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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

`KClO_(3) and NaClO_(3)`

B

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

C

`MnO_(2) and KClO_(3)`

D

`MnCl_(4) and COCl_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
`underset("powder")underset("Black")(MnO_(2))+underset("(conc.)")(4HCl)rarrMnCl_(2)+2H_(2)O+underset("yellow gas")underset("Greenish")(Cl_(2))Cl_(2)+H_(2)Orarr2HCl+[O]" Coloured matter"+[O]rarr" Colourless matter "`
`underset("lime")underset("Slaked")(2Ca(OH)_(2))+2Cl_(2)rarrunderset("(white)")underset("powder")underset("Bleaching")(Ca(OCl)_(2))+CaCl_(2)+2H_(2)O`
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