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The white solid compound A decomposes qu...

The white solid compound A decomposes quite repaidly on heating in the presence of a black substance form a solid compoind B and a gas C. When an aqueous solution of compoind B is reacted with silver nitrate solution, then a white precipitate of silver chloride is obtained alongwith potassium nitrate solution. Gas C does not burn itself but helps burn other things.
(a) What is compound A ?
(b) What is compoind B ?
(c ) What is gas C ?
(d) What do you think is the black substance X? What is its function ?
(e) What is the general name of substance like X ?

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The white solid compound A decomposes quite rapidly on heating in the presence of a black substance form a solid compound B and a gas C. When an aqueous solution of compound B is reacted with silver nitrate solution, then a white precipitate of silver chloride is obtained along with potassium nitrate solution. Gas C does not burn itself but helps burn other things. (a) What is compound A ? (b) What is compound B ? (c ) What is gas C ? (d) What do you think is the black substance X? What is its function ? (e) What is the general name of substance like X ?

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