Some of alkali metal salts are coloured. Na 2 CrO 4 - yellow, KMnO 4 - pink, K 2 MnO 4- green. It is due to

Question

Some of alkali metal salts are coloured. Na 2 CrO 4 - yellow, KMnO 4 - pink, K 2 MnO 4- green. It is due to (A) Cations are coloured ions (B) Anions are coloured ions (C) Both(a) (b) are correct (D) None of the above is correct

Tardigrade Admin · Accepted Answer

Alkali salts are colourless NaCl colourless Na 2 CrO 4-yellow since CrO 43- is yellow KCl colourless K 2 CrO 4 - yellow KMnO 4- pink since MnO 4-is pink K 2 MnO 4- green since MnO 42- is green

Q. Some of alkali metal salts are coloured. $N a_{2} C r O_{4} -$ yellow, $K M n O_{4} -$ pink, $K_{2} M n O_{4} -$ green. It is due to

Cations are coloured ions

Anions are coloured ions

Both(a) & (b) are correct

None of the above is correct

Alkali salts are colourless
$N a Cl$ colourless $N a_{2} C r O_{4}$ -yellow since $C r O_{4}^{3 -}$ is yellow
$K Cl$ colourless $K_{2} C r O_{4}$ - yellow
$K M n O_{4} -$ pink since $M n O_{4}^{-}$ is pink
$K_{2} M n O_{4} -$ green since $M n O_{4}^{2 -}$ is green

Q. Some of alkali metal salts are coloured. Na2​CrO4​− yellow, KMnO4​− pink, K2​MnO4​− green. It is due to