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  • In the following question, a statement of assertion is followed by a statement of reason.Select the correct option: Assertion:The melting and boiling

In the following question, a statement of assertion is followed by a statement of reason.Select the correct option:

Assertion:The melting and boiling points of group 14 elements are much lesser than those of the elements of group 13.

Reason:Group 13 elements form four covalent bonds.

Option: 1

 Both assertion and reason are true and reason is the correct explanation of assertion.


Option: 2

Both assertion and reason are true but reason is not the correct explanation of assertion.


Option: 3

Assertion is true but reason is false.

 


Option: 4

Both assertion and reason are false.


Answers (1)

best_answer

The melting and boiling points of group 14 elements are much higher than those of the elements of group 13 and this is because group 14 elements form four covalent bonds with each other and hence there exists strong binding forces between their atoms both in the solid as well as in the liquid state.The melting and boiling point decrease on descending the group from carbon to lead because the M–M bond becomes weaker since the atomic size increases.

Posted by

Ritika Kankaria

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