Medium
State whether the following statements are True or False:
$(i)$ The estimation of sulphur is detected by the weight of $BaSO_4$.
$(ii)$ $BaCl_2$ is added in the estimation of sulphur.
$(iii)$ The Carius tube is used in the estimation of sulphur.
$(iv)$ The magnesium mixture is added in the estimation of sulphur.
$(i)$ The estimation of sulphur is detected by the weight of $BaSO_4$.
$(ii)$ $BaCl_2$ is added in the estimation of sulphur.
$(iii)$ The Carius tube is used in the estimation of sulphur.
$(iv)$ The magnesium mixture is added in the estimation of sulphur.
(A) $(i) - \text{True}, (ii) - \text{True}, (iii) - \text{True}, (iv) - \text{False}$.
Explanation:
$(i)$ In the Carius method,sulphur is oxidized to $H_2SO_4$,which is then precipitated as $BaSO_4$. The weight of $BaSO_4$ is used to calculate the percentage of sulphur.
$(ii)$ $BaCl_2$ is added to the solution to precipitate sulphate ions as $BaSO_4$.
$(iii)$ $A$ Carius tube is a sealed glass tube used for the digestion of organic compounds with fuming nitric acid.
$(iv)$ The magnesium mixture is used for the estimation of phosphorus,not sulphur.
Explanation:
$(i)$ In the Carius method,sulphur is oxidized to $H_2SO_4$,which is then precipitated as $BaSO_4$. The weight of $BaSO_4$ is used to calculate the percentage of sulphur.
$(ii)$ $BaCl_2$ is added to the solution to precipitate sulphate ions as $BaSO_4$.
$(iii)$ $A$ Carius tube is a sealed glass tube used for the digestion of organic compounds with fuming nitric acid.
$(iv)$ The magnesium mixture is used for the estimation of phosphorus,not sulphur.
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Similar Questions
Which method uses an instrument called a nitrometer?
Easy
View SolutionThe Kjeldahl method of nitrogen estimation fails for which of the following reaction products $?$
$(a)$ Nitrobenzene $\xrightarrow{Sn/HCl}$ Aniline
$(b)$ Benzonitrile $\xrightarrow{LiAlH_4}$ Benzylamine
$(c)$ Benzyl cyanide $\xrightarrow{(i) SnCl_2 + HCl, (ii) H_2O}$ Phenylacetaldehyde
$(d)$ Aniline $\xrightarrow{NaNO_2/HCl}$ Benzenediazonium chloride
$(a)$ Nitrobenzene $\xrightarrow{Sn/HCl}$ Aniline
$(b)$ Benzonitrile $\xrightarrow{LiAlH_4}$ Benzylamine
$(c)$ Benzyl cyanide $\xrightarrow{(i) SnCl_2 + HCl, (ii) H_2O}$ Phenylacetaldehyde
$(d)$ Aniline $\xrightarrow{NaNO_2/HCl}$ Benzenediazonium chloride
Given below are two statements $I$ and $II.$
Statement $I :$ Dumas method is used for estimation of Nitrogen in an organic compound.
Statement $II :$ Dumas method involves the formation of ammonium sulphate by heating the organic compound with conc $H_2SO_4$. In the light of the above statements,choose the correct answer from the options given below.
Statement $I :$ Dumas method is used for estimation of Nitrogen in an organic compound.
Statement $II :$ Dumas method involves the formation of ammonium sulphate by heating the organic compound with conc $H_2SO_4$. In the light of the above statements,choose the correct answer from the options given below.
State True or False for the following statements:
$(i)$ The volume of $N_2$ is measured by nitrometer.
$(ii)$ The weight of $N_2$ is measured by nitrometer.
$(iii)$ The weight of $NH_3$ is measured by nitrometer.
$(iv)$ The volume of $NH_3$ is measured by nitrometer.
$(i)$ The volume of $N_2$ is measured by nitrometer.
$(ii)$ The weight of $N_2$ is measured by nitrometer.
$(iii)$ The weight of $NH_3$ is measured by nitrometer.
$(iv)$ The volume of $NH_3$ is measured by nitrometer.
Medium
View Solution$A$ sample of $0.50 \, g$ of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in $50 \, mL$ of $0.5 \, M \, H_{2}SO_{4}$. The residual acid required $60 \, mL$ of $0.5 \, M \, NaOH$ solution for neutralisation. Find the percentage composition of nitrogen in the compound. (in $\%$)
Medium
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