Select the incorrect reaction among the following:
| 1. | \(\mathrm{CH}_3 \mathrm{COCl} \xrightarrow[\Delta]{\mathrm{H}_2 \mathrm{O}} \mathrm{CH}_3 \mathrm{COOH}\) |
| 2. |  |
| 3. | \(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{\oplus}]{\text { (i) } \mathrm{KMnO}_{4}/\mathrm{OH^{-} }} \mathrm{CH}_3 \mathrm{COOH}\) |
| 4. | \(\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH} \xrightarrow{\mathrm{CrO}_3-\mathrm{H}_2 \mathrm{SO}_4} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}\) |
Subtopic: Acid Derivatives - Preparation, Properties & Uses |
65%
Level 2: 60%+
NEET - 2024
Hints
The UV-visible absorption bands in the spectra of lanthanoid ions are 'X', probably because of the excitation of electrons involving 'Y'. The 'X' and 'Y', respectively, are:
1. Broad and f orbitals
2. Narrow and f orbitals
3. Broad and d and f orbitals
4. Narrow and d and f orbitals
1. Broad and f orbitals
2. Narrow and f orbitals
3. Broad and d and f orbitals
4. Narrow and d and f orbitals
Subtopic: f-Block Elements- Properties & Uses |
54%
Level 3: 35%-60%
NEET - 2024
Hints
Ethylene diaminetetraacetate ion is a/an :
| 1. | Hexadentate ligand | 2. | Ambidentate ligand |
| 3. | Monodentate ligand | 4. | Bidentate ligand |
Subtopic: Ligands |
80%
Level 1: 80%+
NEET - 2024
Hints
How much glucose is needed to prepare 250 mL of a 1/20 M (M/20) glucose solution?
(Molar mass of glucose: 180 g/mol)
1. 2.25 g
2. 4.5 g
3. 0.44 g
4. 1.125 g
(Molar mass of glucose: 180 g/mol)
1. 2.25 g
2. 4.5 g
3. 0.44 g
4. 1.125 g
Subtopic: Concentration Based Problem |
80%
Level 1: 80%+
NEET - 2024
Hints
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
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