JEE Mains · Chemistry · STD 11 - 4. Chemical bonding and molecular structure

Given below are two statements:
Statement I: The number of species among \( SF_{4}, NH_{4}^{+}, [NiCl_{4}], XeF_{4}, [PtCl_{4}]^{2-}, SeF_{4} \) and \( [Ni(CN)_{4}]^{2-} \) that have tetrahedral geometry is 3.
Statement II: In the set [\( NO_{2}, BeH_{2}, BF_{3}, AlCl_{3} \)], all the molecules have incomplete octet around central atom.
In the light of the above statements, choose the correct answer from the options given below:

A Statement I is true but Statement II is false
B Both Statement I and Statement II are false
C Statement I is false but Statement II is true
D Both Statement I and Statement II are true

Verified Solution

Answer & Solution

Correct Answer

(C) Statement I is false but Statement II is true

Step-by-step Solution

Detailed explanation

Statement-I: \( SF_{4} \) (See-saw), \( XeF_{4} \) (square planar), \( [PtCl_{4}]^{2-} \) (square planar), \( [NiCl_{4}]^{2-} \) (Tetrahedral), \( [Ni(CN)_{4}]^{2-} \) (square planar), \( SeF_{4} \) (See-saw), \( NH_{4}^{+} \) (Tetrahedral). Statement-II: \( NO_{2} \) (seven…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List \(-I\) with List \(- II\)

List \(- I\) Electronic configuration of elements	List \(- II\) \(\Delta_{ i }\) in \(kJ\, mol-1\)
\((a)\) \(1 s ^{2} 2 s ^{2}\)	\((i)\) \(801\)
\((b)\) \(1 s ^{2} 2 s ^{2} 2 p ^{4}\)	\((ii)\) \(899\)
\((c)\) \(1 s^{2} 2 s^{2} 2 p^{3}\)	\((iii)\) \(1314\)
\((d)\) \(1 s ^{2} 2 s ^{2} 2 p ^{1}\)	\((iv)\) \(1402\)

Choose the most appropriate answer from the options given below

JEE Mains 2021 Easy

The oxidation states of \('P'\) in \(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7}, \mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{5}\) and \(\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{6}\), respectively, are:

JEE Mains 2021 Hard

Match List\(-I\) with List\(-II\)

List\(-I\) Name of oxo acid	List\(-II\) Oxidation state of \(P\)
\((a)\) Hypo phosphorous acid	\((i) +5\)
\((b)\) Orthophosphoric acid	\((ii)+4\)
\((c)\) Hypo phosphoric acid	\((iii) +3\)
\((d)\) Orth phosphorous acid	\((iv)+2\)
	\((v)+1\)

Choose the correct answer from the options given below

JEE Mains 2021 Medium

Explore more questions on app

From JEE Mains

Explore more questions on app