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A balck powder when heated with Conc. HC...

A balck powder when heated with Conc. HCI gives a greenish yellow. Gas. The gas as an oxidising and bleaching agent. When it is passed over slake lime, a white poweder is formed which is a ready source of gas. The back powder and white powder respectively are

A

`KCIO_(3) and NaCIO_(3)`

B

`MnO_(2) and Ca(OCI)_(2)`

C

`MnO_(2) and KCIO_(3)`

D

`MnCI_(4) and COCI_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`underset(("Black"))underset("Slaked lime")(MnO_(2))+underset("Conc.")(4HCI) to MnCI_(2) +2H_(2)O+underset("Greenish Yellow gas")(CI_(2))`
`CI_(2)+H_(2)O to 2HCI+[O]`
Coloured matter `+[O] to`
Colourless matter
`underset("Slaked lime")(2a(OH)_(2))+2CI_(2) to underset("Bleaching poweder (white)")(Ca(OCI)_(2))+CaCI_(2)+2H_(2)O`
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