Dehydration of Alcohols

Q.

a solution of KOH hydrolyses $C{H}_{3}CHCl{CH}_2{CH}_3$ and $C{H}_{3}C{H}_{2}C{H}_2{CH}_{2}Cl$ which one of these is easily hydrolysed and why?

Q. Why is bimolecular dehydration not appropriate for the preparation of ethyl methyl ether?

Q. Mendius reaction involves the reduction of:

1. Cyanoalkanes
2. Alkyl isocyanides
3. Oximes
4. Nitroalkanes

Q.

How to convert ethanol into methanol?

Q. When 3, 3-dimethyl-2-butanol is heated with $H_{2}S{O}_4$ the major product obtained is

1. cis and trans isomers of 2, 3-dimethyl-2-butene
2. 3, 3-dimethyl-1-butene
3. 2, 3-dimethyl-2-butene
4. 2, 3-dimethyl-1-butene

Q. Total number of alkenes possible by dehydrohalogenation of $\text{3-bromo-3-cyclopentylhexane}$ using alcoholic $KOH$ is:

Q.

Write the mechanism of acid catalysed dehydration of ethanol to yield ethene.

Q. The product of acid catalysed hydration of 2-phenyl propene is:

1. 2-phenyl-2-propanol
2. 3-phenyl-2-propanol
3. 1-phenyl-2-propanol
4. 2-phenyl-1-propanol

Q.

Write short notes on glycosides.

Q.

The decreasing order of reactivity of the following organic molecules towards the ${\mathrm{AgNO}}_3$ solution is

1. $\left(\mathrm{B}\right)>\left(\mathrm{A}\right)>\left(\mathrm{C}\right)>\left(\mathrm{D}\right)$

2. $\left(\mathrm{A}\right)>\left(\mathrm{B}\right)>\left(\mathrm{C}\right)>\left(\mathrm{D}\right)$

3. $\left(\mathrm{A}\right)>\left(\mathrm{B}\right)>\left(\mathrm{D}\right)>\left(\mathrm{C}\right)$

4. $\left(\mathrm{C}\right)>\left(\mathrm{D}\right)>\left(\mathrm{A}\right)>\left(\mathrm{B}\right)$

Q. An organic compound is estimated through Dumas method and was found to evolved 6 moles of $C{O}_2$, 4 moles of $H_{2}O$ and 1 mole of nitrogen gas. The formula of the compound is

1. $C_6{H}_{8}N$
2. $C_{12}{H}_{8}N$
3. $C_{12}{H}_8{N}_2$
4. $C_6{H}_8{N}_2$

Q. 19. 2-Bromo-2-methylpropane on reaction with sodium methoxide gives mainly Options: 2-methyl-2-methoxypropane 2-methylpropan-2-ol 2-methyipropanol 2-methylpropene

Q. The compound that does NOT liberate $C{O}_2$, on treatment with aqueous sodium bicarbonate solution,

1. Carbolic acid (Phenol)
2. Salicylic acid
3. Benzenesulphonic acid
4. Benzoic acid

Q.

Arrange the following alcohols in order of increasing ease of dehydration
$C{H}_{3}C{H}_{2}OH$ $C_6{H}_{5}C{H}_{2}OH$
I II

$C{l}_{3}CC{H}_{2}OH$ $F_{3}CC{H}_{2}OH$
​ III IV

1. II < I < III < IV

2. IV < III < I < II

3. IV < III < II < I

4. II < I < IV < III

Q.

From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.

(i) 3 NO(g) → N₂O (g) Rate = k[NO]²

(ii) H₂O₂ (aq) + 3 I⁻ (aq) + 2 H⁺ → 2 H₂O (l) + Rate = k[H₂O₂][I⁻]

(iii) CH₃CHO(g) → CH₄(g) + CO(g) Rate = k [CH₃CHO]^3/2

(iv) C₂H₅Cl(g) → C₂H₄(g) + HCl(g) Rate = k [C₂H₅Cl]

Q. How to convert formaldehyde to methanol?

Q.

Write the reaction for the conversion of ethene to dichloroethane.

Q. In what reaction of the following, work is done by the system on the surroundings?
(a) Hg (l) → Hg (g)
(b) 3O₂ (g) → 2O₃ (g)
(c) H₂ (g) + Cl₂ (g) → 2HCl (g)
(d) N₂ (g) + 3H₂ (g) → 2NH₃ (g)

Q. Which of the following alkyl halides will react more quickly in the $E1$ reaction ?

1. 
2. 
3. 
4. 

Q.
In the given reaction, the total number of alkenes formed (including stereoisomers) is:

Q.

The following alcohol is treated with conc. $H_{2}S{O}_4$, the major product obtained is ?

1. 
   

2. 
   

3. 
   

4. All the three will be formed in equal amounts

Q. What is the correct product of the following reaction?

1. 
2. 
3. 
4. 

Q. 30 when nitrobenzene react with Na3AsO3 +NaOH 6[H] in presence of Glucose NaOH the product? when nitrobenzene react with Zn/NaOH 10[H] product?

Q.

Write the structure of neo-hexyl chloride.

Q.

Write the chemical formula and name of the compound which is the active ingredient of all alcoholic drinks. List its two uses. Write chemical equation and name of the product formed when this compound reacts with-
(i) Sodium metal
(ii) Hot concentrated sulfuric acid

Q.

Assertion: Phenols are more acidic than aliphatic alcohols.

Reason: Phenoxides are stabilized by resonance.

1. Both Assertion and Reason are false.

2. Assertion is true, but Reason is false.

3. Both Assertion and Reason are true. The reason is the correct explanation of Assertion.

4. Both Assertion and Reason are true. The reason is not the correct explanation of Assertion.

Q.

What happens in the transition state?

Q. Place the following in the correct order of acidity.

1. $I>II>III$
2. $III>II>I$
3. $II>I>III$
4. $I>III>II$

Q. In the given reaction,

The number of alkenes formed will be:

1. one
2. two
3. three
4. four

Q.

Ethyl alcohol on oxidation with acidified potassium permanganate results in_______.