1
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is rate constant of a first order reaction if 0.08 mole of reactant reduces to 0.02 mole in 23.03 minute?

A
$$0.2303 \mathrm{~min}^{-1}$$
B
$$1.6021 \mathrm{~min}^{-1}$$
C
$$0.4031 \mathrm{~min}^{-1}$$
D
$$0.06021 \mathrm{~min}^{-1}$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which element from following lanthanoids has half-filled $$\mathrm{f}$$- orbital in observed and expected electronic configuration?

A
Eu
B
Sm
C
Ce
D
Pm
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

How many atoms of niobium are present in $$2.43 \mathrm{~g}$$ if it forms bcc structure with density $$9 \mathrm{~g} \mathrm{~cm}^{-3}$$ and volume of unit cell $$2.7 \times 10^{-23} \mathrm{~cm}^3$$ ?

A
$$3.01 \times 10^{23}$$
B
$$4.1 \times 10^{22}$$
C
$$5.0 \times 10^{22}$$
D
$$2.0 \times 10^{22}$$
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the reagent R used in following conversion.

Glucose $$\mathrm{\buildrel R \over \longrightarrow}$$ n - hexane

A
HI, $$\Delta$$
B
NH$$_2$$OH
C
HCN
D
HNO$$_3$$
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