Question

List-I	List-ll
(A) $O_3$	(1) Turns benzidine paper to brown
(B) Hypo	(2) Turns anhydrous ${CuSO}_4$ to blue
(C) $H_{2}O$	(3) Violet colour with $FeC{l}_3$
(D) $H_{2}S$	(4) Rotten egg smell

The correct match is :

• A. A-2, B-3, C-1, D-4
• B. A-4, B-2, C-3, D-1
• C. A-1, B-3, C-2, D-4
• D. A-3, B-4, C-2, D-1

Answer 1

The correct option is C A-1, B-3, C-2, D-4

$O_3$ turns benzidine paper to brown colour.
Hypo gives violet colour with $FeC{l}_3$.
Water ($H_{2}O$) turns anhydrous $CuS{O}_4$ blue by forming pentahydrate. The reaction is as follows $CuS{O}_4+H_{2}O\to CuS{O}_4.5H_{2}O$
$H_{2}S$ has rotten egg smell.