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Chemistry

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

Mo
Mn
W
Mg

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Chemistry
The source of energy that causes the least global warming is

Coal
Geothermal energy
Natural Gas
Petroleum

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Chemistry
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

1/4
1/3
1/8
1/6

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Chemistry
Submarines move under water. They have engines that run on

Batteries
Diesel
Petrol and oxygen
Steam

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Chemistry
What material is used to make electric heater coil ?

Nichrome
Copper
Iron
Silver

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Chemistry
The orientation of an atomic orbital is governed by

Principal quantum number
Spin quantum number
Magnetic quantum number
Azimuthal quantum number

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