19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Assertion : The pressure of a gas is inversely proportional to the volume at constant temperature and n. Reason : The gas volume is directly proportional to n at constant temperature and pressure.
For NH₃ gas Z < 1. So the volume occupied by one mole of NH₃ (Vm) at STP is
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 :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…
Indicate which of the following statements are correct.
50 ml of gas A diffuses through a membrane in the same time as for the diffusion of 40 ml of a gas B under identical pressure- temperature conditions. If the molecular weight of A is 64 that of B would be
X ml of H₂ gas effuses through a hole in a container in 5 seconds. The time taken for the effusion of the same volume of the gas specified below under identical condition is
If the absolute temperature of a gas is doubled and the pressure is reduced to one-half, the volume of the gas will
How many O₂ molecules are present in 2.0 L of oxygen gas at 27 °C temperature and 3.0 atm pressure ?
Which of the following causes lung cancer
Phosphate pollution is caused by
Phosphate fertilizers when added to water leads to
Eutrophication causes reduction in
BOD is connected with
Water is often treated with chlorine to
The type of pollution caused by spraying of DDT
Which is true about DDT
The aromatic compounds present as particulates are
Which of the following statement is false?
Presence of which fuel gas in the exhaust fumes shows incomplete combustion of fuel
The region which is greatly affected by air pollution is