Mole Concept and Stoichiometry ICSE Class 10 Chemistry — Chapter-wise PYQs & Important Questions

Examined in

10 of 11 papers

Appears almost every year — treat as core

Typically worth

11 marks

Average per paper it appears in · 110 marks in total

Usual form

Numerical

43% of this chapter's 79 questions

Needs a diagram

3%

2 questions carry a figure — practise drawing them

Question-type distribution

Numerical34
Short answer28
MCQ11
Definition3
Fill in the blank3

Most frequent topics

Mole concept, gas volumes and stoichiometry 71Stoichiometry and quantitative calculations 6Percentage composition 1Organic compounds: nomenclature, structure and reactions 1

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Showing 4 of 79 matching questions (110 marks).

4 questions

5(a)

A gas cylinder contains 12 x 1024 molecules of oxygen gas. If Avogadro's number is 6 x 1023; Calculate:

5(a)(i)2016

NumericalModerate1 mark

the mass of oxygen present in the cylinder.

5(a)(ii)2016

NumericalModerate1 mark

the volume of oxygen at S.T.P. present in the cylinder. [O=16]

5(b)2016

NumericalModerate3 marks

A gaseous hydrocarbon contains 82.76% of carbon. Given that its vapour density is 29, find its molecular formula. [C=12, H=1]

NumericalModerate3 marks

The equation : 4NH₃ + 5O₂ ⟶ 4NO + 6H₂O represents the catalytic oxidation of ammonia. If 100 cm³ of ammonia is used calculate the volume of oxygen required to oxidize the ammonia completely.

Mole Concept and StoichiometryICSE Class 10 Chemistry — chapter-wise previous year questions

Question-type distribution

Most frequent topics