The correct order of decreasing thermal stability of the hydrides of group 16 elements is

Question

The correct order of decreasing thermal stability of the hydrides of group 16 elements is (A) H 2 S > H 2 Te > H 2 Po > H 2 O > H 2 Se (B) H 2 Se > H 2 S > H 2 Po > H 2 O > H 2 Te (C) H 2 O > H 2 Se > H 2 Te > H 2 S > H 2 Po (D) H 2 O > H 2 S > H 2 Se > H 2 Te > H 2 Po

Tardigrade Admin · Accepted Answer

As the size of the element increases down the group, the E- H bond dissociation energy decreases and hence E- H bond breaks more easily. Thus, the thermal stability of the hydrides of group 16 elements decreases down the group, i.e., H 2 O > H 2 S > H 2 Se > H 2 Te > H 2 Po .

Q. The correct order of decreasing thermal stability of the hydrides of group 16 elements is

$H_{2} S > H_{2} T e > H_{2} P o > H_{2} O > H_{2} S e$

$H_{2} S e > H_{2} S > H_{2} P o > H_{2} O > H_{2} T e$

$H_{2} O > H_{2} S e > H_{2} T e > H_{2} S > H_{2} P o$

$H_{2} O > H_{2} S > H_{2} S e > H_{2} T e > H_{2} P o$

As the size of the element increases down the group, the $E - H$ bond dissociation energy decreases and hence $E - H$ bond breaks more easily. Thus, the thermal stability of the hydrides of group 16 elements decreases down the group, i.e., $H_{2} O > H_{2} S > H_{2} S e > H_{2} T e > H_{2} P o .$

Q. The correct order of decreasing thermal stability of the hydrides of group 16 elements is

H2​S>H2​Te>H2​Po>H2​O>H2​Se

H2​Se>H2​S>H2​Po>H2​O>H2​Te

H2​O>H2​Se>H2​Te>H2​S>H2​Po

H2​O>H2​S>H2​Se>H2​Te>H2​Po

As the size of the element increases down the group, the E−H bond dissociation energy decreases and hence E−H bond breaks more easily. Thus, the thermal stability of the hydrides of group 16 elements decreases down the group, i.e., H2​O>H2​S>H2​Se>H2​Te>H2​Po.

$H_{2} S > H_{2} T e > H_{2} P o > H_{2} O > H_{2} S e$

$H_{2} S e > H_{2} S > H_{2} P o > H_{2} O > H_{2} T e$

$H_{2} O > H_{2} S e > H_{2} T e > H_{2} S > H_{2} P o$

$H_{2} O > H_{2} S > H_{2} S e > H_{2} T e > H_{2} P o$

As the size of the element increases down the group, the $E - H$ bond dissociation energy decreases and hence $E - H$ bond breaks more easily. Thus, the thermal stability of the hydrides of group 16 elements decreases down the group, i.e., $H_{2} O > H_{2} S > H_{2} S e > H_{2} T e > H_{2} P o .$