NEET 2023 Manipur | Chemical Bonding and Molecular Structure Question 3 | Chemistry

NEET 2023 Manipur

MCQ (Single Correct Answer)

-1

Which one of the following statements is incorrect related to Molecular Orbital Theory?

The $$\pi^*$$ antibonding molecular orbital has a node between the nuclei.

In the formation of bonding molecular orbital, the two electron waves of the bonding atoms reinforce each other.

Molecular orbitals obtained from $$2 \mathrm{P}_{\mathrm{x}}$$ and $$2 \mathrm{P}_{\mathrm{y}}$$ orbitals are symmetrical around the bond axis.

A $$\pi$$-bonding molecular orbital has larger electron density above and below the internuclear axis.

NEET 2023 Manipur

MCQ (Single Correct Answer)

-1

Given below are two statements:

Statement I : Hydrated chlorides and bromides of $$\mathrm{Ca}, \mathrm{Sr}$$ and $$\mathrm{Ba}$$ on heating undergo hydrolysis.

Statement II : Hydrated chlorides and bromides of $$\mathrm{Be}$$ and $$\mathrm{Mg}$$ on heating undergo dehydration.

In the light of the above statements, choose the correct answer from the options given below :

Statement-I is correct but Statement-II is false.

Statement-I is incorrect but Statement-II is true.

Both Statement-I and Statement-II are true.

Both Statement-I and Statement-II are false.

NEET 2023

MCQ (Single Correct Answer)

-1

Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is

$$\mathrm{NH}_{3}, \mathrm{AlCl}_{3}, \mathrm{BeCl}_{2}, \mathrm{CCl}_{4}, \mathrm{PCl}_{5}$$ :

NEET 2023

MCQ (Single Correct Answer)

-1

The correct order of energies of molecular orbitals of $$\mathrm{N}_{2}$$ molecule, is

$$\sigma 1 \mathrm{~s} < \sigma^{*} 1 \mathrm{~s} < \sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \sigma 2 \mathrm{p}_{\mathrm{z}} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$$

$$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \sigma 2 \mathrm{p}_{\mathrm{z}} < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right)$$

$$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma 2 \mathrm{p}_{\mathrm{z}} < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$$

$$\sigma 1 \mathrm{~s} <\sigma^{*} 1 \mathrm{~s} <\sigma 2 \mathrm{~s} < \sigma^{*} 2 \mathrm{~s} < \left(\pi 2 \mathrm{p}_{\mathrm{x}}=\pi 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma 2 \mathrm{p}_{\mathrm{z}} < \left(\pi^{*} 2 \mathrm{p}_{\mathrm{x}}=\pi^{*} 2 \mathrm{p}_{\mathrm{y}}\right) < \sigma^{*} 2 \mathrm{p}_{\mathrm{z}}$$

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