AP EAMCET · Chemistry · p Block Elements (Group 13 & 14)

In the structure of $B_{2} H_{6}$ , the number of ${BH}_{2}$ groups present in one plane, and the number of $B - H$ bonds, $B - B$ bonds, $B - H - B$ bridge bonds are respectively

A $2, 0, 3, 2$
B $3, 2, 2, 2$
C $2.4, 0, 2$
D $2, 4, 2, 0$

Verified Solution

Answer & Solution

Correct Answer

(C) $2.4, 0, 2$

Step-by-step Solution

Detailed explanation

The structure of B2H6 contain four hydrogen connected to B atoms by covalent bonds. So there are four 2 centred- 2 electron bonds. Two hydrogen atoms are connected by bridge and it is connected to 2 boron atoms. So, there are two 3-centred- 2- electron bonds.…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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In the structure of B2H6, the number of BH2 groups present in one plane, and the number of B-H bonds, B-B bonds, B-H-B bridge bonds are respectively

Step-by-step Solution

In the structure of $B_{2} H_{6}$ , the number of ${BH}_{2}$ groups present in one plane, and the number of $B - H$ bonds, $B - B$ bonds, $B - H - B$ bridge bonds are respectively