General
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Chemistry-

Hydrogen can be obtained from water, by the action of water on

Chemistry-General

  1.  Calcium carbide
  2. Calcium hydride    

  3. Calcium oxide     
  4. Calcium

     

    Calcium

     Calcium    

    Answer:The correct answer is:

    Calcium


    Calcium

     CalciumCaH subscript 2 plus 2 straight H subscript 2 straight O not stretchy rightwards arrow Ca left parenthesis OH right parenthesis subscript 2 plus 2 straight H subscript 2 not stretchy upwards arrow

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    Ice is a poor conductor of heat (a good thermal insulator) and its density is less than water.
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    Reaction of NaBH subscript 4 with cold water is very slow. All other statements except (b) are correct.
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    straight H subscript 2 will not reduce heated Al subscript 2 straight O subscript 3

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    straight H subscript 2 will not reduce heated Al subscript 2 straight O subscript 3
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    Which of the following is/are hard water(s)

    Water containing any cation other than  NH subscript 4 superscript plus and alkali metal is a hard water

    Which of the following is/are hard water(s)

    chemistry-General
    Water containing any cation other than  NH subscript 4 superscript plus and alkali metal is a hard water
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    Hydrogen can be obtained from water by

    Mg plus 2 straight H subscript 2 straight O not stretchy rightwards arrow Mg left parenthesis OH right parenthesis subscript 2 plus straight H subscript 2 not stretchy upwards arrow
    LiH plus straight H subscript 2 straight O not stretchy rightwards arrow LiOH plus straight H subscript 2 not stretchy upwards arrow

    Hydrogen can be obtained from water by

    chemistry-General
    Mg plus 2 straight H subscript 2 straight O not stretchy rightwards arrow Mg left parenthesis OH right parenthesis subscript 2 plus straight H subscript 2 not stretchy upwards arrow
    LiH plus straight H subscript 2 straight O not stretchy rightwards arrow LiOH plus straight H subscript 2 not stretchy upwards arrow
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    HCl  is added to following oxides. Which one would give straight H subscript 2 straight O subscript 2

    MnO subscript 2 comma PbO subscript 2.and BaO will not give straight H subscript 2 straight O subscript 2 with HCl.MnO subscript 2 and PbO subscript 2 will give Cl subscript 2 and BaO will react with HCl to give BaCl subscript 2 and water

    HCl  is added to following oxides. Which one would give straight H subscript 2 straight O subscript 2

    chemistry-General
    MnO subscript 2 comma PbO subscript 2.and BaO will not give straight H subscript 2 straight O subscript 2 with HCl.MnO subscript 2 and PbO subscript 2 will give Cl subscript 2 and BaO will react with HCl to give BaCl subscript 2 and water
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    Which of the following pair will not produce dihydrogen gas

    text  Cu-and-dil.  end text times HCl times text  will-not-produce  end text minus straight H subscript 2 times straight F

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    chemistry-General
    text  Cu-and-dil.  end text times HCl times text  will-not-produce  end text minus straight H subscript 2 times straight F
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    Hydrogen peroxide is

    This is due to the formation of C r O subscript 5 end subscript.
    K subscript 2 end subscript C r subscript 2 end subscript O subscript 7 end subscript plus H subscript 2 end subscript S O subscript 4 end subscript plus 4 H subscript 2 end subscript O subscript 2 end subscript rightwards arrow K subscript 2 end subscript S O subscript 4 end subscript plus stack 2 C r O subscript 5 end subscript with text Blue end text below plus 5 H subscript 2 end subscript O

    Hydrogen peroxide is

    chemistry-General
    This is due to the formation of C r O subscript 5 end subscript.
    K subscript 2 end subscript C r subscript 2 end subscript O subscript 7 end subscript plus H subscript 2 end subscript S O subscript 4 end subscript plus 4 H subscript 2 end subscript O subscript 2 end subscript rightwards arrow K subscript 2 end subscript S O subscript 4 end subscript plus stack 2 C r O subscript 5 end subscript with text Blue end text below plus 5 H subscript 2 end subscript O
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    Zeolite when treated with hard water exchange  Cu to the power of plus 2 end exponent times text  and  end text times Mg to the power of plus 2 end exponent timesions (present in hard water) with  Na to the power of plus ions.

    When zeolite, which is hydrated sodium aluminium silicate, is treated with hard water the sodium ions are exchanged with

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    Zeolite when treated with hard water exchange  Cu to the power of plus 2 end exponent times text  and  end text times Mg to the power of plus 2 end exponent timesions (present in hard water) with  Na to the power of plus ions.

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