The decreasing basic order of the following compounds is:
$i . {N H}_{3}$ $i i . {P H}_{3}$ $i i i . A s H_{3}$ $i v . S b H_{3}$

(i) > (i i) > (i i i) > (i v)

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(i v) > (i i i) > (i i) > (i)

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(i i) > (i) > (i i i) > (i v)

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(i i) > (i) > (i v) > (i i i)

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Solution

The correct option is A $(i) > (i i) > (i i i) > (i v)$
The basic character of hydrides of 15 group decreases down the periodic table because size increases down the group and LP $¯ ¯ ¯ e$ density decreases.
${N H}_{3} > {P H}_{3} > A s H_{3} > S b H_{3}$

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The decreasing basic order of the following compounds is:i.NH3 ii.PH3 iii.AsH3 iv.SbH3

The correct option is A (i)>(ii)>(iii)>(iv)The basic character of hydrides of 15 group decreases down the periodic table because size increases down the group and LP ¯¯¯e density decreases.NH3>PH3>AsH3>SbH3

The decreasing basic order of the following compounds is:
$i . {N H}_{3}$ $i i . {P H}_{3}$ $i i i . A s H_{3}$ $i v . S b H_{3}$

The correct option is A $(i) > (i i) > (i i i) > (i v)$
The basic character of hydrides of 15 group decreases down the periodic table because size increases down the group and LP $¯ ¯ ¯ e$ density decreases.
${N H}_{3} > {P H}_{3} > A s H_{3} > S b H_{3}$