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  • Given below are two statement: Statement I: The boiling points of the following hydrides of elements increases in the order: <span style="font-famil

Given below are two statement:

Statement I: The boiling points of the following hydrides of elements increases in the order:

H2O > NH3 > CH4

Statement II:

The boiling points of these hydrides increase with increase in molar mass.

In the light of the above statements, choose the most appropriate answer from the options given below:

Option: 1

Statement I is incorrect but Statement II is correct.


Option: 2

Both Statement I and Statement II are correct.


Option: 3

Both Statement I and Statement II are incorrect.


Option: 4

Statement I is correct but Statement II is incorrect


Answers (1)

best_answer

The correct option is 4. Statement I is correct but Statement II is incorrect

It is because H2O has the highest boiling point in the group due to intermolecular hydrogen bonding and NH3 also has intermolecular hydrogen bonding but water molecules take part in more hydrogen bonding than ammonia.

Whereas  boiling point of  CH4 can be explained on the account of increasing strength of Vander Waals forces due to increasing size & molar masses.

Posted by

Gaurav

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