Identify the incorrect statement from the following:
| 1. | The acidic strength of HX (X=F, Cl, Br and I) follows the order: HF > HCI > HBr >HI |
| 2. | Fluorine exhibits - 1 oxidation state whereas other halogens exhibit +1, +3, +5 and +7 oxidation states also. |
| 3. | The enthalpy of dissociation of F2 is smaller than that of Cl2. |
| 4. | Fluorine is stronger oxidising agent than chlorine. |
Subtopic: Group 17 - Preparation, Properties & Uses |
69%
Level 2: 60%+
NEET - 2024
Hints
Consider the given reaction at equilibrium:
\(\mathrm{N_2(g) +3H_2(g) \rightleftharpoons 2NH_3(g), \Delta H=-Q}\)
Reaction is favoured in forward direction by:
\(\mathrm{N_2(g) +3H_2(g) \rightleftharpoons 2NH_3(g), \Delta H=-Q}\)
Reaction is favoured in forward direction by:
| 1. | Use of catalyst |
| 2. | Decreasing concentration of \(\mathrm{N_2}\) |
| 3. | Low pressure, high temperature and high concentration of ammonia |
| 4. | High pressure, low temperature and higher concentration of \(\mathrm{H_2}\) |
Subtopic: Le Chatelier's principle |
82%
Level 1: 80%+
NEET - 2024
Hints
The major product D formed in the following reaction sequence is:
| 1. |  |
2. |  |
| 3. | \(\mathrm{CH_3CH_2OH}\) | 4. | \(\mathrm{CH_3CH_2Cl}\) |
Subtopic: Chemical Properties |
65%
Level 2: 60%+
NEET - 2024
Hints
Match List-I with List-II
Choose the correct answer from the options given below:
1. A-I, B-II, C-IV, D-III
2. A-I, B-IV, C-III, D-II
3. A-I, B-IV, C-II, D-III
4. A-IV, B-I, C-II, D-III
| List-I (Block/group in periodic table) |
List-II (Element) |
||
| A. | Lanthanoid | I. | Ce |
| B. | d-Block element | II. | As |
| C. | p-Block element | III. | Cs |
| D. | s-Block element | IV. | Mn |
1. A-I, B-II, C-IV, D-III
2. A-I, B-IV, C-III, D-II
3. A-I, B-IV, C-II, D-III
4. A-IV, B-I, C-II, D-III
Subtopic: Modern Periodic Table & Periodicity |
84%
Level 1: 80%+
NEET - 2024
Hints
Which of the following is not an ambidentate ligand?
| 1. | \(\mathrm{C_2O^{2-}_4}\) | 2. | \(\mathrm{SCN}^-\) |
| 3. | \(\mathrm{NO^{-}_2}\) | 4. | \(\mathrm{CN}^-\) |
Subtopic: Ligands |
82%
Level 1: 80%+
NEET - 2024
Hints
The quantum numbers of four electrons are given below:
A. \(n\)=3; \(l\)=2; \(m_l\)=1; and s=+\(\frac1{2}\)
B. \(n\)=4; \(l\)=1; \(m_l\)=0; and s=+\(\frac1{2}\)
C. \(n\)=4; \(l\)=2; \(m_l\)=-2; and s=-\(\frac1{2}\)
D. \(n\)=3; \(l\)=1; \(m_l\)=-1; and s=+\(\frac1{2}\)
The correct decreasing order of energy of these electrons is:
1. C>A>B>D
2. C>B>A>D
3. C>D>A>B
4. A>C>D>B
A. \(n\)=3; \(l\)=2; \(m_l\)=1; and s=+\(\frac1{2}\)
B. \(n\)=4; \(l\)=1; \(m_l\)=0; and s=+\(\frac1{2}\)
C. \(n\)=4; \(l\)=2; \(m_l\)=-2; and s=-\(\frac1{2}\)
D. \(n\)=3; \(l\)=1; \(m_l\)=-1; and s=+\(\frac1{2}\)
The correct decreasing order of energy of these electrons is:
1. C>A>B>D
2. C>B>A>D
3. C>D>A>B
4. A>C>D>B
Subtopic: Pauli's Exclusion Principle & Hund's Rule | AUFBAU Principle |
78%
Level 2: 60%+
NEET - 2024
Hints
The major product C in the below-mentioned reaction is:
| 1. | Propan-1-ol | 2. | Propan-2-ol |
| 3. | Propane | 4. | Propyne |
Subtopic: Mechanism of Reactions |
81%
Level 1: 80%+
NEET - 2024
Hints
The compound that does not undergo Friedel-Crafts alkylation reaction but gives a positive carbylamine test is:
| 1. | Aniline | 2. | Pyridine |
| 3. | N-Methylaniline | 4. | Triethylamine |
Subtopic: Mechanism |
84%
Level 1: 80%+
NEET - 2024
Hints
For an endothermic reaction:
A. \(q_p \) (heat at constant pressure) is negative.
B. \(\Delta _r H \) (enthalpy change of the reaction) is positive.
C. \(\Delta _r H \) is negative.
D. \(q_p \) is positive.
Which of the following combinations is correct?
A. \(q_p \) (heat at constant pressure) is negative.
B. \(\Delta _r H \) (enthalpy change of the reaction) is positive.
C. \(\Delta _r H \) is negative.
D. \(q_p \) is positive.
Which of the following combinations is correct?
| 1. | B and D | 2. | C and D |
| 3. | A and B | 4. | A and C |
Subtopic: Thermodynamics' Properties and process |
73%
Level 2: 60%+
NEET - 2024
Hints
1.0 g of \(H_2\) has same number of molecules as in:
| 1. | 14 g of \(N_2\) | 2. | 18 g of \(H_2O\) |
| 3. | 16 g of CO | 4. | 28 g of \(N_2\) |
Subtopic: Moles, Atoms & Electrons |
80%
Level 1: 80%+
NEET - 2024
Hints
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