JEE MAIN - Chemistry (2020 - 6th September Evening Slot - No. 10)
A solution of phenol in chloroform when treated
with aqueous NaOH gives compound P as a
major product. The mass percentage of carbon
in P is ______. (to the nearest integer)
(Atomic mass : C = 12; H = 1; O = 16)
(Atomic mass : C = 12; H = 1; O = 16)
Answer
69
Explanation
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mass of Salicylaldehyde = 12 × 7 + 6 × 1 + 16 × 2 = 122
mass of carbon = 12 × 7 = 84
$$ \therefore $$ mass % of C in P = $${{84} \over {122}}$$ $$ \times $$ 100
= 68.85 % $$ \simeq $$ 69 %
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