Last seen: Oct 19, 2020
(e) If the Assertion is incorrect but the Reason is correct. Explanation: Wet air is lighter than dry air because density of air is more than wate...
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. Explanation: Gases do not settle to the bot...
(d) If both the Assertion and Reason are incorrect. Explanation: Ice does not melt faster at high altitude because melting is favoured at high pre...
(c) 282.68 g Explanation: n = PV/RT = m/M m = MPV/RT = (34 x 2 x 100)/(0.082 x 293) = 282.68 g
(d) 1 only Explanation: Given, P1 = 15 atm, P2 = 60 atm V1 = 76 cm3, V2 = 20.5 cm3 If the gas is an ideal gas, then according to Boyle's law, ...
(d) 170/570 = 0.30 Explanation: By ideal gas equation P1V = n1RT n1 ∝ P1 and n2 ∝ P2 n1/n2 = P1/P2 => n1/n2 = 170/570 = 0.30
(d) CO2 Explanation: CO2 has highest critical temperature of 304.2 K.
(b) near the hydrogen chloride bottle. Explanation: Rate of diffusion ∝ √(1/Molecular mass) ∵ Molecular mass of HCl > Molecular mass of NH3 ...
(d) CO2 > SO2 > SO3 > PCl3 Explanation: Rate ∝ √1/M. The smaller the value of M the more is the rate of diffusion.
(b) 20 seconds : O2 Explanation: For effusion of same volume, t1/t2 = M1/M2 => t1/√M1 = t2/√M2 This is clearly seen from the options that t...
(b) Below critical temperature, thermal motion of the molecules is slow enough for the intermolecular forces to come into play leading to condensation...
(b) 220 Explanation: Gases become cooler during Joule Thomson’s expansion only if they are below a certain temperature known as inversion temperat...
(a) p1 > p3 > p2 Explanation: From the graph we can see the correct order of pressures p1 > p3 > p2
(a) A Explanation: Critical temperature of a gas is given by TC = 8a/27Rb => a ∝TC where a is measure of vander Waal's forces of attraction...
(c) Equilibrium between gas and liquid Explanation: Generally most of real gases show the same type of isotherm. ab represents the gaseous state...
(b) Depends on Z and indicated by Z > 1 Explanation: Repulsive force will decrease the compressibility factor i.e. so, value of Z > 1 as Z...
(a) P ∝ ρ Explanation: P ∝ 1/V and m/V = ρ; 1/V = ρ/m So, P ∝ ρ/m i.e. Pressure ∝ ρ
(c) (P + a/TV2)(V - b) = RT Explanation: (P + a/TV2)(V - b) = RT is Berthelot equation. The volume correction is same as in van der Waal's equatio...
(b) 1.2 atm Explanation: Let the wt. of each gas mixed = x g ∴ mole of SO2 = x/64 mole of CH4 = x/16 mole of O2 = x/32 Total number of mol...
(a) Diffusion Explanation: Diffusion is the process by which matter is transported in small quantities.