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1
MHT CET 2023 12th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is the radius of the fourth orbit of hydrogen atom?

A
$$846.4 \mathrm{~pm}$$
B
$$211.6 \mathrm{~pm}$$
C
$$476.1 \mathrm{~pm}$$
D
$$1322.5 \mathrm{~pm}$$
2
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Calculate the frequency of blue light having wavelength $$440 \mathrm{~nm}$$.

A
$$6.82 \times 10^{14} \mathrm{~Hz}$$
B
$$7.5 \times 10^{14} \mathrm{~Hz}$$
C
$$4.0 \times 10^{14} \mathrm{~Hz}$$
D
$$5.26 \times 10^{14} \mathrm{~Hz}$$
3
MHT CET 2023 12th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which of following pairs is an example of isoelectronic species?

A
$$\mathrm{O}^{--} ; \mathrm{Na}^{+}$$
B
$$\mathrm{O}^{--} ; \mathrm{F}$$
C
$$\mathrm{K} ; \mathrm{Ca}^{++}$$
D
$$\mathrm{Ar} ; \mathrm{Al}^{+3}$$
4
MHT CET 2023 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements is NOT true about Bohr atomic model?

A
An electron in hydrogen atom can move around the nucleus in one of the many possible orbits of fixed radius and energy.
B
The energy of an electron in the orbit does not change with time.
C
An electron can move only in those orbits for which angular momentum is integral multiple of $$\frac{\mathrm{h}}{2 \pi}$$.
D
This model can explain the ability of atoms to form molecules by chemical bonds.
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