Class 11 Chemistry · Chapter 6 · Test 1
Thermochemistry Chapter 6
This 35-question MCQ test covers Chapter 6. It has 0 exercise MCQs and 35 topic-based MCQs from sections 6.1 to 6.11. Each question is worth 1 mark, for a total of 35 marks
35 questions · 30 min · 35 marks
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Sample questions
The first 5 of 35. Try each one, then tap to see the answer.
Question 1
The sum of all the possible potential and kinetic energies of a system is called its:
- AEntropy
- BHeat content (enthalpy)
- CActivation energy
- DLattice energy
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Answer: B
The text defines the sum of all possible potential and kinetic energies of a system as its heat content or enthalpy (H).
Question 2
A chemical reaction or physical change in which heat is absorbed by the system from the surroundings is called:
- AExothermic process
- BEndothermic process
- CIsothermal process
- DAdiabatic process
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Answer: B
The text states that a process in which heat is absorbed by the system from the surroundings is an endothermic process.
Question 3
Which relation is correct for an endothermic process?
- AHP < HR
- BHP > HR
- CHP = HR
- DHP = 0
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Answer: B
In an endothermic process the enthalpy of products is greater than that of reactants (HP > HR) as heat is absorbed.
Question 4
A process in which heat is released to the surroundings is called:
- AEndothermic process
- BExothermic process
- CIsothermal process
- DAdiabatic process
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Answer: B
A process in which heat is given out to the surroundings is called an exothermic process (HP < HR).
Question 5
The energy barrier that must be overcome by reactant molecules is called:
- AEnthalpy of reaction
- BEnergy of activation
- CLattice energy
- DBond energy
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Answer: B
The energy barrier required by reactant molecules to react is called the energy of activation.
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