Match Column-I (Reaction) with Column-II (Product formed) and mark the appropriate choice:
| Column-I (Reaction) |
Column-II (Product formed) |
||
| (a) | Gabriel synthesis | (i) | Benzaldehyde |
| (b) | Kolbe synthesis | (ii) | Ethers |
| (c) | Williamson synthesis | (iii) | Primary amines |
| (d) | Etard reaction | (iv) | Salicylic acid |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (ii) | (iv) |
| 2. | (ii) | (iii) | (i) | (iv) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (iii) | (iv) | (ii) | (i) |
Subtopic: Amines - Preparation & Properties |
83%
Level 1: 80%+
NEET - 2022
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The only substance listed below that contains ionic, \(\sigma\) and \(\pi\) bonds is:
1. \(Na_3N\)
2. \(NO_2\)
3. \(NaNO_3\)
4. \(NH_3\)
1. \(Na_3N\)
2. \(NO_2\)
3. \(NaNO_3\)
4. \(NH_3\)
Subtopic: Types of Chemical Bond | Ionic Bond |
69%
Level 2: 60%+
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Which of the following reactions is a decomposition redox reaction?
| 1. | \(\mathrm{2 {Pb}\left({NO}_3\right)_2({s}) \rightarrow 2 {PbO}({s})+4 {NO}_2({g})+{O}_2({g})} \) |
| 2. | \(\mathrm{{N}_2({g})+{O}_2({g}) \rightarrow 2 {NO}({g})} \) |
| 3. | \(\small{\mathrm{{Cl}_2({g})+2 {OH}^{-}({aq}) \rightarrow {ClO}^{-}({aq})+{Cl}^{-}({aq})+4 {H}_2 {O}(\ell)}}\) |
| 4. | \(\small{\mathrm{{P}_4({s})+3 {OH}^{-}({aq})+3 {H}_2 {O}(\ell) \rightarrow{PH}_3({g})+3 {H}_2 {PO}_2^{-}({aq})}}\) |
Subtopic: Redox Titration & Type of Redox |
73%
Level 2: 60%+
NEET - 2022
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The first ionization enthalpies of elements X and Y are 419 kJ mol–1 and 590 kJ mol–1, respectively and the second ionization enthalpies of X and Y are 3069 kJ mol–1 and 1145 kJ mol–1, respectively. The correct statement is:
| 1. | X is an alkali metal and Y is an alkaline earth metal. |
| 2. | X is an alkaline earth metal and Y is an alkali metal. |
| 3. | Both X and Y are alkali metals. |
| 4. | Both X and Y are alkaline earth metals. |
Subtopic: Ionization Energy (IE) |
72%
Level 2: 60%+
NEET - 2022
Hints
Predict the order of reactivity of the following four isomers towards SN2 reaction.
(I) CH3CH2CH2CH2Cl
(II) CH3CH2CH(Cl)CH3
(III) (CH3)2CHCH2Cl
(IV) (CH3)3CCl
(I) CH3CH2CH2CH2Cl
(II) CH3CH2CH(Cl)CH3
(III) (CH3)2CHCH2Cl
(IV) (CH3)3CCl
| 1. | (IV) > (III) > (II) > (I) |
| 2. | (I) > (II) > (III) > (IV) |
| 3. | (I) > (III) > (II) > (IV) |
| 4. | (IV) > (II) > (III) > (I) |
Subtopic: Chemical Properties |
68%
Level 2: 60%+
NEET - 2022
Hints
Match molecules in List-I with the Corresponding shape in List-II:
Choose the correct answer from the options given below:
| List-I (Molecules) |
List-II (Shape) |
||
| (a) | NH3 | (i) | Square pyramidal |
| (b) | ClF3 | (ii) | Trigonal bipyramidal |
| (c) | PCl5 | (iii) | Trigonal pyramidal |
| (d) | BrF5 | (iv) | T-shape |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (iii) | (iv) | (i) | (ii) |
Subtopic: V.S.E.P.R & V.B.T |
82%
Level 1: 80%+
NEET - 2022
Hints
Which of the following pairs consists of transition metal ions that are colourless?
| 1. | \(\mathrm{Sc}^{3+}, \mathrm{Zn}^{2+}\) | 2. | \(\mathrm{Ti}^{4+}, \mathrm{Cu}^{2+}\) |
| 3. | \(\mathrm{V}^{2+}, \mathrm{Ti}^{3+}\) | 4. | \(\mathrm{Zn}^{2+}, \mathrm{Mn}^{2+}\) |
Subtopic: d-Block Elements- Properties & Uses |
78%
Level 2: 60%+
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The correct option for the increasing order of 1st ionization enthalpy:\(Pb, Sn, Ge, Si \) is:
| 1. | \(Pb < Sn < Ge < Si \) |
| 2. | \(Sn < Pb < Si < Ge \) |
| 3. | \(Sn < Pb < Ge < Si\) |
| 4. | \( Pb <Sn < Si < Ge \) |
Subtopic: Carbon Family - Preparations, Properties & Uses |
60%
Level 2: 60%+
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Two half cell reactions are given below:
\(\begin{aligned} &\mathrm{{Co}^{3+}+e^{-} \rightarrow {Co}^{2+}, {E}_{{Co}^{2+} / {Co}^{3+}}^{\circ}=-1.81 {~V}} \\ &2 \mathrm{{Al}^{3+}+6 e^{-} \rightarrow 2 {Al}({s}), {E}_{{Al} / {Al}^{3+}}^{\circ}=+1.66 {~V}} \end{aligned} \)
The standard EMF of a cell with feasible redox reaction will be:
| 1. | +7.09 V | 2. | +0.15 V |
| 3. | +3.47 V | 4. | –3.47 V |
Subtopic: Electrode & Electrode Potential |
69%
Level 2: 60%+
NEET - 2022
Hints
Match the coordination complexes in List-I with their corresponding hybridisation in List-II and mark the correct option:
Codes:
1. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
2. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
3. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
4. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
| List-I (Coordination complexes) | List-II (Hybridisation of central atoms) | ||
| (A) | \(\left[\mathrm{PtCl}_4\right]^{2-}\) | (I) | \(s p^3 d\) |
| (B) | \(\mathrm{BrF}_5\) | (II) | \(d^2sp^3\) |
| (C) | \(\mathrm{PCl}_5\) | (III) | \(dsp^2\) |
| (D) | \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\) | (IV) | \(sp^3d^2\) |
1. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
2. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
3. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
4. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
Subtopic: VBT, CFT & their Limitations |
74%
Level 2: 60%+
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