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

Half life of a first order reaction is 3 hours. Calculate the value of $\frac{[\mathrm{A}]_0}{[\mathrm{~A}]_{\mathrm{t}}}$ after 8 hours.

A

2.17

B

4.34

C

6.34

D

8.12

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

What is the average oxidation number of carbon in carbon suboxide $\mathrm{C}_3 \mathrm{O}_2$ ?

A

0

B

$+\frac{1}{3}$

C

$+\frac{4}{3}$

D

+2

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

Solubility of $\mathrm{Mg}(\mathrm{OH})_2$ is ' S ' $\mathrm{mol} / \mathrm{dm}^3$ its solubility product is equal to

A

$\mathrm{S}^2$

B

$27 \mathrm{~S}^4$

C

$4 \mathrm{~S}^3$

D

$4 \mathrm{~S}^2$

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

What is change in oxidation number of ' Mn ' during the decolourisation of acidified potassium permanganate by moist sulfur dioxide?

A

increases by 2

B

increase by 5

C

decrease by 2

D

decreases by 5