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

Identify the correct decreasing order of stability of complexes formed by divalent metal ions with same ligand.

A

$\mathrm{Co}^{2+}>\mathrm{Fe}^{2+}>\mathrm{Ni}^{2+}$

B

$\mathrm{Fe}^{2+}>\mathrm{Co}^{2+}>\mathrm{Ni}^{2+}$

C

$\mathrm{Ni}^{2+}>\mathrm{Co}^{2+}>\mathrm{Fe}^{2+}$

D

$\mathrm{Ni}^{2+}>\mathrm{Fe}^{2+}>\mathrm{Co}^{2+}$

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

Which from following tests for glucose confirms presence of carbonyl group?

A

Action of $\mathrm{NH}_2 \mathrm{OH}$ to form oxime

B

Heating with HI forming $n$-hexane

C

Formation of pentaacetate derivative when reacted with acetic anhydride

D

Glucose and gluconic acid both form saccharic acid when treated with dilute $\mathrm{HNO}_3$

3
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

4
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