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Which of the following is a positively charged sol? 
1. Methylene blue sol 
2. Congo red sol 
3. Siver sol 
4. \(Sb_2S_3 ~sol\)
Subtopic:  Colloidal Solution |
Level 3: 35%-60%
NEET - 2023
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Match List-I with List-II:
List-I
(Mixtures/Sample)		 List-II
(Technique used for purification)
A. Glycerol from spent lye (I) Steam distillation
B. Chloroform + Aniline  (II) Fractional distillation
C. Fractions of crude oil (III) Distillation under reduced pressure
D. Aniline+water (IV) Distillation 
 
Choose the correct answer from the options given below 
Options: (A) (B) (C) (D)
1. III IV II I
2. IV II I III
3. I II III IV
4. I III II IV
Subtopic:  Purification of Organic Compounds |
 78%
Level 2: 60%+
NEET - 2023
Hints
A reaction among the following can generate isonitriles as a major product.

A. \(R-X + HCN \rightarrow \)
B. \(R-X + AgCN \rightarrow \)
C. \(R-X + KCN \rightarrow \)
D. \(R-X + NaCN \xrightarrow [C_2H_5OH] {H_2O} \) 

Choose the most appropriate answer from the options given below: 
1. (D) only  2. (C) and (D) only  
3. (B) only  4. (A) and (B) only 
Subtopic:  Chemical Properties |
 77%
Level 2: 60%+
NEET - 2023
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The List-I with List-II 
List-I
(Hydride)		 List-II
(Type of Hydride)
A. NaH (I) Electron precise
B. PH3 (II) Saline
C. GeH4 (III) Metallic
D. LaH2.87 (IV) Electron rich

Choose the correct answer from the options given below: 
Options: (A) (B) (C) (D)
1. III IV II I
2. II III IV I
3. I III II IV
4. II IV I III
Subtopic:  Type of Hydride |
 52%
Level 3: 35%-60%
NEET - 2023
Hints
Which one of the following statements is incorrect related to Molecular Orbital Theory?
1. The \(\pi^*\) antibonding molecular orbital has a node between the nuclei. 
2. In the formation of a bonding molecular orbital, the two electron waves of the bonding atoms reinforce each other.
3. Molecular orbitals obtained from \(2P_x\) and \(2P_y\) orbitals are symmetrical around the bond axis. 
4. A \(\pi-\)bonding molecular orbital has larger electron density above and below the internuclear axis.
Subtopic:  M.O.T |
 52%
Level 3: 35%-60%
NEET - 2023
Hints
Which combination of the following substances will result in the formation of an acidic buffer when mixed?
1. Weak acid and it's salt with a strong base.
2. Equal volumes of equimolar solutions of weak acid and weak base.
3. Strong acid and its salt with a strong base.
4. Strong acid and its salt with a weak base.
(The pKa of acid = pKb of the base)
Subtopic:  Buffer |
 78%
Level 2: 60%+
NEET - 2023
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Reagents that can be used to convert alcohols to carboxylic acids are:
(A) CrO3 - H2SO4
(B) K2Cr2O7 + H2SO4
(C) KMnO4 + KOH/H3O+
(D) Cu, 573 K
(E) CrO3+ (CH3CO)2O
Choose the most appropriate answer from the options given below:
1. (B), (C) and (D) only
2. (B), (D) and (E) only
3. (A), (B) and (C) only
4. (A), (B) and (E) only
Subtopic:  Alcohols: Preparation & Properties |
 72%
Level 2: 60%+
NEET - 2023
Hints
Select the element (M) whose trihalides cannot be hydrolysed to form [M(H2O)6]3+.
1. Ga 2. In 
3. Al 4. B
Subtopic:  Boron Family- Preparations, Properties & Uses |
 74%
Level 2: 60%+
NEET - 2023
Hints
The correct options for the rate law that corresponds to overall first order reaction is:
1. \( Rate =k[A]^0[B]^2 \) 2. \( Rate =k[A][B] \)
3. \(Rate=k[A]^{1 / 2}[B]^2 \) 4. \(Rate =k[A]^{-1 / 2}[B]^{3 / 2}\)
Subtopic:  Order, Molecularity and Mechanism |
 80%
Level 1: 80%+
NEET - 2023
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The least basic compounds/species among the following is:
1. 2.
3. 4.
Subtopic:  Amines - Preparation & Properties |
Level 3: 35%-60%
NEET - 2023
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