X g of nitrobenzene on nitration gave 4.2 g of m-dinitrobenzene.
$X =$ ______ g. (nearest integer)
[Given : molar mass (in $g mol^{- 1}$ ) $C : 12, H : 1$ , $O : 16, N : 14]$

Question

X g of nitrobenzene on nitration gave 4.2 g of m-dinitrobenzene. X = ______ g. (nearest integer) [Given : molar mass (in g mol − 1 ) C : 12 , H : 1 , O : 16 , N : 14 ]

TestHub · Accepted Answer

C 6 ​ H 5 ​ NO 2 ​ MW = 123 ​ MF = C 6 ​ H 4 ​ N 2 ​ O 4 ​ MW = 168 ∴ 168 4.2 ​ = 0.025 mol ​ ∵ required gm of nitro benzene ​ = 123 × 0.025 = 3.075 ​ ∴ Nearest integer is 3

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