The number of Faradays (F) required to produce 20 g of calcium from molten CaCl2 (Atomic mass of Ca = 40 g mol–1) is:
1. 2
2. 3
3. 4
4. 1
Subtopic: Faraday’s Law of Electrolysis |
71%
Level 2: 60%+
NEET - 2020
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Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
86%
Level 1: 80%+
NEET - 2020
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Subtopic: Aldehydes & Ketones: Preparation & Properties |
71%
Level 2: 60%+
NEET - 2020
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The correct order of bond order in the following species is:
| 1. | \(\mathrm{O}^{2+}_2>\mathrm{O}^+_2>\mathrm{O}^-_2\) | 2. | \(\mathrm{O}^{2+}_2<\mathrm{O}^-_2<\mathrm{O}^+_2\) |
| 3. | \(\mathrm{O}^{+}_2>\mathrm{O}^-_2<\mathrm{O}^{2+}_2\) | 4. | \(\mathrm{O}^{-}_2<\mathrm{O}^+_2>\mathrm{O}^{2+}_2\) |
Subtopic: M.O.T |
83%
Level 1: 80%+
NEET - 2015
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Links
In the following reaction:
\(\text {HC} \equiv \text {CH} \xrightarrow [Hg^{2+}] { H_2SO_4} P \)
Product 'P' will not give
1. Tollen's reagent test
2. Fehling's solution
3. Victor Meyer test
4. Iodoform test
\(\text {HC} \equiv \text {CH} \xrightarrow [Hg^{2+}] { H_2SO_4} P \)
Product 'P' will not give
1. Tollen's reagent test
2. Fehling's solution
3. Victor Meyer test
4. Iodoform test
Subtopic: Aldehydes & Ketones: Preparation & Properties |
64%
Level 2: 60%+
NEET - 2013
Hints
What is the alteration in the oxidation state of carbon in the given reaction?
\(\mathrm{{CH_4}_{(g)} + 4{Cl_2}_{(g)} \rightarrow {CCl_4}_{(l)} + 4 HCl_{(g)}}\)
| 1. | 0 to +4 | 2. | –4 to +4 |
| 3. | 0 to –4 | 4. | +4 to +4 |
Subtopic: Oxidizing & Reducing Agents |
83%
Level 1: 80%+
NEET - 2020
Hints
Which of the following is the time required to reduce the amount of a reactant from 2.0 g to 0.2 g for a first-order reaction with rate constant \(k = 4.606 \times 10^{-3} \, \text{s}^{-1}\)?
| 1. | 200 s | 2. | 500 s |
| 3. | 1000 s | 4. | 100 s |
Subtopic: First Order Reaction Kinetics |
84%
Level 1: 80%+
NEET - 2020
Hints
For the reaction, 2Cl(g) Cl2(g), the correct option is:
| 1. | \(\Delta_{\mathrm{r}} \mathrm{H}>0\) and \(\Delta_{\mathrm{r}} \mathrm{S}<0 \) | 2. | \(\Delta_{\mathrm{r}} \mathrm{H}<0\) and \( \Delta_{\mathrm{r}} \mathrm{S}>0 \) |
| 3. | \(\Delta_{\mathrm{r}} \mathrm{H}<0 \) and \(\Delta_{\mathrm{r}} \mathrm{S}<0 \) | 4. | \(\Delta_{\mathrm{r}} \mathrm{H}>0\) and \( \Delta_{\mathrm{r}} \mathrm{S}>0\) |
Subtopic: Enthalpy & Internal energy | Spontaneity & Entropy |
61%
Level 2: 60%+
NEET - 2020
Hints
Which of the following set of molecules will have zero dipole moment?
| 1. | Boron trifluoride, hydrogen fluoride, carbon dioxide, 1 3-dichlorobenzene |
| 2. | Nitrogen trifluoride, beryllium difluoride, water, 1 3 -dichlorobenzene |
| 3. | Boron trifluoride, beryllium difluoride, carbon dioxide, 1 4-dichlorobenzene |
| 4. | Ammonia, beryllium difluoride, water, 1, 4-dichlorobenzene |
Subtopic: Polarity |
82%
Level 1: 80%+
NEET - 2020
Hints
Which of the following contains the maximum number of atoms ?
| 1. | 1 g of Mg(s) | 2. | 1 g of O2 (g) |
| 3. | 1 g of Li(s) | 4. | 1 g of Ag(s) |
Subtopic: Moles, Atoms & Electrons |
79%
Level 2: 60%+
NEET - 2020
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