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The p-Block Elements

Short Answer Type

521. Write the balanced equation for complete hydrolysis of XeF₆.

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522. Predict the shape of ClF₃ on the basis of VSEPR theory.

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523. In which one of the two structures, NO₂^– and NO₂^–, the bond angle has a higher value?

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524. Which is a stronger acid in aqueous solutions, HF or HCl?

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525. Why is the bond angle in PH₃ molecule lesser than that in NH₃ molecule?

The bond pair in NH₃ is close to N in N–H bond than the bond pair in P–H bond in PH₃. This is because the size of the nitrogen is small than phosphorus. As a result, the force of repulsion between the bonded pair of electrons in PH₃ is more than in NH₃. Therefore, the bond angle in PH₃ molecule is lesser than that in NH₃molecule.

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