NEET 2023 Manipur | Chemical Bonding and Molecular Structure Question 2 | Chemistry

NEET 2023 Manipur

MCQ (Single Correct Answer)

-1

Which one of the following represents all isoelectronic species ?

$$\mathrm{Na}^{+}, \mathrm{Cl}^{-}, \mathrm{O}^{-}, \mathrm{NO}^{+}$$

$$\mathrm{N}_2 \mathrm{O}, \mathrm{N}_2 \mathrm{O}_4, \mathrm{NO}^{+}, \mathrm{NO}$$

$$\mathrm{Na}^{+}, \mathrm{Mg}^{2+}, \mathrm{O}^{-}, \mathrm{F}^{-}$$

$$\mathrm{Ca}^{2+}, \mathrm{Ar}, \mathrm{K}^{+}, \mathrm{Cl}^{-}$$

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

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

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