The compound that will undergo \(S_N~^1\) reaction with the fastest rate is: 
1. 2.
3. 4.

Subtopic:  Mechanism of Reactions |
 72%
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The most stable carbocation among the following is:
1. 2.
3. 4.
Subtopic:  Reaction Intermediates ; Preparation & Properties |
 73%
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Given below are two statements :
Statement I : Both \(\left[\text{Co}\left(\text{NH}_3\right)_6\right]^{3+}\) and \(\left[\text{CoF}_6\right]^{3-}\) Complexes are octahedral but differ in their magnetic behaviour.
Statement II : \(\left[\text{Co}\left(\text{NH}_3\right)_6\right]^{3+}\) is diamagnetic whereas \(\left[\text{CoF}_6\right]^{3-}\) is paramagnetic.
In the light of the above statements, choose the correct answer from the options given below:
1. Both Statement I and Statement II are False.
2. Statement I is True and Statement II is False.
3. Statement I is False but Statement II is True.
4. Both Statement I and Statement II are True.
Subtopic:  VBT, CFT & their Limitations |
 73%
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NEET - 2024
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1 gram of sodium hydroxide was treated with 25 mL of 0.75 M HCl solution, the mass of sodium hydroxide left unreacted is equal to :

1. 250 mg
2. Zero mg
3. 200 mg
4. 750 mg
Subtopic:  Millimole/Equivalent Concept |
 54%
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Given below are two statements :
Statement I: The boiling point of hydrides of Group 16 elements follow the order 
\(\text{H}_2 \text{O}>\text{H}_2 \text{Te}>\text{H}_2 \text{Se}>\text{H}_2 \text{S} .\)
Statement II: On the basis of molecular mass, H2O is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in H2O, it has higher boiling point. 
In the light of the above statements, choose the correct answer from the options given below:
1. Both Statement I and Statement II are false.
2. Statement I is true and Statement II is false
3. Statement I is false but Statement II is true.
4. Both Statement I and Statement II are true.
Subtopic:  Group 16 - Preparation, Properties & Uses |
 73%
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Arrange the elements Li, Be, B, C, and N in increasing order of their first ionization enthalpies:
1. Li < B < Be < C < N 2. Li < Be < C < B < N
3. Li < Be < N < B < C 4. Li < Be < B < C < N
Subtopic:  Ionization Energy (IE) |
 75%
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Activation energy of any chemical reaction can be calculated if one knows the value of: 
1. Probability of collision.
2. Orientation of reactant molecules during collision.
3. Rate constant at two different temperatures.
4. Rate constant at standard temperature.
Subtopic:  Arrhenius Equation |
 70%
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NEET - 2024
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Arrange the following elements in increasing order of electronegativity N, O, F, C, Si.
Choose the correct answer from the options given below:
1. Si < C < O < N < F 2. O < F < N < C < Si
3. F < O < N < C < Si 4. Si < C < N < O < F
Subtopic:  Electronegativity |
 78%
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Match List I with List II.
List I
Quantum Number
List II
Information provided
A. ml                                     I.         Shape of the orbital
B. ms II. Size of the orbital
C. l III. Orientation of the orbital
D. n IV. Orientation of spin of the electron
Choose the correct answer from the options given below:
1. A-III, B-IV, C-I, D-II 2. A-III, B-IV, C-II, D-I
3. A-II, B-I, C-IV, D-III 4. A-I, B-III, C-II, D-IV
Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 74%
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Match List I with List II.
List I
(Compound)
List II
(Shape/geometry)
A. NH3 I. Trigonal Pyramidal
B. BrF5 II. Square planar
C. XeF4 III. Octahedral
D. SF6 IV. Square Pyramidal
Choose the correct answer from the option given below:

1. A-II, B-IV, C-III, D-I
2. A-III, B-IV, C-I, D-II
3. A-II, B-III, C-IV, D-I
4. A-I, B-IV, C-II, D-III
Subtopic:  V.S.E.P.R & V.B.T |
 82%
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