Pick up the correct statement out of the...

Pick up the correct statement out of the following.

A

Electron gain enthalpy of fluorine is smaller than bromine

B

Bond dissociation energy of `I_2` more than `F_2`

C

Bromine is a volatile liquid.

D

The colour of halogen becomes deeper from `F_2` to `I_2`.

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Select the correct statement from the following :

A

Methanobacterium is an aerobic bacterium found in rumen of cattle

B

Biogas, commonly called gobar gas, is pure methane

C

Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria

D

Biogas is produced by the activity of aerobic bacteria on animal waste

Choose the correct statement from the following .

A

Milk is an emulsion

B

Brownian movement is observed in fog .

C

Both (a) and (b) correct

D

Cleansing action of soap is due to formation of multimolecular colloids

Pick up the correct statement about alkyl halides.

A

they are associated with each other by H bond.

B

They dissolve in water quickly.

C

They dissolve easily in organic solvents.

D

They do not contain any polar bond in their nolecules.

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SHARAM PUBLICATION-GROUP 17 ELEMENTS (HALOGEN FAMILY)-EXERCISE

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