1
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-1

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

A
The $$\pi^*$$ antibonding molecular orbital has a node between the nuclei.
B
In the formation of bonding molecular orbital, the two electron waves of the bonding atoms reinforce each other.
C
Molecular orbitals obtained from $$2 \mathrm{P}_{\mathrm{x}}$$ and $$2 \mathrm{P}_{\mathrm{y}}$$ orbitals are symmetrical around the bond axis.
D
A $$\pi$$-bonding molecular orbital has larger electron density above and below the internuclear axis.
2
NEET 2023 Manipur
MCQ (Single Correct Answer)
+4
-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 :

A
Statement-I is correct but Statement-II is false.
B
Statement-I is incorrect but Statement-II is true.
C
Both Statement-I and Statement-II are true.
D
Both Statement-I and Statement-II are false.
3
NEET 2023
MCQ (Single Correct Answer)
+4
-1

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

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

A
2
B
4
C
1
D
3
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1

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

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