KVPY SX SB Exam 2018 Question Paper

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Question : 41 of 120

Marks: +1, -0

CHEMISTRY

The amount (in mol) of bromoform

(CHBr_3)

produced when 1.0 mol of acetone reacts completely with 1.0 mol of bromine in the presence of aqueous NaOH is

$1/ 3$
$2/3$
1
2

Solution:

CH – C↖{||} ↖{O}– CH_3\ { ––––––▸}↖{3\Br_2}↙{4\NaOH}CH_3 – C↖{||} ↖{O} – ONa

+ CHBr_3

3

Br_2

Gives 1 mol of

CHBr_3

1 \mol Br_2 { ––––––––} {1/3 } \CHBr_3

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