1
MHT CET 2024 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Find value of Q from following equations.

(i) $\mathrm{C}_{(\mathrm{s})}+\mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{CO}_{2(\mathrm{~g})} \Delta \mathrm{H}=\mathrm{QkJ}$

(ii) $\mathrm{C}_{(\mathrm{s})}+\frac{1}{2} \mathrm{O}_{2(8)} \longrightarrow \mathrm{CO}_{2(8)} \Delta \mathrm{H}=-\mathrm{x} \mathrm{kJ}$

(iii) $\mathrm{C}_{(\mathrm{s})}+\frac{1}{2} \mathrm{O}_{2(\mathrm{~s})} \longrightarrow \mathrm{CO}_{2(\mathrm{~g})} \Delta \mathrm{H}=-\mathrm{ykJ}$

A
$\mathrm{-(x+y) k J}$
B
$(\mathrm{x}-\mathrm{y}) \mathrm{kJ}$
C
$\frac{-\mathrm{x}+\mathrm{y}}{2} \mathrm{~kJ}$
D
$\frac{\mathrm{x}+\mathrm{y}}{2} \mathrm{~kJ}$
2
MHT CET 2024 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements is appropriate as per first law of thermodynamics?

A
Energy of the system remains constant.
B
Energy of the surrounding remains constant.
C
Entropy of the universe remains constant.
D
Energy of the universe remains constant.
3
MHT CET 2024 3rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0
 

Given that $$\mathrm{C}_{(\mathrm{g})}+4 \mathrm{H}_{(\mathrm{g})} \longrightarrow \mathrm{CH}_{4(\mathrm{g})} \Delta \mathrm{H}^{\circ}=-1665 \mathrm{~kJ}$$

What is bond energy per mole of $\mathrm{C}-\mathrm{H}$ bond?

A
$416 \mathrm{~kJ} \mathrm{~mol}^{-1}$
B
$-416 \mathrm{~kJ} \mathrm{~mol}^{-1}$
C
$832.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$
D
$-832.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$
4
MHT CET 2024 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If bond formation energy of $\mathrm{H}-\mathrm{H}$ bond is $-433 \mathrm{~kJ} \mathrm{~mol}^{-1}$ find the bond dissociation energy for 0.5 mole $H_{2(g)}$.

A
108.0 kJ
B
216.5 kJ
C
433.0 kJ
D
324.5 kJ
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