question_answer

Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:

Select the correct statement (s). (1)\[Ar,Kr\]and\[Xe\]form clathrate. (2)\[Xe{{O}_{3}}\]has four\[\sigma \]and four\[\pi \]bonds. (3) In white phosphorus four lone pairs of electrons are present. (4) In diborane boron is\[s{{p}^{2}}\]hybridised.

A)  1, 2 and 3 are correct.

B)  1 and 2 are correct.

C)  2 and 4 are correct.

D)  1 and 3 are correct.

Correct Answer: D

Solution :

                 (1)\[Ar,\text{ }Kr\]and\[Xe\]form clatharate because they have low ionisation potential. (2) \[Xe{{O}_{2}}=3bp+1\,lp,\]                 \[\therefore \]\[Xe{{O}_{3}}\] contains\[3\sigma ,3\pi -\]bonds and one lone pair of electrons. (3) (4) \[\therefore \]Statements (1) and (3) are correct.