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Match the following Column-I with Column-II
Column-I Column-II
a) $S O_{2}$ p) Turns acidified $K_{2} C r_{2} O_{7}$ solution green
b) $C O_{2}$ q) Turns blue litmus red
c) $H_{2} S$ r) Turns lime water milky
d) $H_{2} O_{2}$ s) Used for restoring old paintings in museums

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$a \to p, q, r; b \to q, s; c \to q, r; d \to s$

$a \to p, q, r; b \to q, r; c \to p, q; d \to p, s$

$a \to p; b \to q, s; c \to q, r; d \to p$

$a \to r; b \to p, q; c \to r; d \to p, s$

answer is B.

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Detailed Solution

$S O_{2}$ -

p)	Turns acidified $K_{2} C r_{2} O_{7}$ solution green
q)	Turns blue litmus red
r)	Turns lime water milky

$C O_{2}$ -Turns blue litmus red

Turns lime water milky

$H_{2} S$ -

p)	Turns acidified $K_{2} C r_{2} O_{7}$ solution green
q)	Turns blue litmus red

$H_{2} O_{2}$ -

p)	Turns acidified $K_{2} C r_{2} O_{7}$ solution green

s)	Used for restoring old paintings in museums

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