NEET Chemistry Chapter Wise Mock Test – Chemical Thermodynamics
Question 1:
For which process change in internal energy and enthalpy is zero?
(a) Cyclic process
(b) Reversible process
(c) Isochoric process
(d) Isobaric process
Question 2:
Question 3:
Question 4:
Question 5:
Question 6:
Work done by system is equaj^to the same extent as the internal energy of an ideal- gas decreases, the process is
(a) cyclic
(b) isothermal
(c) adiabatic
(d) isolated
Question 7:
In a process 701 J of heat is absorbed by a system and 394 J of work is done by the system. The change in internal energy for the process will be
(a) 307 J
(b) 502 J
(c) 701 J
(d) -394 J
Question 8:
Question 9:
Question 10:
Question 11:
Question 12:
Question 13:
Question 14:
Question 15:
The heat of combustion of carbon to C02 is -393 kJ/mol. The heat released upon formation of 35.2 g of CO2 from carbon and oxygen gas is
(a) + 315 kJ
(b) -31.5 kJ
(c)-315kJ
(d)+31.5kJ
Question 16:
Question 17:
Question 18:
Question 19:
Question 20:
Question 21:
Question 22:
Enthalpy change for a reaction does not depend upon
(a) the physical states of reactants and products
(b) use of different reactants for the same product
(c) the nature of intermediate reaction steps
(d) the differences in initial or final temperature of involved substances
Question 23:
The volume of gas is reduced to half from its original volume. The specific heat will be [NCERT Exemplar]
(a) reduced to half
(b) doubled
(c) remains constant
(d) increases 4 times
Question 24:
Question 25:
Question 26:
Maximum entropy will be in which of the following?
(a) Ice
(b) Liquid water
(c) Snow
(d) Water vapours
Question 27:
Question 28:
Question 29:
Question 30:
Question 31:
Question 32:
Question 33:
Question 34:
Question 35:
Question 36:
Question 37:
Question 38:
Identify the correct statement regarding entropy.
(a) At 0°C, the entropy of a perfectly crystalline substance is taken to be zero
(b) At absolute zero of the temperature, the entropy of all perfectly crystalline substance is positive
(c) At absolute zero of temperature, the entropy of all crystalline substance is taken to be zero
(d) At absolute zero of temperature, the entropy of a perfectly crystalline substance is taken to be zero
Direction (Q. NOS. 39-40) In the following questions more than one of the answers given may be correct. Select the correct answers and mark it according to the codes.
Codes
(a) 1, 2 and 3 are, correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct
Question 39:
Question 40:
The following is (are) endothermic reaction(s)
1. decomposition of water
2. dehydrogenation of ethane to ethylene
3. conversion of graphite to diamond
4. combustion of methane
Question 41:
Question 42:
Direction (Q. Nos. 43-47) Each of these questions contains two statements : Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c),and (d) given below.
(a) Assertion is true, Reason is true; Reason is a correct explanation for Assertion
(b) Assertion is true, Reason is true; Reason is not a correct explanation for Assertion
(c) Assertion is true, Reason is false
(d) Assertion is false, Reason is true
Question 43:
Assertion The mass and volume of a substance are the extensive properties and are proportional to each other.
Reason The ratio of mass of a sample to its volume is an intensive property.
Question 44:
Assertion For isothermal expansion of an ideal gas, its enthalpy decreases.
Reason Enthalpy does not depend upon temperature.
Question 45:
Question 46:
Assertion Spontaneous process is an irreversible process and may be reversed by some external agency.
Reason Decrease in enthalpy is a contributor for spontaneity.
Question 47:
Assertion The heat adsorbed during isothermal expansion of an ideal gas against vacuum is zero.
Reason The volume occupied by the molecule is zero
Question 48:
Question 49:
Question 50:
Question 51:
Question 52:
Question 53:
Question 54:
Question 55:
Question 56:
Question 57:
Question 58:
Which of the following is an intensive property?
(a) Temperature
(b) Viscosity
(c) Surface tension
(d) All of these
Question 59:
Work done during isothermal expansion of one mole of an ideal gas from 10 atm to 1 atm at 300 K is
(a) 4938.8 J
(b) 4138.8 J
(c) 5744.1 J
(d) 6257.2 J
Question 60:
Question 61:
Question 62:
Question 63:
Question 64:
Question 65:
Answers:
Hints and Solutions