Bond angle is minimum for - Vidyadip

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.

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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