Chemistry · JEE

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

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The most important Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus questions for JEE cover conceptual traps, standard results, and numerical patterns from Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus. Goodmarks provides 9+ high-yield MCQs with full solutions.

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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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