Which of the following molecules has the largest root mean square velocity at 25°C
Options
(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
Options
(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
Options
(a) 820.20 mm (b) 736.18 mm (c) 857.14 mm (d) […]
If the ratio of the rates of diffusion of two gases A and B is 4 : 1. Then the ratio of their densities in the same order is
Options
(a) 16 : […]
Which of the following statement is not correct
Options
(a) The units of surface tension are dynes cm⁻¹ (b) The units of viscosity coefficient of a liquid are ”Poise” (c) CsCI crystallizes in […]
The boiling point of water decreases at higher altitudes because
Options
(a) the atmospheric pressure is low (b) the temperature is low (c) the atmospheric pressure is high (d) the temperature is high
Measurement of the dry gas from the volume of moist gas is based on
Options
(a) Boyle’s law (b) Avogadro’s law (c) Gay Lussac’s law (d) Dalton’s law of partial pressure
Correct […]
A real gas most closely approaches the behaviour of an ideal gas at
Options
(a) 15 atm and 200 K (b) 1 atm and 273 K (c) 0.5 atm and 500 K (d) […]
To which of the followings the Dalton’s law of partial pressure is not applicable
Options
(a) H₂ and He (b) NH₃ and HCl (c) N₂ and H₂ (d) N₂ and O₂
Correct Answer: […]
What is the pressure of 64g O₂ enclosed in a cylinder of 20 litres at 27⁰C
Options
(a) 2.5 atm (b) 2 atm (c) 2.75 atm (d) 3 atm
Correct Answer:
2.5 atm
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