1
AP EAPCET 2025 - 26th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The number of extensive and intensive properties in the list given below is respectively, density, enthalpy, mass, temperature, volume, pressure

A

4,2

B

1,5

C

2,4

D

3,3

2
AP EAPCET 2025 - 26th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

One mole of ethanol ( $l$ ) was completely burnt in oxygen to form $\mathrm{CO}_2(\mathrm{~g})$ and $\mathrm{H}_2 \mathrm{O}(l)$. What is the $\Delta_r H^{\circ}$ (in $\mathrm{kJ} \mathrm{mol}^{-1}$ ) for this reaction?

(The standard enthalpy of formation $\left(\Delta_f H^{\circ}\right)$ of $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}(l), \mathrm{CO}_2(g)$ and $\mathrm{H}_2 \mathrm{O}(l)$ is respectively $-277,-393$ and $-286 \mathrm{~kJ} \mathrm{~mol}^{-1}$ )

A

+1921

B

-1921

C

+1367

D

-1367

3
AP EAPCET 2025 - 24th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $\Delta_r H^{\ominus}$ and $\Delta_r S^{\ominus}$ are standard enthalpy change and standard entropy change respectively for a reaction, the incorrect option is

A

$\Delta_r H^{\ominus}=$ negative; $\Delta_r S^{\ominus}=$ positive: spontaneous at all temperatures

B

$\Delta_1 H^{\ominus}=$ negative; $\Delta_1 S^{\ominus}=$ negative; non-spontaneous at low temperatures

C

$\Delta_r H^{\ominus}=$ positive; $\Delta_r S^{\ominus}=$ positive; non-spontaneous at low temperatures

D

$\Delta_r H^{\ominus}=$ negative; $\Delta_r S^{\ominus}=$ negative: spontaneous at low temperatures

4
AP EAPCET 2025 - 24th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The $\mathrm{C}_p$ of $\mathrm{H}_2 \mathrm{O}(l)$ is $75.3 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}$. What is the energy (in J ) required to raise 180 g of liquid water from $10^{\circ} \mathrm{C}$ to $15^{\circ} \mathrm{C}$ ? $\left(\mathrm{H}_2 \mathrm{O}=18 \mathrm{u}\right)$

A

3.765

B

3765

C

753

D

376.5

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