Compound among the following that can be used as
the halide component in the Friedel-Crafts reaction :
1. Chlorobenzene
2. Bromobenzene
3. Chloroethene
4. Isopropyl chloride
Consider the reaction,
This reaction will be the fastest in:
1. Ethanol
2. Methanol
3. N, N'-dimethylformamide (DMF)
4. Water
A few reactions are given below:
i. | \(\small{\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Br}+\mathrm{KOH} \rightarrow \mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2+\mathrm{KBr}+\mathrm{H}_2 \mathrm{O}}\) |
ii. | |
iii. |
(i) | (ii) | (iii) | |
1. | Elimination | Substitution | Addition |
2. | Elimination | Substitution | Substitution |
3. | Substitution | Addition | Addition |
4. | Elimination | Elimination | Addition |
When hydrolyzed with aqueous KOH, compounds that undergoes racemization are:
(i) | (ii) | CH3CH2CH2Cl | |
(iii) | (iv) |
1. | (i) and (ii) | 2. | (ii) and (iv) |
3. | (iv) only | 4. | (i) and (iv) |
The end product (C) in the below-mentioned reaction is:
\(H_3C-Br\xrightarrow{\bf KCN }A\xrightarrow{ \bf H_3O^+~~}B\xrightarrow[\bf\text{Ether}]{~~LiAlH_4~~}C\)
The correct order of increasing C-X bond reactivity toward nucleophiles among the following is:
I | II | ||
III | \(\left(\mathrm{CH}_3\right)_3 \mathrm{C}-\mathrm{X}\) | IV | \(\left(\mathrm{CH}_3\right)_2 \mathrm{CH}-\mathrm{X}\) |
1. | I < II < IV < III | 2. | II < III < I < IV |
3. | IV < III < I < II | 4. | III < II < I < IV |
Which of the following reactions cannot form new carbon-carbon bonds?
1. Reimer-Tiemann reaction
2. Cannizaro reaction
3. Wurtz reaction
4. Friedel-Crafts acylation
Which of the options is correct about product (A)?
1. Product is aromatic
2. Product has a high dipole moment
3. Product has less resonance energy
4. Both A and B
Products (A) and (B) in the given below reactions, respectively, are:
(A) | (B) | |
1. | ||
2. | ||
3. | ||
4. | None of the above |
How is m-Bromotoluene prepared?
1. | Bromination of toluene |
2. | Friedel Craft’s reaction of bromobenzene with CH3Cl |
3. | Bromination of nitrobenzene and subsequent replacement of –NO2 group with an ethyl group |
4. | Bromination of Aceto–p–toluidine followed by hydrolysis and deamination |