MCQ
Bond angle is minimum for
- A${H_2}O$
- B${H_2}S$
- C${H_2}Se$
- ✓${H_2}Te$
✓
Answer
Correct option: D.
${H_2}Te$
d
(d) As we go down the group electronegativity decreases due to which repulsion between bonded pairs of electron also decreases. Hence, bond angle decreases.
(d) As we go down the group electronegativity decreases due to which repulsion between bonded pairs of electron also decreases. Hence, bond angle decreases.
All these are the hydrides of 6 th group elements in which the central atom undergo $S P^{3}$ hybridization and should posses the bond angle 109 degree but the bond angle distorts due to the repusions between lone pair and lone pair. But this repulsions are minimum in $H_{2}$ Te as the tellurium has large size which makes the repulsions minimum. Hence option D is correct.
| ${H_2}O$ | ${H_2}S$ | $H_2Se$ | ${H_2}Te$ |
| ${104.5^o}$ | ${92.1^o}$ | ${91^o}$ |
${90^o}$ |
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