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How many of the following will give deep blue colour with $F e_{(a g)}^{+ 3}$
in lassigne’s extract test ?

$N H_{2} N H_{2}, N H_{2} O H, C_{6} H_{5} N H_{2}, C_{6} H_{5} C H_{2} C O N H_{2}, C H_{3} C H_{2} N H_{2}, C_{6} H_{5} N_{2} C l$

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answer is C.

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Detailed Solution

N-present in $N H_{2} N H_{2}$ , $N H_{2} O H$ , $C_{6} H_{5} N_{2} C l$ cant be deleted using lassaigne’s extract

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