1
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is radius of first orbit of He$^+$ ?

A
52.90 pm
B
78.90 pm
C
26.45 pm
D
13.35 pm
2
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify heteroleptic complex from following.

A
$\mathrm{Na}_3\left[\mathrm{Co}\left(\mathrm{NO}_2\right)_6\right]$
B
$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_5(\mathrm{NSC})\right]^{2+}$
C
$\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$
D
$\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$
3
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Calculate rate constant of first order reaction if concentration of reactant decreases by $90 \%$ in 30 minute?

A
$2.16 \times 10^{-2} \mathrm{~min}^{-1}$
B
$3.52 \times 10^{-2} \mathrm{~min}^{-1}$
C
$4.81 \times 10^{-2} \mathrm{~min}^{-1}$
D
$ 7.67 \times 10^{-2} \mathrm{~min}^{-1}$
4
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the correct decreasing order of $\mathrm{pK}_{\mathrm{b}}$ values of compounds from following.

A
$\mathrm{NH}_3>\mathrm{R}-\mathrm{NH}_2>\mathrm{R}_2 \mathrm{NH}$
B
$\mathrm{R}_2 \mathrm{NH}>\mathrm{R}-\mathrm{NH}_2>\mathrm{NH}_3$
C
$\mathrm{R}-\mathrm{NH}_2>\mathrm{R}_2 \mathrm{NH}>\mathrm{NH}_3$
D
$\mathrm{R}_2 \mathrm{NH}>\mathrm{NH}_3>\mathrm{R}-\mathrm{NH}_2$
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