Which of the following meta-directing substituents is the most deactivating in aromatic substitution?
1.
–SO3H
2.
–COOH
3.
–NO2
4.
–C≡N
Subtopic: Directive Effect of functional grp |
68%
Level 2: 60%+
AIPMT - 2013
Hints
The weight of 70% HNO3 concentrated nitric acid solution that should be used to prepare 250 mL of 2.0 M HNO3 is:
1. 90.0 g conc. HNO3
2. 70.0 g conc. HNO3
3. 54.0 g conc. HNO3
4. 45.0 g conc. HNO3
1. 90.0 g conc. HNO3
2. 70.0 g conc. HNO3
3. 54.0 g conc. HNO3
4. 45.0 g conc. HNO3
Subtopic: Concentration Based Problem |
66%
Level 2: 60%+
AIPMT - 2013
Hints
What is the order of the stability of the following tautomeric compounds?
1. III > II > I
2. II > I > III
3. II > III > I
4. I > II > III
2. II > I > III
3. II > III > I
4. I > II > III
Subtopic: Isomers & Reaction Mechanism |
53%
Level 3: 35%-60%
AIPMT - 2013
Hints
Antiseptics and disinfectants either kill or prevent the growth of microorganisms. Identify which of the following statements is not true:
| 1. | Chlorine and Iodine are used as strong disinfectants. |
| 2. | Dilute solutions of Boric acid and Hydrogen Peroxide are strong antiseptics. |
| 3. | Disinfectants harm the living tissues. |
| 4. | A 0.2% solution of phenol is an antiseptic while 1% solution acts as a disinfectant. |
Subtopic: Classification of Medicines |
60%
Level 2: 60%+
AIPMT - 2013
Hints
Subtopic: Classification - Methods of Polymerization & Copolymerization |
78%
Level 2: 60%+
AIPMT - 2013
Hints
Which of the following compounds produces methyl alcohol on treatment with hot concentrated HI?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Mechanism of Dehydration, Methanol & Ethanol |
83%
Level 1: 80%+
AIPMT - 2013
Hints
Which of the following is not a monomer for a high molecular mass silicone polymer?
| 1. | Me2SiCl2 | 2. | Me3SiCl |
| 3. | PhSiCl3 | 4. | MeSiCl3 |
Subtopic: Properties of Structure of SiO2 & Other Compounds |
56%
Level 3: 35%-60%
AIPMT - 2013
Hints
Identify the correct order of solubility in aqueous medium:
1. ZnS > Na2S > CuS
2. Na2S > CuS > ZnS
3. Na2S > ZnS > Cus
4. Cus > ZnS > Na2S
2. Na2S > CuS > ZnS
3. Na2S > ZnS > Cus
4. Cus > ZnS > Na2S
Subtopic: d-Block Elements- Properties & Uses |
Level 3: 35%-60%
AIPMT - 2013
Hints
What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20oC to 35oC? (R = 8.314 J mol–1 K–1)
| 1. | 269 kJ mol–1 | 2. | 34.7 kJ mol–1 |
| 3. | 15.1 kJ mol–1 | 4. | 342 kJ mol–1 |
Subtopic: Arrhenius Equation |
68%
Level 2: 60%+
AIPMT - 2013
Hints
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of the electrode would be:
| 1. | 0.59 V | 2. | 0.118 V |
| 3. | 1.18 V | 4. | 0.059 V |
Subtopic: Relation between Emf, G, Kc & pH |
78%
Level 2: 60%+
AIPMT - 2013
Hints
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