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0.9g of an organic compound gave on comb...

0.9g of an organic compound gave on combustion:
(i) `1.584g CO_(2)` (ii) `0.648g H_(2)O` When `0.24g` of the substance was Kjeldahlised and the ammonia formed was absorbed in `50 cm^(3)` of `(N)/(2)H_(2)SO_(4)`. The excess acid required `77 cm^(3)` of `N//10NaOh` for complete neutralization. Molecular mass of the compound is estimated to be 100.
The compound has maximum percentage composition of which of the following elements?

A

C

B

H

C

N

D

O

Text Solution

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The correct Answer is:
A
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0.45 gm of an organic compound gave on combution 0.792 gm of CO_2 and 0.324gm of water. 0.24 gm of the same substance was Kjeldahlised and the ammonia liberated was absorbed in 50.0 ml of (M)/(8H_2SO_4) . The excess acid required 77.0 ml of (N)/(10)NaOH for complete neutralisation. Calculate the empirical formula of the compound.

0.35 g of an organic acid was kjeldahlised and the ammonia obtained was passed into 100 cm^(3) of N//5H_(2)SO_(4) . The excess of the acid required 154 cm^(3) of N//10 NaOH for neutralisation. Calculate the percentage of nitrogen in the compound.

Knowledge Check

  • 0.9g of an organic compound gave on combustion: (i) 1.584g CO_(2) (ii) 0.648g H_(2)O When 0.24g of the substance was Kjeldahlised and the ammonia formed was absorbed in 50 cm^(3) of (N)/(2)H_(2)SO_(4) . The excess acid required 77 cm^(3) of N//10NaOh for complete neutralization. Molecular mass of the compound is estimated to be 100. Molecular formula of the compound will be:

    A
    `C_(8)H_(4)NO_(2)`
    B
    `C_(4)H_(8)N_(2)O`
    C
    `C_(4)H_(8)NO`
    D
    `C_(8)H_(4)NO`

  • 0.9g of an organic compound gave on combustion: (i) 1.584g CO_(2) (ii) 0.648g H_(2)O When 0.24g of the substance was Kjeldahlised and the ammonia formed was absorbed in 50 cm^(3) of (N)/(2)H_(2)SO_(4) . The excess acid required 77 cm^(3) of N//10NaOh for complete neutralization. Molecular mass of the compound is estimated to be 100. Percentage composition of nitrogen in the compound will be:

    A
    16
    B
    61
    C
    6
    D
    28

  • 0.9g of an organic compound gave on combustion: (i) 1.584g CO_(2) (ii) 0.648g H_(2)O When 0.24g of the substance was Kjeldahlised and the ammonia formed was absorbed in 50 cm^(3) of (N)/(2)H_(2)SO_(4) . The excess acid required 77 cm^(3) of N//10NaOh for complete neutralization. Molecular mass of the compound is estimated to be 100. What is the percentage composition of carbon in the compound?

    A
    0.16
    B
    0.08
    C
    0.28
    D
    0.48

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    0.2475g of an organic compound gave on combustion 0.4950 of CO_(2) and 0.2025g of H_(2)O calculate the % of C & H in it.

    0.9g of an organic compound gave on combustion: (i) 1.584g CO_(2) (ii) 0.648g H_(2)O When 0.24g of the substance was Kjeldahlised and the ammonia formed was absorbed in 50 cm^(3) of (N)/(2)H_(2)SO_(4) . The excess acid required 77 cm^(3) of N//10NaOh for complete neutralization. Molecular mass of the compound is estimated to be 100. Which among the following is the empirical formula of the compound?

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