1
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the energy associated with second orbit of $\mathrm{He}^{+}$.

A

$-2.18 \times 10^{-18} \mathrm{~J}$

B

$-4.36 \times 10^{-18} \mathrm{~J}$

C

$-6.54 \times 10^{-18} \mathrm{~J}$

D

$-8.72 \times 10^{-18} \mathrm{~J}$

2
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Calculate cryoscopic constant of solvent if 2 g solute having molar mass $80 \mathrm{~g} \mathrm{~mol}^{-1}$ dissolved in 75 g solvent decreases its freezing point by 0.4 K .

A

$1.2 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$

B

$1.6 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$

C

$2.1 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$

D

$2.5 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$

3
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the order of reactivity of halogens towards alkanes.

A

$\mathrm{I}_2>\mathrm{Br}_2>\mathrm{Cl}_2>\mathrm{F}_2$

B

$\mathrm{Br}_2>\mathrm{Cl}_2>\mathrm{F}_2>\mathrm{I}_2$

C

$\mathrm{F}_2>\mathrm{Cl}_2>\mathrm{Br}_2>\mathrm{I}_2$

D

$\quad \mathrm{Cl}_2>\mathrm{F}_2>\mathrm{I}_2>\mathrm{Br}_2$

4
MHT CET (PCB) 2025 9th April Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify product ' B ' in the following reaction.

$$ \text { Cumene } \xrightarrow[\Delta]{\mathrm{KMnO}_4, \mathrm{KOH}} \mathrm{~A} \xrightarrow{\mathrm{H}_3 \mathrm{O}^{+}} \mathrm{B} $$

A

Phenol

B

Benzaldehyde

C

Benzophenone

D

Benzoic acid