Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$
Assertion $A$ : Boron is unable to form ${BF}_{6}^{3 -}$
Reason $R$ : Size of $B$ is very small.
In the light of the above statements, choose the correct answer from the options given below

Question

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$

Assertion $A$ : Boron is unable to form ${BF}_{6}^{3 -}$

Reason $R$ : Size of $B$ is very small.

In the light of the above statements, choose the correct answer from the options given below

Quantrex Academy · Accepted Answer

Correct answer: B. Both A and R are true but R is not the correct explanation of A

Due to non-availability of d orbitals, boron is unable to expand its octet. Therefore, the maximum covalence of boron cannot exceed $4$ .
Boron is the first element from top in group $13$ and the atomic size increases down the group. Therefore, boron is smallest in size.
Assertion $A$ : True
Reason $R$ : True but not correct explanation.

Given below are two statements: one is labelled as Assertion A and...

Options

Correct answer

Step-by-step solution

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