Question 51. Which of the following is an exothermic reaction?

Question 52. Which of the following is not a unit of pressure?

Question 53. Pick out the wrong unit conversion of temperature.

Question 54. Degrees of freedom will be equal to the number of components for a system comprising of

Question 55. On mixing 56 gm of CaO with 63 gm of HNO₃, the amount of Ca(NO₃)₂ formed is __________ gm.

Question 56. Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are PvB and Pvw respectively. The partial pressure of benzene in air-vapour mixture is

Question 57. According to the kinetic theory, the thermal conductivity of a monoatomic gas is proportional to

Question 58. How much O₂ can be obtained from 90 kg of water?

Question 59. Atoms of the same element, but of different masses are called

Question 60. Which of the following has the smallest least effect on the solubility of a solute into the solvent?