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Chemistry

Chemistry
The number of moles of solute present in 1 kg of a solvent is called its

formality
molality
normality
molarity

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Chemistry
Which is abundant in Gobar gas?

Carbon dioxide
Hydrogen
Oxygen
Methane

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Chemistry
Which of the following metals has least melting point ?

Silver
Mercury
Copper
Gold

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Chemistry
The chief source of naphthalene is

Diesel
Charcoal
Camphor
Coal-tar

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Chemistry
High concentration hydrocarbon pollutants in atmospheric air causes

Respiratory diseases (e.g.asthma)
Silicosis
Reduced crop yield
Cancer

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Chemistry
When a bond is formed between two atoms, the energy of the system will

Increase
Remain the same
Decrease
May increase or decrease

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