Question types

Some Basic Concepts of Chemistry question types

148 questions across 5 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

148
Questions
5
Question groups
5
Question types
Sample Questions

Some Basic Concepts of Chemistry questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark
Mass of one molecule of oxygen in amu and in gram respectively is
  • A
    $53 \cdot 13 \times 10^{-24} \mathrm{u}, 32 \mathrm{~g}$
  • B
    $42 \mathrm{u}, 5 \cdot 313 \times 10^{-24} \mathrm{~g}$
  • C
    $16 \mathrm{u}, 6.0 \times 10^{-24} \mathrm{~g}$
  • $32 \mathrm{u}, 53 \cdot 13 \times 10^{-24} \mathrm{~g}$

Answer: D.

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Q 2MCQ1 Mark
How many mole of oxygen gas at STP are equivalent to 5.6 litre?
  • A
    $\frac{1}{8}$ mole
  • B
    $\frac{1}{2}$ mole
  • C
    1 mole
  • $\frac{1}{4}$ mole

Answer: D.

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Q 3MCQ1 Mark
What quantity of oxygen is required for complete burning of 15.6 g benzene?
  • A
    75 g
  • B
    88 g
  • 48 g
  • D
    64 g

Answer: C.

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Q 4MCQ1 Mark
Find the quantity of dihydrogen required to prepare $2 \mathrm{~L}$ ammonia gas from $1 \mathrm{~L}$ dinitrogen.
  • A
    $2 \mathrm{~L}$
  • B
    $1 \mathrm{~L}$
  • $3 \mathrm{~L}$
  • D
    $\frac{3}{2} \mathrm{~L}$

Answer: C.

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Q 5MCQ1 Mark
What is the volume occupied by $2 \mathrm{~g}$ of helium gas (molar mass $=4 \mathrm{~g} \mathrm{~mol}^{-1}$ ) at STP ?
  • A
    $2.0 \mathrm{dm}^3$
  • $11.2 \mathrm{dm}^3$
  • C
    $22.4 \mathrm{dm}^3$
  • D
    $5.6 \mathrm{dm}^3$

Answer: B.

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