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Q.

Select the correct statement from the following.

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a

Pentahalides of elements of 15th group are more covalent than trihalides

b

only N-atom binary compound with metals in -3 oxidation state

c

Most of the compounds of nitrogen only among all compounds of elements of group 15 are suffocating and Poisonous

d

All of the above are correct

answer is A.

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Detailed Solution

In higher +ve oxidation state an atom has higher polarising power(more covalent) than its lower +ve oxidation state.
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