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NEET 2026
Exam
NEET
Year
2026
Subject
Physics
Chapter
Chapter

NEET 2026 · Physics · Chapter

Suppose the intermolecular forces in 1.7 kg of liquid ammonia (...

Suppose the intermolecular forces in 1.7 kg1.7\text{ kg} of liquid ammonia (NH3NH_3) completely vanish, causing it to behave as an ideal gas. The volume occupied by this gas at standard temperature and pressure (STP) will be:

Options

  1. A2.24×10−3 m32.24 \times 10^{-3}\text{ m}^3
  2. B2.24 m32.24\text{ m}^3
  3. C22.4 m322.4\text{ m}^3
  4. D2.24×103 m32.24 \times 10^3\text{ m}^3

Correct answer

B. 2.24 m32.24\text{ m}^3

Step-by-step solution

Mass of NH3=1.7 kg=1700 gNH_3 = 1.7\text{ kg} = 1700\text{ g}

Molar mass of NH3=14+3=17 g/molNH_3 = 14 + 3 = 17\text{ g/mol}

Number of moles n=170017=100 moln = \dfrac{1700}{17} = 100\text{ mol}

Volume of 1 mole1\text{ mole} of an ideal gas at STP is 22.4 L=22.4×10−3 m322.4\text{ L} = 22.4 \times 10^{-3}\text{ m}^3

Total volume V=n×22.4×10−3 m3V = n \times 22.4 \times 10^{-3}\text{ m}^3

V=100×22.4×10−3 m3=2.24 m3V = 100 \times 22.4 \times 10^{-3}\text{ m}^3 = 2.24\text{ m}^3

Answer: 2.24 m32.24\text{ m}^3
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