Dehydrohalogenation of Dihalides

Q.

What happens when 1, 2-dibromoethane is boiled with alcoholic potassium hydroxide?

1. Methane is formed

2. Ethene is formed

3. Ethyne is formed

4. Ethane is formed

Q.

What happens when ethylene bromide is boiled with alcoholic potassium hydroxide?

1. ethane is formed

2. methane is formed

3. ethene is formed

4. ethyne is formed

Q.

Identify the product D in the following series of reaction

$C{H}_{3}COOH\stackrel{LiAl{H}_4}{\to }A\underset{443K}{\overset{H^{+}}{\to }}B\stackrel{B{r}_2}{\to }C\underset{KOH}{\overset{alc.}{\to }}D$

1. Methane

2. Alcohol

3. Acetylene

4. Benzaldehyde

Q. which is not a disproportionation reaction? (a)P4+OH^- --->PH3+H2PO2^- (b)Cl2+OH^- --->Cl^-+OCl (c)BR2+OH^- --->Br^- +BrO3^- (d)2KClO3 --->2KCl+3O2

Q.

What is the reagent used in the above reaction?

1. Na

2. HCl and H₂O

3. Zn

4. KOH in C₂ H₅ OH

Q. Give the equation of Sodium ethanoate is heated with soda lime.

Q. The reagent used in the following reaction is .
$R-C{H}_2-CC{l}_2-R⟶R-CH=CCl-R$

1. Na
2. HCl and $H_{2}O$
3. $KOHin{C}_2{H}_{5}OH$
4. Zn

Q.

What is the reagent used in the above reaction?

1. HCl and H₂O

2. KOH in C₂ H₅ OH

3. Na

4. Zn

Q.

What happens when 1, 2-dibromoethane is boiled with alcoholic potassium hydroxide?

1. ethane is formed

2. methane is formed

3. ethene is formed

4. ethyne is formed

Q.

Identify the product D in the following series of reaction

$C{H}_{3}COOH\stackrel{LiAl{H}_4}{\to }A\underset{443K}{\overset{H^{+}}{\to }}B\stackrel{B{r}_2}{\to }C\underset{KOH}{\overset{alc.}{\to }}D$

1. Acetylene

2. Benzaldehyde

3. Methane

4. Alcohol

Q.

What happens when 1, 2-dibromoethane is boiled with alcoholic potassium hydroxide?

1. ethane is formed

2. methane is formed

3. ethene is formed

4. ethyne is formed

Q.

What happens when 1, 2-dibromoethane is boiled with alcoholic potassium hydroxide?

1. Ethane is formed

2. Methane is formed

3. Ethene is formed

4. Ethyne is formed

Q.

1. H₂C = CH-CH=CH₂

2. CH₃-C≡ C-CH₃

3. CH₃-CH=C=CH₂

4. CH₃-CH₂-C≡ CH

Q.

1. CH₃-C≡ C-CH₃

2. CH₃-CH₂-C≡ CH

3. CH₃-CH=C=CH₂

4. H₂C = CH-CH=CH₂