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Reductions Involving Aldehydes or Ketones

Which of the ...

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Which of the following bonds has the highest bond energy?why?(1) S-S(2) O-O(3) Se-Se(4) Te-Te

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Q. Consider the following statements regarding hydrides of VIA group elements.
i) The order of volatility

H_{2} O < H_{2} T e < H_{2} S e < H_{2} S

ii) The order of Boiling point

H_{2} O > H_{2} T e > H_{2} S e > H_{2} S

iii) The order of bond angles

H_{2} O > H_{2} S > H_{2} S e > H_{2} T e

Choose the correct option.

The increasing order of electron gain enthalpy of the following substances is:

O < S < S e < T e

If the order of bond dissociation enthalpy is correct, enter 1 else 0.

Q. Assertion :Oxygen is never more than divalent,as in

H_{2} O_{2}

. Reason: S, Se and Te can form four or six bonds,as in

S F_{6}

.

Q. Consider the following molecules :
(I)

H_{2} O

H_{2} S

H_{2} S e

H_{2} T e

Arrange these molecules in increasing order of bond angle.

Q. Arrange in decreasing order of boiling point

H_{2} S, H_{2} O, H_{2} S e, H_{2} T e

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