Chemistry Question Bank

The number of sigma electrons in toluene are

Which of the following represents the given mode of hybridisation sp -sp -sp-sp from left to right ? (a) H C CH C N

The IUPAC name of the following compound is

Which of the following orders is correct for the stability of these carbocations ?

The molecular formula of diphenyl methane is C 13H How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom?

The geometrical isomerism is shown by (a) (b) (c) (d)

The type of isomerism observed in urea molecule is

Among the plots of P versus V, as given below, which one corresponds to Boyle’s law ? (a) (b) (c) (d)

Calculate the number of moles in the glass bulb shown in figure at 300 K. Given : density of glycerine = 2.72 g/mL; density of mercury = 13.6g/mL

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 : 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.

Assertion :Kinetic energy and momentum of ideal gas molecules are conserved during intermolecular collision. Reason :Collision among real gas molecules is inelastic.

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: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…

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…

NH₃ can be liquefied at ordinary temperature without the application of pressure. But O₂ cannot, because

For NH₃ gas Z < 1. So the volume occupied by one mole of NH₃ (Vm) at STP is

Five grams each of the following gases at 87 °C and 750 mm pressure are taken. Which of them will have the least volume ?