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Question: The correct decreasing order basic strength of the following species is \_\_\_\_\_\_\_\_\_. \(\math...

The correct decreasing order basic strength of the following species is _________.

H2O,NH3,OH−,NH2−\mathrm { H } _ { 2 } \mathrm { O } , \mathrm { NH } _ { 3 } , \mathrm { OH } ^ { - } , \mathrm { NH } _ { 2 } ^ { - }

A

NH2−>OH−>NH3>H2O\mathrm { NH } _ { 2 } ^ { - } > \mathrm { OH } ^ { - } > \mathrm { NH } _ { 3 } > \mathrm { H } _ { 2 } \mathrm { O }

B

OH−>NH2−>H2O>NH3\mathrm { OH } ^ { - } > \mathrm { NH } _ { 2 } ^ { - } > \mathrm { H } _ { 2 } \mathrm { O } > \mathrm { NH } _ { 3 }

C

NH3>H2O>NH2−>OH−\mathrm { NH } _ { 3 } > \mathrm { H } _ { 2 } \mathrm { O } > \mathrm { NH } _ { 2 } ^ { - } > \mathrm { OH } ^ { - }

D

H2O>NH3>OH−>NH2−\mathrm { H } _ { 2 } \mathrm { O } > \mathrm { NH } _ { 3 } > \mathrm { OH } ^ { - } > \mathrm { NH } _ { 2 } ^ { - }

Answer

NH2−>OH−>NH3>H2O\mathrm { NH } _ { 2 } ^ { - } > \mathrm { OH } ^ { - } > \mathrm { NH } _ { 3 } > \mathrm { H } _ { 2 } \mathrm { O }

Explanation

Solution

: OH−\mathrm { OH } ^ { - } thus decreasing order of basic strength is NH2−>OH−>NH3>H2O\mathrm { NH } _ { 2 } ^ { - } > \mathrm { OH } ^ { - } > \mathrm { NH } _ { 3 } > \mathrm { H } _ { 2 } \mathrm { O }