19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
For NH₃ gas Z < 1. So the volume occupied by one mole of NH₃ (Vm) at STP is
NH₃ can be liquefied at ordinary temperature without the application of pressure. But O₂ cannot, because
Which of the following is a correct plot of the volume of fixed amount of ideal gas as a function of temperature (at constant pressure) ? (a) (b) (c) (d)
Assertion:CH₄, CO₂ has value of Z (compressibility factor) less than one at 0ºC. Reason :Z < 1 is due to the attractive forces dominate among the molecules.
Assertion: Compressibility factor (Z) for non- ideal gases may be less than or greater than 1. Reason: Non-ideal gases always exert higher pressure than expected.
Assertion: For a real gas, the gas pressure is always less than the pressure calculated from kinetic theory of gases. Reason: In kinetic theory, both molecular volumes and intermolecular attractions were ignored.
Assertion :Gases do not liquefy above their critical temperature, whatever the high pressure is applied. Reason :Above critical temperature, molecular speed is high and intermolecular force cannot hold the molecules t…
Assertion :Above critical temperature liquid state cannot be observed. Reason :Above critical temperature, the average kinetic energy of a molecule is always greater than the maximum kinetic energy a molecule can poss…
Assertion :According to kinetic theory of gases, gas molecules occupy some space. Reason :Gases can be liquefied and solidified.
Assertion: A lighter gas diffuses more rapidly than a heavier gas. Reason: At a given temperature, the rate of diffusion of a gas is inversely proportional to the density.
Assertion: According to Charles’ law, for a give amount of an ideal gas at a given pressure, plot of gas volume versus absolute temperature is a straight line passing through origin. Reason: Gaseous volume never vanis…
Assertion :For a given amount of an ideal gas, a plot of pressure (p) versus (1/V) is a straight line at a constant temperature. Reason :A given amount of an ideal gas at a constant temperature obeys Boyle’s law.
Gases possess characteristic critical temperature which depends upon the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases Gases : H₂ He O₂ N₂ Critical tem…
Formation of London smog takes place in
The ozone layer is present in
The region which is greatly affected by air pollution is
Presence of which fuel gas in the exhaust fumes shows incomplete combustion of fuel
The substance having the largest concentration in acid rain?
The greatest affinity for haemoglobin is shown by which of the following
The greenhouse effect is caused by
The substance which is a primary pollutant?
The statement which is not true
Which forms the part of hazy fumes of photochemical smog
Which of the following is not involved in the formation of photochemical smog?
Formation of ozone in the upper atmosphere from oxygen takes place by the action of