Question

The pair that has similar shape is
A. $$B{F}_3,Br{F}_3$$
B. $$S_2{F}_2,S_{2}C{l}_2$$
C. $$O_2{F}_2,S_{2}C{l}_2$$
D. $$B_2{H}_6,N_2{H}_4$$

Answer 1

Hint: $$S_2{F}_2$$ and $$S_{2}C{l}_2$$ both have $$s{p}^{3}d$$ hybridization and has the shape which is similar to $$H_2{O}_2$$. In the same way, $$O_2{F}_2$$ has the structure similar to $$H_2{O}_2$$.

Complete step by step answer:
 $$B{F}_3$$ have the $$s{p}^2$$ hybridization but $$Br{F}_3$$ (Bromine Trifluoride) have the $$s{p}^{3}d$$ hybridization. So, $$B{F}_3$$ is triangular (Trigonal planar) in shape having bond angle $${120}^{\circ }$$ but $$Br{F}_3$$ is ‘T’ shaped or trigonal bipyramidal with a bond angle of $${86.2}^{\circ }$$.

$$S_2{F}_2$$ (Disulphuric difluoride) is a halide of sulphur have the $$s{p}^3{d}^{}$$ hybridization. Its shape is gauche (half-open book shape) which is similar to $$H_2{O}_2$$ with bond angle of $${108.3}^{\circ }.S_{2}C{l}_2$$ is a polar molecule and has $$s{p}^{3}d$$ hybridization. It has the shape of gauche.

 $$O_2{F}_2$$ has the structure similar to $$H_2{O}_2$$. It has the shape of a half-open book (gauche in shape) $$S_{2}C{l}_2$$ also has the shape similar to $$O_2{F}_2$$.

In (Diborane), Boron is $$s{p}^3$$ hybridised, there are two terminals $$B-H$$ bonds for each boron atom and there are only 12 bonding electrons available. The structure of Diborane molecule consists of 4 H atoms and that of two boron atoms coming on the same plane. In between these planes, there are said to be two dividing atoms of H. The two atoms of B left with that of each unpaired electron orbital and empty orbital forms the two bridging’s $$\left(B-H-B\right)$$ bonds with that of the two 1s hydrogen atoms, is also called as the banana bond and on the other hand, $$N_2{H}_4$$ (Nitrogen hydride or Hydrazine) is a strong base. Each subunit of $$H_{2}N-N$$ is pyramidal and $$N-N$$ bond distance is about $$1.4A^{\circ }$$.

Therefore, the correct answer is option (B) and (C).

Note: Diborane is a chemical compound that consists of boron (B) and hydrogen (H) atoms and has a molecular formula $$B_2{H}_6$$. This substance is highly unstable at the room temperature and has a sweet odour. The compounds consisting of boron and hydrogen atoms are called boranes and diborane is one of the simplest boron hydrides.