Acidity of diprotic acids in aqueous solutions increases in the order [2014]

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Q.
Acidity of diprotic acids in aqueous solutions increases in the order [2014]

1 $H_{2} S < H_{2} Se < H_{2} Te$

2 $H_{2} Se < H_{2} S < H_{2} Te$

3 $H_{2} Te < H_{2} S < H_{2} Se$

4 $H_{2} Se < H_{2} Te < H_{2} S$

Ans.
(1)

As the atomic size increases down the group, the bond length increases and the bond strength decreases and the cleavage of E–H bond becomes easier thus, more will be the acidity. Thus, the correct order is: $H_{2} S < H_{2} Se < H_{2} Te$ .

Solution

Q.
Acidity of diprotic acids in aqueous solutions increases in the order [2014]

1 $H_{2} S < H_{2} Se < H_{2} Te$

2 $H_{2} Se < H_{2} S < H_{2} Te$

3 $H_{2} Te < H_{2} S < H_{2} Se$

4 $H_{2} Se < H_{2} Te < H_{2} S$

Ans.
(1)

As the atomic size increases down the group, the bond length increases and the bond strength decreases and the cleavage of E–H bond becomes easier thus, more will be the acidity. Thus, the correct order is: $H_{2} S < H_{2} Se < H_{2} Te$ .

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Solution

Q. Acidity of diprotic acids in aqueous solutions increases in the order [2014]

1 H2S<H2Se<H2Te

2 H2Se<H2S<H2Te

3 H2Te<H2S<H2Se

4 H2Se<H2Te<H2S

Ans. (1) As the atomic size increases down the group, the bond length increases and the bond strength decreases and the cleavage of E–H bond becomes easier thus, more will be the acidity. Thus, the correct order is: H2S<H2Se<H2Te.

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Q.
Acidity of diprotic acids in aqueous solutions increases in the order [2014]

1 $H_{2} S < H_{2} Se < H_{2} Te$

2 $H_{2} Se < H_{2} S < H_{2} Te$

3 $H_{2} Te < H_{2} S < H_{2} Se$

4 $H_{2} Se < H_{2} Te < H_{2} S$

Ans.
(1)

As the atomic size increases down the group, the bond length increases and the bond strength decreases and the cleavage of E–H bond becomes easier thus, more will be the acidity. Thus, the correct order is: $H_{2} S < H_{2} Se < H_{2} Te$ .