Chemistry questions
29404 published questions with worked solutions.
- If a chemical reaction is accompanied by the evolution of heat, it is __________ [BHU 1979]
- A thermodynamic state function is a quantity
- If W is the amount of work done by the system and q is the amount of heat supplied to the system, identify the type of the system.
- A process in which the system does not exchange heat with the surroundings is known as
- Which of the given properties depends on the manner in which a change is brought about? (i) E (ii) q (iii) W
- Which is correct for an endothermic reaction?
- Which of the following is the correct expression for the change in internal energy used for general case ?
- For the equilibrium, A(g) B(g) , H is -40 kJ/mol. If the ratio of the activation energies of the forward (E_f) and reverse (E_b)...
- How many joules of heat are absorbed when 70.0 g of water is completely vaporised at its boiling point?
- Change in internal energy, when 4 kJ of work is done on the system and 1 kJ of heat is given out by the system, is
- Select the correct formula about the change in enthalpy.
- Select the correct formula for _ sol H^ .
- Which of the following is not an endothermic reaction?
- In the reaction, S + 32 O_2 SO_3 + 2 x kJ and SO_2 + 12 O_2 SO_3 + y kJ. Heat of formation of SO_2 is
- In the given reaction, Na(s) Na(g) . The enthalpy of atomisation is same as the
- In the following process, H_2(g) 2H(g) , _ H-H H^ = 435.0 kJ ,mol^ -1 . The enthalpy change involved is the
- Enthalpy of solution of NaOH (solid) in water is -41.6 kJ ,mol^ -1 . When NaOH is dissolved in water, the temperature of water
- U^ for combustion of methane is -X kJ ,mol^ -1 . The value of H^ is
- Two moles of an ideal gas is expanded isothermally and reversibly from 1 L to 10 L at 300 K. The enthalpy change (in kJ) for the...
- For the given reaction, CH_4(g) + 2O_2(g) CO_2(g) + 2H_2O(l) Select the correct option for _rH.