Use of hot air balloons in sports and for meteorological observations is an application of
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(a) Boyle’s law (b) Newton’s law (c) Kelvin’s law (d) Charle’s law
Correct Answer:
Charle’s law
Explanation: […]
The atmospheric pressure is sum of the
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(a) pressure of the biomolecules (b) vapour pressure of atmospheric constituents (c) vapour pressure of chemicals and vapour pressure of volatiles (d) pressure created on […]
Helium is used in balloons in place of hydrogen because it is
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(a) radioactive (b) more abundant than hydrogen (c) incombustible (d) lighter than hydrogen
Correct Answer:
incombustible
Explanation:
Helium is used […]
A gas deviates from ideal behaviour at a high pressure because its molecules
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(a) have kinetic energy (b) are bound by covalent bonds (c) attract one another (d) show the Tyndall effect
In the equation of state of an ideal gas PV = nRT, the value of the universal gas constant would depend only on
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(a) the nature of the gas (b) the pressure […]
The pressure and temperature of 4 dm³ of carbon dioxide gas are doubled. Then the volume of carbon dioxide gas would be
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(a) 2 dm³ (b) 3 dm³ (c) 4 dm³ (d) […]
Kinetic theory of gases presumes that collision between the molecules to be perfectly elastic because
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(a) collisions will not split the molecule (b) the molecules are tiny (c) the molecules are rigid […]
Which of the following molecules has the largest root mean square velocity at 25°C
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(a) NH₃ (b) SO₂ (c) H₂S (d) CO₂
Correct Answer:
NH₃
Explanation:
Temperature= 25⁰C, R.M.S velocity (ν r.m.s) […]
A helium, molecule is two times heavier than a hydrogen molecule at 298 K. The average kinetic energy of a helium molecule is
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(a) 2 times that of hydrogen molecule (b) half […]
At what pressure a gas, which occupies 100 mL at a pressure of 720 mm, will occupy a volume of 84 mL
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(a) 820.20 mm (b) 736.18 mm (c) 857.14 mm (d) […]
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