Acidic dichromate ion reacts with hydrogen peroxide to give deep blue colour. This is due to the formation of

Question

Acidic dichromate ion reacts with hydrogen peroxide to give deep blue colour. This is due to the formation of (A) CrO(O)2 (B) CrO 5 (C) Both (a) and (b) (D) None of (a) and (b)

Tardigrade Admin · Accepted Answer

When cold H 2 O 2 is added in cold mixture of K 2 Cr 2 O 7 and conc. H 2 SO 4 (i.e. K 2 Cr 2 O 7 in acidic medium), a deep blue solution of blue perchromate is obtained as, K 2 Cr 2 O 7+ H 2 SO 4 arrow K 2 SO 4+ H 2 Cr 2 O 7 H 2 Cr 2 O 7+4 H 2 O 2 arrow underset textBlue per chromate2 CrO 5+5 H 2 O

Q. Acidic dichromate ion reacts with hydrogen peroxide to give deep blue colour. This is due to the formation of

$C r O (O)_{2}$

$C r O_{5}$

Both (a) and (b)

None of (a) and (b)

Q. Acidic dichromate ion reacts with hydrogen peroxide to give deep blue colour. This is due to the formation of

CrO(O)2​

CrO5​

Both (a) and (b)

None of (a) and (b)

$C r O (O)_{2}$

$C r O_{5}$