Last seen: Oct 19, 2020
(a) increases with increase in temperature Explanation: The internal energy of a substance increases with increase in temperature due to increase ...
(c) 5.3 kJ/mol Explanation: Enthalpy of neutralisation of CH3COOH by NaOH is -50.6 kJ/mole ; for strong acid and base this value is 55.9 kJ/mole. ...
(c) 372.56 cal Explanation: ΔH = ΔE + PΔV [PV = RT; PΔV = RΔT, ΔE = ΔCv x (T2 - T1)] = 3/2R x 75 + R x 75 = 75 x 5/2 = 372.56 cal
(c) - 1257.43 cal Explanation: Work done in expansion of gas = -2.303 nRT log P1/P2 = -2.303 × 1 × 2 × 273 log 10/1 = - 1257.43 cal
(c) – 213 J Explanation: W = -∫V2 V1PdV = -P(V2 - V1) W = –(1 atm) (20 – 10) = –10 dm3 atm. = -10dm3 x 8.314 J/K/mol/ 0.08206dm3 /K/mol = -1...
(d) Energy due to gravitational pull Explanation: Internal Energy of a gas consists of (i) kinetic energy of gas molecules (ii) potential energy o...
(a) Increases Explanation: For a spontaneous process, the entropy should increase.
(b) 0.64 k cal Explanation: Formation of glucose will be the given by reaction taking place in reverse direction. 6CO2 + 6H2O + 72Cal → C6H12O6 ...
(d) – 1.13 kJ Explanation: P(red) + 5/2O2 → P2O5; ΔH = -8.78 P(yellow) + 5/2O2 → P2O5; ΔH = -9.91 P(red) + 5/2O2 - 5/2O2 → P2O5 - P2O5 P (Re...
(a) Monoatomic Explanation: We know that, Molar heat capacity at constant volume, Cv = Specific heat at constant volume × Mol. wt. = 0.075 × 4...
(a) (x + y) Explanation: S + O2 → SO2 + x .....(1) SO2 + 1/2O2 → SO3 + y ....(2) Adding (i) and (ii), we have S + O2 + SO2 + 1/2O2 → ...
(c) different intermediate reactions Explanation: Enthalpy change of a reaction does not depend upon different intermediate reactions. ΔH = Hp -...
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect. Explanation: Z can be greater than 1 or less than 1. Non - ideal gases exert less pressure th...
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion. Explanation: Both assertion and reason are true a...
(c) If Assertion is correct but Reason is incorrect. Explanation: When the temperature is raised, the molecules of the dissolved gas present in a ...
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. Explanation: In case of hydrogen, Z increas...
(d) If both the Assertion and Reason are incorrect. Explanation: All molecules of a gas are identical in shape and size, but have different energi...
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion. Explanation: Use of pressure cooker reduces...