K 2 Cr 2 O 7 paper acidified with dilute H 2 SO 4 turns green when exposed to

Question

K 2 Cr 2 O 7 paper acidified with dilute H 2 SO 4 turns green when exposed to (A) Hydrogen sulphide (B) Sulphur dioxide (C) Carbon dioxide (D) Sulphur trioxide

Tardigrade Admin · Accepted Answer

3 SO 2+ Cr 2 O 72-+2 H + arrow 3 SO 42-+ underset textgreen2 Cr +3+ H 2 O

Q. $K_{2} C r_{2} O_{7}$ paper acidified with dilute $H_{2} S O_{4}$ turns green when exposed to

Hydrogen sulphide

Sulphur dioxide

Carbon dioxide

Sulphur trioxide

$3 S O_{2} + C r_{2} O_{7}^{2 -} + 2 H^{+} \to 3 S O_{4}^{2 -} + green 2 C r^{+ 3} + H_{2} O$

Q. K2​Cr2​O7​ paper acidified with dilute H2​SO4​ turns green when exposed to