Chemistry · JEE

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

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Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus focus drill
Solve 15 mixed MCQs for Quantitative analysis (basic principles only): Estimation of carbon, hydrogen, nitrogen, halogens, sulphur and phosphorus, review every explanation, and note formulas you hesitated on.
NCERT line recall
For Inorganic, exact NCERT phrasing often matches the correct option — highlight one-liners during revision.
Balance then compare
In Physical Chemistry numericals, write the balanced relation first, then substitute values with units.

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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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