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Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus Revision for JEE

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1.Core idea: Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus
2.Relates to other subtopics in Purification and Characterisation of Organic Compounds
3.Crystallisation, distillation, chromatography
4.Detection of N, S, P, halogens
5.Master Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus definitions and standard results
6.Solve 20 timed MCQs for Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus

Syllabus context

Part of Purification and Characterisation of Organic Compounds in JEE Main Chemistry.

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Q1ChemistryUnit 13: Purification and Characterisation of Organic Compounds

1.6 \mathrm{g}

of an organic compound gave

2.6 \mathrm{g}

of magnesium pyrophosphate. The percentage of phosphorus in the compound is:

Q2ChemistryUnit 13: Purification and Characterisation of Organic Compounds

0.5 g

of an organic compound containing nitrogen on kjeldahlising required

29 m l

N / 5 H_{2} S O_{4}

for complete neutralisation of ammonia. The percentage of nitrogen in the compound is :

Q3ChemistryUnit 13: Purification and Characterisation of Organic Compounds

Which of the following statements is/are correct? This question has multiple correct options

Q4ChemistryUnit 13: Purification and Characterisation of Organic Compounds

In an estimation of sulphur by Carius method, 0.234 g of an organic sulphur compound afforded 0.334 g of

B a S O_{4}

Find the percentage of Sulphur in the compound.

Q5ChemistryUnit 13: Purification and Characterisation of Organic Compounds

Carbon and hydrogen are estimated in organic compounds by:

Q6ChemistryUnit 13: Purification and Characterisation of Organic Compounds

0.23 \mathrm{g}

of an organic compound gave 0.332 g of

B a S O_{4} .

Determine the

\%

of sulphur in the compound.

Q7ChemistryUnit 13: Purification and Characterisation of Organic Compounds

In Liebig's method for the estimation of

\mathrm{C}

and

\mathrm{H},

if the compound also contains both halogens and sulphur then which of the following is kept near the exit of the combustion tube?

Q8ChemistryUnit 13: Purification and Characterisation of Organic Compounds

A sample of 0.50 g of an organic compound was treated according to Kjeldahl's method. The ammonia evolved was absorbed in

50 \mathrm{mL}

0.5 \mathrm{M}

H_{2} S O_{4}

.The residue acid required

60 \mathrm{mL}

of 0.5 M solution of

N a O H

for neutralisation. What would be the percentage composition of nitrogen in the compound?

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