NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Easy

1 of 1

Analyzing +4 | -1

Assertion: The value of enthalpy of neutralization of weak acid and strong base is numerically less than

57.1 {~kJ}

.

Reason: All the

{OH}^{-}

ions furnished by

1 {~g}

equivalent of strong base are not completely neutralized.

View answer and explanation

Correct option: C

If Assertion is correct but Reason is incorrect.

Option C is correct. The assertion is correct because the enthalpy of neutralization of a weak acid and strong base is less than 57.1 kJ due to the energy required to ionize the weak acid. The reason is incorrect because strong bases are completely ionized.

More Questions from THERMODYNAMICS

Practice All Chapter MCQs →

The internal energy of one mole of a gas is: An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If

{T_i}

is the initial temperature and

{T_f}

is the final temperature, which of the following statements is correct? For which of the process, ∆S is negative? The work done by a weightless piston in causing an expansion ∆V (at constant temperature), when the opposing pressure, P is variable, is given by: Assertion :- At constant pressure of the change

\mathrm{H}_2 \mathrm{O}(\mathrm{s}) \rightarrow \mathrm{H}_2 \mathrm{O}(\mathrm{g})

work done is negative.

Reason :- During phase transition work done is always negative. For the reaction,

\mathrm{X}_2 \mathrm{O_4(l}) \longrightarrow 2 \mathrm{XO}_2(\mathrm{g}), \Delta U=2.1 \mathrm{~kcal}, \Delta S=20 \mathrm{~cal} \mathrm{~K}^{-1}

300 \mathrm{~K}

. Hence,

\Delta G