Surface tension vanishes at
Options
(a) boiling point (b) critical point (c) condensation point (d) triple point
Correct Answer:
critical point
Explanation:
At critical point, the meniscus between the liquid and the vapour […]
How many calories are required to heat 40 gram of argon from 40⁰C to 100⁰C at constant volume? ( R = 2 cal/mol.K)
Options
(a) 120 (b) 2400 (c) 1200 (d) 180
Correct […]
6.4 g SO₂ at 0⁰C and 0.99 atm pressure occupies a volume of 2.24 L. Predict which of the following is correct
Options
(a) the gas is ideal (b) the gas is real […]
What is kinetic energy of 1 g of O₂ at 47⁰C
Options
(a) 1.24 ˣ 10² J (b) 2.24 ˣ 10² J (c) 1.24 ˣ 10³ J (d) 3.24 ˣ 10² J
Correct […]
The kinetic energy of a gas molecule is … temperature
Options
(a) independent of (b) directly proportional to (c) inversely proportional to (d) directly proportional to square root of
Correct Answer:
directly proportional […]
Which among the following gas will greatly deviate from Henry’s law in water
Options
(a) H₂ (b) N₂ (c) CH₄ (d) CO₂
Correct Answer:
CO₂
Explanation:
Gases obey Henry’s law provided (i) the […]
Use of hot air balloons in sports and for meteorological observations is an application of
Options
(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
Options
(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
Options
(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
Options
(a) have kinetic energy (b) are bound by covalent bonds (c) attract one another (d) show the Tyndall effect
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