1
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

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

2
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

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

$$ \text { Match the following } $$

List-I
(Colloidal solution)
List-II
(Use)
(a) Colloidal antimony (I) Eye lotion
(b) Argyrol (II) Intramuscular injection
(c) Colloidal gold (III) Kalaazar
(d) Milk of magnesia (IV) Stomach disorders

The correct answer

A

A-III, B-I, C-II, D-IV

B

A-III, B-I, C-IV, D-II

C

A-IV, B-II, C-I, D-III

D

A-II, B-I, C-IV, D-III

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

Adsorption of a gas on solids follows Freundlich adsorption isotherm. The graph drawn between $\log \frac{x}{m}$ (on $y$-axis) and $\log p$ (on $x$-axis) is a straight line with slope equal to 3 and intercept equal to 0.30 . What is the value of $\frac{x}{m}$ at a pressure of 2 atm ?

(Given: $\log 2=0.3$ )

A

48

B

32

C

16

D

8