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Chemistry

Chemistry
Mercury is emitted into air by

Burning coal
Burning garbage
Coal fire
Steam engine

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Chemistry
Two electrons in an orbital are differentiated by which of the following ?

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

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Chemistry
The polymerisation of which often following is used in manufacturing of polythene in industry ?

Methane
Styrene
Acetylene
Ethylene

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Chemistry
One of the constituents of tear gas is

Ether
Ethane
Ethanol
Chloropicrin

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Chemistry
The most important ore of lead is

Magnetite
Galena
Siderite
Pyrolusite

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Chemistry
Gunpowder consits of a mixture of

Sand and TNT
Sulphur, sand and charcoal
TNT and charcoal
Nitre, sulphur and charcoal

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