NEET UG 2022 — Chemistry Physical Chemistry

2022mcqmedium

Identify the incorrect statement from the following.

Official previous-year question

Held on 30 Apr 2022 · Verified 9 Jul 2026.

Options

A
All the five $4d$ orbitals have shapes similar to the respective $3d$ orbitals.
B
In an atom, all the five $3d$ orbitals are equal in energy in free state.
C
The shapes of ${d}_{\mathrm{xy},}{d}_{\mathrm{yz}}$ , and ${d}_{\mathrm{zx}}$ orbitals are similar to each other; and ${d}_{{x}^{2}-{y}^{2}}$ and ${d}_{{z}^{2}}$ are similar to each other.
D
All the five $5d$ orbitals are different in size when compared to the respective 4d orbitals.

Did you get this right?

Solution

The shapes of 3d orbital are same as respective 4d and 5d orbitals, only the size of the orbital changes, when the respective shell number increases. All the d-orbitals are degenerate(equal energy) orbitals in the free state.

The shapes of the ${d}_{\mathrm{xy}},{d}_{\mathrm{yz}}\mathrm{and}{d}_{\mathrm{xz}}$ are same.

NEET 2022 Chemistry, Structure of Atom — solution figure 1

The shapes of the ${d}_{{x}^{2}-{y}^{2}}\mathrm{and}{d}_{{z}^{2}}$ are different.

NEET 2022 Chemistry, Structure of Atom — solution figure 2

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Phosphoric acid ionizes in three steps with their ionization constant values $\mathrm{K}_{\mathrm{a}_1}, \mathrm{~K}_{\mathrm{a}_2}$ and $\mathrm{K}_{\mathrm{a}_3}$, respectively, While K is the overall ionization constant. Which of the following statements are true? A. $\log \mathrm{K}=\log \mathrm{K}_{\mathrm{a}_1}+\log \mathrm{K}_{\mathrm{a}_2}+\log \mathrm{K}_{\mathrm{a}_3}$ B. $\mathrm{H}_3 \mathrm{PO}_4$ is a stronger acid than $\mathrm{H}_2 \mathrm{PO}_4^{-}$and $\mathrm{HPO}_4^{2-}$ C. $K_{a_1}\gt K_{a_2}\gt K_{a_3}$ D. $\mathrm{K}_{\mathrm{a}_1}=\frac{\mathrm{K}_{\mathrm{a}_3}+\mathrm{K}_{\mathrm{a}_2}}{2}$ Choose the correct answer from the options given below:

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NEET UG 2022 — Chemistry Physical Chemistry

2022mcqmedium

Identify the incorrect statement from the following.

Official previous-year question

Held on 30 Apr 2022 · Verified 9 Jul 2026.

Options

A
All the five $4d$ orbitals have shapes similar to the respective $3d$ orbitals.
B
In an atom, all the five $3d$ orbitals are equal in energy in free state.
C
The shapes of ${d}_{\mathrm{xy},}{d}_{\mathrm{yz}}$ , and ${d}_{\mathrm{zx}}$ orbitals are similar to each other; and ${d}_{{x}^{2}-{y}^{2}}$ and ${d}_{{z}^{2}}$ are similar to each other.
D
All the five $5d$ orbitals are different in size when compared to the respective 4d orbitals.

Did you get this right?

Solution

The shapes of the ${d}_{\mathrm{xy}},{d}_{\mathrm{yz}}\mathrm{and}{d}_{\mathrm{xz}}$ are same.

NEET 2022 Chemistry, Structure of Atom — solution figure 1

The shapes of the ${d}_{{x}^{2}-{y}^{2}}\mathrm{and}{d}_{{z}^{2}}$ are different.

NEET 2022 Chemistry, Structure of Atom — solution figure 2

Your note

NEET UG Physical Chemistry in other years

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Work through every NEET UG Physical Chemistry PYQ, year by year.

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NEET UG 2022 — Chemistry Physical Chemistry

Options

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Solution

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NEET UG Physical Chemistry in other years

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NEET UG 2022 — Chemistry Physical Chemistry

Options

Did you get this right?

Solution

Your note

NEET UG Physical Chemistry in other years

More NEET UG Physical Chemistry questions

Other Chemistry topics for NEET UG

Organic Chemistry

Inorganic Chemistry

Keep practicing Physical Chemistry