- (a)3
- (b)2
- (c)1
- (d)0
Mole Concept and Stoichiometry
Appeared in 10 of the 11 available papers.
Appears almost every year — treat as core
Average per paper it appears in · 110 marks in total
43% of this chapter's 79 questions
2 questions carry a figure — practise drawing them
Question-type distribution
- Numerical34
- Short answer28
- MCQ11
- Definition3
- Fill in the blank3
Most frequent topics
Showing 25 of 79 matching questions (110 marks).
25 questions
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
- (a)10 litres
- (b)15 litres
- (c)20 litres
- (d)25 litres
Identify the following terms / compounds:
Complete the following sentences by choosing the correct option from the brackets:
An unsaturated hydrocarbon having two carbon atoms was made to react with two moles of hydrogen gas in the presence of a catalyst to give a saturated hydrocarbon. Using the above information, answer the following questions:
Zn + 4HNO₃ → Zn(NO₃)₂ + 2H₂O + 2NO₂ 32.5 g of zinc reacts with concentrated nitric acid as given in the above equation. [Atomic weight: H=1, N=14, O=16, Zn=65]
Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
- (a)CH₄
- (b)C₂H₄
- (c)C₂H₆
- (d)C₃H₈
The reaction between concentrated sulphuric acid and magnesium can be represented by the equation given below: Mg + 2H₂SO₄ ⟶ MgSO₄ + 2H₂O + SO₂ If 60 g of magnesium is used in the reaction, calculate the following:
A gas cylinder can hold 150 g of hydrogen under certain conditions of temperature and pressure. If an identical cylinder with the same capacity can hold 450 g of gas ‘G’ under the same conditions of temperature and pressure, find:
Given below are organic compounds labelled A to F. Answer the questions that follow:

Choose the correct answers to the questions from the given options. (Do not copy the questions, write the correct answers only.)
- (a)1 & 2
- (b)1 & 3
- (c)2 & 3
- (d)1, 2 & 3 [Atomic weights: O = 16, H = 1, N = 14]
State the terms for the following:
Define the following terms: