Enthalpy of Neutralization of Strong Acid and Strong Base NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Enthalpy of Neutralization of Strong Acid and Strong Base MCQ Questions


1.
Heat of neutralization of HCl by NH₄OH is -51.5 kJ/mol. The heat of ionization of NH₄OH is:
A.
+57.1 kJ/mol
B.
-5.6 kJ/mol
C.
-108.6 kJ/mol
D.
+5.6 kJ/mol
😑 View Answer Rough Work Error
ANSWER :
D. +5.6 kJ/mol
2.
Why is enthalpy more useful than internal energy in neutralization at constant pressure?
A.
At constant P, q_p = ΔH directly (easy to measure with simple calorimeter)
B.
Internal energy is undefined
C.
Internal energy is too large
D.
Enthalpy is smaller
😑 View Answer Rough Work Error
ANSWER :
A. At constant P, q_p = ΔH directly (easy to measure with simple calorimeter)
3.
Acid spilled on skin during the experiment should be:
A.
Ignored
B.
Immediately washed with plenty of water, then with dilute NaHCO₃ solution
C.
Treated with strong NaOH
D.
Wiped with cloth
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ANSWER :
B. Immediately washed with plenty of water, then with dilute NaHCO₃ solution
4.
In the cooling curve method, the temperature is recorded:
A.
Only at the end
B.
Only at maximum
C.
At constant intervals during reaction only
D.
At regular intervals before, during, and after mixing
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ANSWER :
D. At regular intervals before, during, and after mixing
5.
Which of the following gives the lowest magnitude of enthalpy of neutralization (least exothermic)?
A.
Weak acid + Weak base (CH₃COOH + NH₄OH ≈ -50.4 kJ/mol)
B.
Weak acid + Strong base
C.
Strong acid + Strong base
D.
Strong acid + Weak base
😑 View Answer Rough Work Error
ANSWER :
A. Weak acid + Weak base (CH₃COOH + NH₄OH ≈ -50.4 kJ/mol)
6.
Why does specific heat of dilute solution closely match that of pure water?
A.
All solutions are equal
B.
Solution is mostly water (>95% by mass for dilute); solute contribution is small
C.
Salt has same specific heat
D.
Dilution doesn't matter
😑 View Answer Rough Work Error
ANSWER :
B. Solution is mostly water (>95% by mass for dilute); solute contribution is small