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1 g sample of KClO(3) was heated under s...

1 g sample of `KClO_(3)` was heated under such conditions that a part of it decomposed according to the equation :
`2KClO_(3) rarr 2KCl + 3O_(2)` and the remaining underwent change according to the equation : `4KClO_(3)rarr 3KClO_(4)+KCl`
If the amount of `O_(2)` evolved was 146.8 ml at S.T.P., calculate the approximate % by weight of `KClO_(4)` in the reside.

A

50%

B

55%

C

45%

D

50%

Text Solution

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The correct Answer is:
A
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1 g sample of KClO_(3) was heated under such conditions that a part of it decomposed according to the equation : 2KClO_(3) rarr 2KCl + 3O_(2) and the remaining underwent change according to the equation : 4KClO_(3)rarr 3KClO_(4)+KCl If the amount of O_(2) evolved was 146.8 ml at S.T.P., calculate the % by weight of KClO_(4) in the reside.

A 1 - g sample of KClO_(3) was heated under such conditions that a part of it decomposed according to the equation (i) 2KCiO_(3) = 2 KCl + 3O_(2) and the remaining underwent change accurding to the eqation : (ii) 4KCIO_(3) = 3KCIO_(4) + KCI If the amount of O_(2) evelved was 146.8 mL, at NTP, calculate the percentage by weight of KClO_(4) in the residue .

Knowledge Check

  • For the reaction, 2KClO_(3)rarr2KCl+3O_(2) , which statements (s) are (are) correct?

    A
    It is disproprtionation
    B
    It is intramolecular redox change
    C
    `Cl` atoms are reduced
    D
    Oxygen atoms are oxidised

  • The decomposition of KClO_(3) to KCl and O_(2) on heating is an example of :

    A
    Intermolecular redox change
    B
    Intermolecular redox change
    C
    Disproportionation or auto redox change
    D
    None

  • According to the equation : 4NH_(3)(g)+5O_(2)(g)rarr 4NO(g+6H_(2)O(1) when 1 mole of O_(2) and 1 mole of ammonia are mixed, then

    A
    0.2 mol of `H_(2)O` is produced
    B
    0.1 mol of
    C
    all the oxygen will be consumed
    D
    all the ammonia will be consumed in order to form 1 mole NO

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    1.0g sample of KCl_3 was heated under such condition that a part of it decomposed according to the equation. 2KClO_3to2KCl+3O_2 and the remaining underwent change according to the equation. 4KClO_3to3KClO_4+KCl . If the amount of O_2 evolved was 145.8 mL at STP. Calculate the percentage by weight of KClO_4 in the residue.

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