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The correct order of bond angles of the following compounds is

Options

  1. AH 2 O < H 2   S < H 2 Se < H 2 Te
  2. BH 2   S < H 2 O < H 2 Se < H 2 Te
  3. CH 2 Se < H 2   S < H 2 O < H 2 Te
  4. DH 2 Te < H 2 Se < H 2   S < H 2 O

Correct answer

D. H 2 Te < H 2 Se < H 2   S < H 2 O

Step-by-step solution

As we move down to the group, the size of the central metal ion will increase and due to this the bond pair-bond pair repulsion will go on decreasing and therefore the two small hydrogen come closer to each other and so it causes decrease in H - M - H bond angle and hence the bond angle will decrease down to the group as shown below : H 2 O > H 2 S > H 2 Se > H 2 Te

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