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

Consider the following gaseous equilibrium reactions (I), (II) and (III) with equilibrium constants $K_1, K_2$ and $K_3$ respectively

(I) $\frac{1}{2} \mathrm{~N}_2+\frac{3}{2} \mathrm{H}_2 \rightleftharpoons \mathrm{NH}_3$

(II) $2 \mathrm{NO} \rightleftharpoons \mathrm{N}_2+\mathrm{O}_2$

(III) $\mathrm{H}_2+\frac{1}{2} \mathrm{O}_2 \rightleftharpoons \mathrm{H}_2 \mathrm{O}$

The correct expression for the equilibrium constant for the gaseous equilibrium reaction

$$ 2 \mathrm{NH}_3+\frac{5}{2} \mathrm{O}_2 \rightleftharpoons 2 \mathrm{NO}+3 \mathrm{H}_2 \mathrm{O} \text { is } $$

A

$\frac{K_3^2}{K_1 \times K_2}$

B

$\frac{K_3^3}{K_1^2 \times K_2}$

C

$\frac{K_3^2}{K_1^2 \times K_2}$

D

$\frac{K_3}{K_1^{\frac{1}{2}} \times K_2^2}$

2
AP EAPCET 2025 - 23rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0
When 30 mL of $0.2 \mathrm{M} \mathrm{NH}_4 \mathrm{OH}$ is added to 30 mL of $2 \mathrm{M} \mathrm{NH}_4 \mathrm{Cl}$ solution. If the pH of the buffer formed is 8.2, what is the $\mathrm{p} K_b$ of $\mathrm{NH}_4 \mathrm{OH}$ ?
A

5.8

B

7.2

C

6.8

D

4.8

3
AP EAPCET 2025 - 23rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Which set of elements form electron precise hydrides?
A

B, Al, Ga

B

$\mathrm{C}, \mathrm{Si}, \mathrm{Ge}$

C

N, P, As

D

B, C, N

4
AP EAPCET 2025 - 23rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The correct order of density of $\mathrm{Be}, \mathrm{Mg}, \mathrm{Ca}, \mathrm{Sr}$ is
A

$\mathrm{Sr}>\mathrm{Be}>\mathrm{Mg}>\mathrm{Ca}$

B

$\mathrm{Sr}>\mathrm{Ca}>\mathrm{Mg}>\mathrm{Be}$

C

$\mathrm{Be}>\mathrm{Mg}>\mathrm{Ca}>\mathrm{Sr}$

D

$\mathrm{Be}>\mathrm{Mg}>\mathrm{Sr}>\mathrm{Ca}$