Enthalpy of Solution of CuSO4 NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Enthalpy of Solution of CuSO4 MCQ Questions


7.
Sign convention: heat absorbed BY the system is taken as:
A.
Positive (+q)
B.
Equal to work done
C.
Negative (−q)
D.
Zero
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ANSWER :
A. Positive (+q)
8.
In an exothermic process, ΔH is:
A.
Zero
B.
Always equal to ΔU
C.
Positive
D.
Negative
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ANSWER :
D. Negative
9.
Endothermic process is one in which:
A.
No heat change occurs (ΔH = 0)
B.
Heat is absorbed by system from surroundings (ΔH > 0)
C.
Temperature of surroundings rises
D.
Heat is released by system (ΔH < 0)
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ANSWER :
B. Heat is absorbed by system from surroundings (ΔH > 0)
10.
Enthalpy is defined as:
A.
H = U × PV
B.
H = U + PV
C.
H = U / PV
D.
H = U − PV
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ANSWER :
B. H = U + PV
11.
Relation between ΔH and ΔU is:
A.
ΔH = ΔU + ΔnRT (for ideal gas reactions)
B.
ΔH = ΔU × ΔnRT
C.
ΔH = ΔU − ΔnRT
D.
ΔH = ΔU + nRT
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ANSWER :
A. ΔH = ΔU + ΔnRT (for ideal gas reactions)
12.
In a reaction occurring in solution (no gases), ΔH ≈ ΔU because:
A.
Heat and work are equal
B.
Internal energy is always zero
C.
Δn(gas) = 0 and PV term is negligible for liquids/solutions
D.
Solutions have no enthalpy
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ANSWER :
C. Δn(gas) = 0 and PV term is negligible for liquids/solutions