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 areA. `KClO_3` and `NaClO_3`B. `MnO_2` and `Ca(O Cl)_2`C. `MnO_2` and KClOD. `MnCl_4` and `COCl_2`

A balck powder when heated with Conc. HCI gives a greenish yellow. Gas

1.	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 areA. `KClO_3` and `NaClO_3`B. `MnO_2` and `Ca(O Cl)_2`C. `MnO_2` and KClOD. `MnCl_4` and `COCl_2`
Answer» Correct Answer - B `underset"Black powder"(MnO_2) + underset"conc."(4HCl) to MnCl_2 + 2H_2O + underset"Greenish yellow gas "(Cl_2)` `Cl_2 + H_2O to 2HCl + [O]` Coloured matter + [O] `to` colourless matter `underset"Slaked lime"(2Ca(OH)_2) + 2Cl_2 to underset"Bleaching powder (white)"(Ca(OCl)_2) + CaCl_2 + 2H_2O`

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