Skip to main content
Back to THERMODYNAMICS

NEET UG CHEMISTRY MCQ: THERMODYNAMICS

1 Medium
1 of 1
Analyzing +4 | -1
Consider the following reactions :

C(s)+O2( g)⟶CO2( g)+x kJ\mathrm{C}(s)+\mathrm{O}_2(\mathrm{~g}) \longrightarrow \mathrm{CO}_2(\mathrm{~g})+x \mathrm{~kJ}

CO(g)+12O2(g)⟶CO2(g)+y kJ\mathrm{CO}(g)+\frac{1}{2} \mathrm{O}_2(g) \longrightarrow \mathrm{CO}_2(g)+y \mathrm{~kJ}

The heat of formation of CO(g)\mathrm{CO}(g) is :
View answer and explanation
Correct option: C
(y−x)kJ/mol(y-x) \mathrm{kJ} / \mathrm{mol}
Option C is correct. The heat of formation of CO(g) can be calculated by subtracting the second reaction from the first, resulting in (y-x) kJ/mol.

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 Ti{T_i} is the initial temperature and Tf{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 H2O(s)→H2O(g)\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, X2O4(l)⟶2XO2(g),ΔU=2.1 kcal,ΔS=20 cal K−1\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} at 300 K300 \mathrm{~K}. Hence, ΔG\Delta G is
Type at least 2 characters or jump directly:
🩺 NEET MCQs 🔬 JEE MCQs 🎯 JEE College Predictor Study guides 📊 Dashboard
🔓

Save your learning progress

Sign in with a free account to save your practice answers and quiz results, then return to them when you revise.

Continue with Free Account →