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The metal salt A is blue in colour. When...

The metal salt A is blue in colour. When salt A is heated strongly over a burner, then a substance B is eliminated and a white powder C is left behind. When a few drops of a liquid D are added to powder C, it becomes blue again. What could be A, B,C and D?

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A is copper sulphate pentahydrate, `CuSO_(4).5H_(2)O,` B is water, `H_(2)O`, C is anhydrous copper sulphate, `CuSO_(4)`, D is water, `H_(2)O`
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Iron powder and sulphur powder were mixed together were mixed together and divided into two parts A and B. when part A was heated strongly over a burner , then a substance C was formed , the part B was however , not heated at all .when dilute hydrochloric acid was added to substance C , then gas D was evolved and when dilute hydrochloric acid was added to part B them gas E was evolved . (a) what type of substance is B ? (b) what type of substance is c? (c ) Name the gas (i ) D, and (ii) E (d) state one characteristic property fo gas D. (e ) Write one test to identify gas E.

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Knowledge Check

  • When A + Water to C + B, B is reacted with D, gas C again obtained. 'D' gives 'C' with H_(2)SO_(4) . B gives yellow colour with bunsen flame. C is a flamable gas then what would be A, B, C and D :

    A
    `K, H_(2), NaOH, Zn`
    B
    `Na, NaOH, H_(2), Zn`
    C
    `Li, H_(2), LiOH, Zn`
    D
    None of the above

  • When borax bead containing a small amount of metal salt ws heated in reducing flame of bunsane burner, the colour of the bead after heating was blue . The metal presen in the salt would be

    A
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    B
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    C
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    D
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