Match the items given in List-I with those in List-II and select the correct option given below:
Options:
| List-I (Test/reagent) |
List-II (Radical identified) |
||
| A | Lake Test | I | \( \mathrm{NO}_3^{-} \) |
| B | Nessler's Reagent | II | \(\mathrm{Fe}^{3+} \) |
| C | Potassium sulpho cyanide | III | \( \mathrm{Al}^{3+}\) |
| D | Brown Ring Test | IV | \(\mathrm{NH}_4^{+}\) |
Options:
| 1. | A-IV, B-II, C-III, D-I | 2. | A-II, B-IV, C-III, D-I |
| 3. | A-II, B-III, C-IV, D-I | 4. | A-III, B-IV, C-II, D-I |
Subtopic: Detection of Cations |
57%
Level 3: 35%-60%
NEET - 2024
Hints
Match Column I (Molecule) with Column II (Bond enthalpy) and mark the correct option:
| Column-I (Molecule) |
Column-II (Bond enthalpy) \(\left(k J \mathrm{~mol}^{-1}\right)\) |
||
| A. | HCl | I. | 435.8 |
| B. | \(\mathrm{N_2}\) | II. | 498 |
| C. | \(\mathrm{H_2}\) | III. | 946.0 |
| D. | \(\mathrm{O_2}\) | IV. | 431.0 |
| 1. | A-III, B-IV, C-I, D-II | 2. | A-IV, B-I, C-III, D-II |
| 3. | A-IV, B-III, C-II, D-I | 4. | A-IV, B-III, C-I, D-II |
Subtopic: Types of Chemical Bond |
66%
Level 2: 60%+
NEET - 2024
Hints
The standard cell potential of the following cell \(\mathrm{{Zn}\left|{Zn}^{2+}({aq}) \| {Fe}^{2+}({aq})\right| {Fe}~\text{ is }~0.32 {~V}}.\) Calculate the standard Gibbs energy change for the reaction:
\(\mathrm{{Zn}({s})+{Fe}^{2+}({aq}) \rightarrow {Zn}^{2+}({aq})+{Fe}({s})}\)
(Given : \(1 \mathrm{~F}=96487 \mathrm{C} mol^{-1}\))
\(\mathrm{{Zn}({s})+{Fe}^{2+}({aq}) \rightarrow {Zn}^{2+}({aq})+{Fe}({s})}\)
(Given : \(1 \mathrm{~F}=96487 \mathrm{C} mol^{-1}\))
| 1. | \(-61.75 \mathrm{{~kJ} {~mol}}^{-1}\) | 2. | \(+5.006 \mathrm{{~kJ} {~mol}}^{-1}\) |
| 3. | \(-5.006 \mathrm{{~kJ} {~mol}}^{-1}\) | 4. | \(+61.75 \mathrm{{~kJ} {~mol}}^{-1}\) |
Subtopic: Relation between Emf, G, Kc & pH |
85%
Level 1: 80%+
NEET - 2024
Hints
On complete combustion, \(0.3 \mathrm{~g}\) of an organic compound gave \(0.2 \mathrm{~g}\) of \(\mathrm{CO}_2~ \mathrm{and}~ 0.1 \mathrm{~g}\) of \(\mathrm{H}_2 \mathrm{O}\). The percentage composition of carbon and hydrogen in the compound, respectively is:
1. \(4.07 \% ~\mathrm{and}~ 15.02 \%\)
2. \(18.18 \% ~\mathrm{and}~ 3.70 \%\)
3. \(15.02 \% ~\mathrm{and}~ 4.07 \%\)
4. \(3.70 \% ~\mathrm{and}~ 18.18 \%\)
1. \(4.07 \% ~\mathrm{and}~ 15.02 \%\)
2. \(18.18 \% ~\mathrm{and}~ 3.70 \%\)
3. \(15.02 \% ~\mathrm{and}~ 4.07 \%\)
4. \(3.70 \% ~\mathrm{and}~ 18.18 \%\)
Subtopic: Quantitative Analysis of Organic Compounds |
74%
Level 2: 60%+
NEET - 2024
Hints
Consider the following reaction:
The reaction method given above is not suitable for the preparation of the corresponding haloarene products due to high reactivity of halogen when X is:
The reaction method given above is not suitable for the preparation of the corresponding haloarene products due to high reactivity of halogen when X is:
| 1. | F | 2. | I |
