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1
MHT CET 2025 20th April Morning Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the enthalpy of vaporisation of ethanol if 11.5 g of ethanol is completely vaporised by supplying 11.8 kJ of heat.

A
$21.7 \mathrm{~kJ} \mathrm{~mol}^{-1}$
B
$47.2 \mathrm{~kJ} \mathrm{~mol}^{-1}$
C
$65.1 \mathrm{~kJ} \mathrm{~mol}^{-1}$
D
$39.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$
2
MHT CET 2025 19th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the enthalpy change of vaporisation of benzene if 13 gram of benzene vaporised by supplying 5.1 kJ of heat.

A
$43.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$
B
$35.3 \mathrm{~kJ} \mathrm{~mol}^{-1}$
C
$30.6 \mathrm{~kJ} \mathrm{~mol}^{-1}$
D
$40.7 \mathrm{~kJ} \mathrm{~mol}^{-1}$
3
MHT CET 2025 19th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the entropy change of surrounding if 2 moles of $\mathrm{H}_2$ and 1 mole of $\mathrm{O}_2$ gas combine to form 2 moles of liquid water by releasing 525 kJ heat to surrounding at constant pressure and at 300 K .

A
$1700 \mathrm{~J} \mathrm{~K}^{-1}$
B
$1750 \mathrm{~J} \mathrm{~K}^{-1}$
C
$1800 \mathrm{~J} \mathrm{~K}^{-1}$
D
$1650 \mathrm{~J} \mathrm{~K}^{-1}$
4
MHT CET 2025 19th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following reactions exhibits decrease in entropy?

A

$2 \mathrm{H}_2 \mathrm{O}_{2(l)} \longrightarrow 2 \mathrm{H}_2 \mathrm{O}_{(l)}+\mathrm{O}_{2(\mathrm{~g})}$

B

$\mathrm{H}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{H}_{(\mathrm{g})}$

C

$\mathrm{CaCO}_{3(\mathrm{~s})} \xrightarrow{\Delta} \mathrm{CaO}_{(\mathrm{s})}+\mathrm{CO}_{2(\mathrm{~g})}$

D

$2 \mathrm{H}_{2(\mathrm{~g})}+\mathrm{O}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{H}_2 \mathrm{O}_{(\mathrm{l})}$

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