61. If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.
62. The atomic heat capacities of all solid elements __________ with decrease in temperature.
63. At higher temperature, molal heat capacities of most of the gases (at constant pressure) __________ with increase in temperature.
64. At higher temperatures, molal heat capacities for most of the gases (at constant pressure) __________ with increase in temperature.
65. Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263°C and 2 atm.
66. 1 Pascal (unit of pressure) is equal to __________ N/m2.
67. The unit of specific heat at constant pressure, Cp, in SI unit is
68. Cp - Cv, for an ideal gas is equal to
69. With increase in temperature, the surface tension of water
70. The temperature of a gas in a closed container is 27° C. If the temperature of the gas is incresed to 300° C, then the pressure exerted is
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