1
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In aqueous glucose solution, the mole fraction of wate is 40 times to mole fraction of glucose. What is the weight percentage $(w / w)$ of glucose in the solution?

A

40

B

30

C

20

D

10

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Benzoic acid molecules undergo dimerisation in benzene. 2.44 g of benzoic acid when dissolved in 30 g of benzene caused depression in freezing point of 2 K . What is the percentage of association of it?

(Given $K_f\left(\mathrm{C}_6 \mathrm{H}_6\right)=5 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$; molar mass of benzoic acid $=122 \mathrm{~g} \mathrm{~mol}^{-1}$ )

A

80

B

70

C

60

D

90

3
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

When the lead storage battery is in use (during discharge) the reaction that occurs at the anode is

A

$\mathrm{PbSO}_4(s)+2 \mathrm{H}_2 \mathrm{O}(l) \longrightarrow \mathrm{PbO}_2(s)+\mathrm{SO}_4^{2-}(a q)+4 \mathrm{H}^{+}(a q)+2 e^{-}$

B

$\mathrm{Pb}(s)+\mathrm{PbO}_2(s)+2 \mathrm{H}_2 \mathrm{SO}_4(a q) \longrightarrow 2 \mathrm{PbSO}_4(s)+2 \mathrm{H}_2 \mathrm{O}(l)$

C

$\mathrm{Pb}(s)+\mathrm{SO}_4^{2-}(a q) \longrightarrow \mathrm{PbSO}_4(s)+2 e^{-}$

D

$\mathrm{PbO}_2(\mathrm{~s})+\mathrm{SO}_4^{2-}(\mathrm{aq})+4 \mathrm{H}^{+}(\mathrm{aq})+2 \mathrm{e}^{-}\longrightarrow \mathrm{PbSO}_4(s)+2 \mathrm{H}_2 \mathrm{O}(l)$

4
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The following equation is obtained for a first order reaction at 300 K

$$ \log _{10} \frac{k}{A}=0.00174 $$

What is the activation energy (in $\mathrm{J} \mathrm{mol}^{-1}$ ) of the reaction?

$$ \left(R=8314 \mathrm{~J} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right) $$

A

10.0

B

100.0

C

0.1

D

1.0