
n-heptane

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