| 3. | Cl | 4. | Br |
Subtopic: Chemical Properties |
78%
Level 2: 60%+
NEET - 2024
Hints
The alkane that can be oxidized to the corresponding alcohol by \(\mathrm{KMnO}_4\) as per the equation
is, when:
1. \( \mathrm{{R}_1={H} ;~ {R}_2={H} ;~ {R}_3={H}} \)
2. \( \mathrm{{R}_1={CH}_3 ;~ {R}_2={CH}_3 ;~ {R}_3={CH}_3} \)
3. \( \mathrm{{R}_1={CH}_3 ;~ {R}_2={H} ;~ {R}_3={H}}\)
4. \(\mathrm{{R}_1={CH}_3 ;~ {R}_2={CH}_3 ;~ {R}_3={H}}\)
is, when:
1. \( \mathrm{{R}_1={H} ;~ {R}_2={H} ;~ {R}_3={H}} \)
2. \( \mathrm{{R}_1={CH}_3 ;~ {R}_2={CH}_3 ;~ {R}_3={CH}_3} \)
3. \( \mathrm{{R}_1={CH}_3 ;~ {R}_2={H} ;~ {R}_3={H}}\)
4. \(\mathrm{{R}_1={CH}_3 ;~ {R}_2={CH}_3 ;~ {R}_3={H}}\)
Subtopic: Alkanes, Alkenes and Alkynes - Chemical Properties |
76%
Level 2: 60%+
NEET - 2024
Hints
Consider the following reaction:
\(\mathrm{A}_2(\mathrm{~g})+3 \mathrm{~B}_2(\mathrm{~g}) \rightarrow 2 \mathrm{AB}_3(\mathrm{~g})\)
If at 300K, the enthalpy change for the above reaction is +15 kJ, then the internal energy change is:
\(\mathrm{A}_2(\mathrm{~g})+3 \mathrm{~B}_2(\mathrm{~g}) \rightarrow 2 \mathrm{AB}_3(\mathrm{~g})\)
If at 300K, the enthalpy change for the above reaction is +15 kJ, then the internal energy change is:
| 1. | 19.98 K J | 2. | 200 J |
| 3. | 1999 J | 4. | 1.9988 kJ |
Subtopic: Enthalpy & Internal energy |
77%
Level 2: 60%+
NEET - 2024
Hints
Rate constants of a reaction at 500 K and 700 K are 0.04 \(s^{-1}\) and 0.14 \(s^{-1}\) respectively, then the activation energy of the reaction is:
[Given: log 3.5 = 0.5441, R = \(8.31 \text J\text K^{-1} \text{mol}^{-1}\) ]
1. 18231 J
2. 18500 J
3. 18219 J
4. 18030 J
[Given: log 3.5 = 0.5441, R = \(8.31 \text J\text K^{-1} \text{mol}^{-1}\) ]
1. 18231 J
2. 18500 J
3. 18219 J
4. 18030 J
Subtopic: Arrhenius Equation |
Level 3: 35%-60%
NEET - 2024
Hints
What mass of glucose (C₆H₁₂O₆) must be dissolved in 1 liter of solution to make it isotonic with a 15 g/L solution of urea (NH₂CONH₂)?
(Given : Molar mass in g \(\mathrm{mol}^{-1}\) C:12, H:1, O: 16, N:14)1. 55 g
2. 15 g
3. 30 g
4. 45 g
Subtopic: Concentration Terms & Henry's Law | Osmosis & Osmotic Pressure |
78%
Level 2: 60%+
NEET - 2024
Hints
Identify the structural features common to [Mn₂(CO)₁₀] and [Co₂(CO)₈]:
A. Presence of a metal-metal bond
B. Presence of terminal carbonyl groups
C. Presence of bridging carbonyl groups
D. Metals in the zero oxidation state
Choose the correct answer from the options given below:
A. Presence of a metal-metal bond
B. Presence of terminal carbonyl groups
C. Presence of bridging carbonyl groups
D. Metals in the zero oxidation state
Choose the correct answer from the options given below:
| 1. | Only A, B and C | 2. | Only B, C and D |
| 3. | Only A, C and D | 4. | Only A, B and D |
Subtopic: Organometallic Complexes & their Uses |
58%
Level 3: 35%-60%
NEET - 2024
Hints
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