(A) Mass of organic compound $= 0.25 \, g$ Pressure of dry nitrogen gas $(P_1) = 725 \, mm - 25 \, mm = 700 \, mm$ Volume of nitrogen $(V_1) = 40 \, m

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(A) Mass of organic compound $= 0.25 \, g$ Pressure of dry nitrogen gas $(P_1) = 725 \, mm - 25 \, mm = 700 \, mm$ Volume of nitrogen $(V_1) = 40 \, mL$ Temperature $(T_1) = 300 \, K$ Using the ideal gas equation at $STP$ $(P_2 = 760 \, mm, T_2 = 273 \, K)$: $\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}$ $V_2 = \frac{700 \times 40 \times 273}{300 \times 760} = 33.52 \, mL$ Mass of $N_2$ at $STP = \frac{28 \times 33.52}{22400} = 0.0419 \, g$ Percentage of nitrogen $= \frac{0.0419}{0.25} \times 100 = 16.76 \%$

Class 11 Chemistry 8-3.Organic Chemistry : Purification and characterization Quantitative Analysis

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In Dumas's method for estimation of nitrogen,$0.25 \, g$ of an organic compound gave $40 \, mL$ of nitrogen collected at $300 \, K$ temperature and $725 \, mm$ pressure. If the aqueous tension at $300 \, K$ is $25 \, mm,$ the percentage of nitrogen in the compound is

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A
$16.76$
B
$15.76$
C
$17.36$
D
$18.20$

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8-3.Organic Chemistry : Purification and characterization

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In the $Kjeldahl$ method,when an organic compound containing nitrogen is heated with concentrated $H_2SO_4$,nitrogen is converted into which of the following?

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In the Dumas method,$1 \ g$ of an organic compound gives $50 \ mL$ of $N_2$ gas at $300 \ K$ and $740 \ mm \ Hg$ pressure. If the aqueous tension at $300 \ K$ is $15 \ mm \ Hg$,what is the percentage of nitrogen in the compound?

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$0.8 \ g$ of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be $42 \ \%$,then $.... \ mL$ of $1 \ M$ $H_2SO_4$ would have been neutralized by the ammonia evolved during the analysis.

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In Kjeldahl's method for the estimation of nitrogen,the formula used is

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Fill in the blanks:
$(1)$ .......... gas is produced in Kjeldahl's method and absorbed in ...........
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In Dumas's method for estimation of nitrogen,$0.25 \, g$ of an organic compound gave $40 \, mL$ of nitrogen collected at $300 \, K$ temperature and $725 \, mm$ pressure. If the aqueous tension at $300 \, K$ is $25 \, mm,$ the percentage of nitrogen in the compound is

Similar Questions

In the $Kjeldahl$ method,when an organic compound containing nitrogen is heated with concentrated $H_2SO_4$,nitrogen is converted into which of the following?

In the Dumas method,$1 \ g$ of an organic compound gives $50 \ mL$ of $N_2$ gas at $300 \ K$ and $740 \ mm \ Hg$ pressure. If the aqueous tension at $300 \ K$ is $15 \ mm \ Hg$,what is the percentage of nitrogen in the compound?

$0.8 \ g$ of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be $42 \ \%$,then $.... \ mL$ of $1 \ M$ $H_2SO_4$ would have been neutralized by the ammonia evolved during the analysis.

In Kjeldahl's method for the estimation of nitrogen,the formula used is

Fill in the blanks:$(1)$ .......... gas is produced in Kjeldahl's method and absorbed in ........... $(2)$ The excess $H_2SO_4$ is added in Kjeldahl's method and then the remaining $H_2SO_4$ is titrated with a calculated ..........

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Fill in the blanks:
$(1)$ .......... gas is produced in Kjeldahl's method and absorbed in ...........
$(2)$ The excess $H_2SO_4$ is added in Kjeldahl's method and then the remaining $H_2SO_4$ is titrated with a calculated ..........