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Chemistry

Chemistry
Of the following compounds of calcium, the one having highest covalent character is

Cacl2
CaF2
CaBr2
Cal2

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Chemistry
The hottest part of the gas flame is known as

blue zone
non-luminous zone
dark zone
luminous zone

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Chemistry
Formic acid is produced by

Mosquitoes
Cockroaches
White ants
Red ants

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Chemistry
The property of hydrogen which distinguishes it from alkali metals is

Its affinity for non-metal
Its electropositive character
Its non-metallic character
Its reducing character

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Chemistry
The gas which turns into liquid at the lowest temperature among the following is

Nitrogen
Hydrogen
Helium
Oxygen

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Chemistry
Coal is formed from

Deposit of animal waste
Compressed and hardened biomass
Crude oil
Coke

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