1.

A crystalline solid X reacts with dil HCI to liberate a gas Y. Y decolourises acidified KMnO4. Whena gas 'Z' is slowly passed into an aqueous solution of Y, colloidal sulphur is obtained. X and Z could be, respectively

Answer»

`Na_2S, SO_3`
`Na_2SO_4, H_2S`
`Na_2SO_3 , H_2S`
`Na_2SO_4, SO_2`

SOLUTION :`Na_2SO_3 + 2HCL to 2NaCl + H_2O + SO_2`
` H_2O + SO_2 to H_2SO_3`
`H_2SO_3 + 2H_2S to 3S + 3H_2O`


Discussion

No Comment Found

Related InterviewSolutions