Dehydration of Alcohols

Q. Why is ethanol soluble in water?

Q.

What is the name of the compound ${\mathrm{C}}_2{\mathrm{H}}_3\mathrm{OH}$?

Q.

Formation of 2-butene as major product by dehydration of 2-butanol is according to

1. Markownikoff rule

2. Anti-Markownikoff rule

3. Saytzeff rule

4. Peroxide effect

Q. How will you carry out the following conversions?
(i) Ethanol to ethene
(ii) Bromoethane to ethanol

Q. Ethylene can be obtained by dehydration of with concentrated $H_2{\mathrm{SO}}_4$ at $160-170°C$.

1. $C_2{H}_5\mathrm{OH}$
2. ${\mathrm{CH}}_3\mathrm{OH}$
3. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}$

Q. Which of the following agents can be used for dehydration of alcohols to yield alkenes?

1. $\mathrm{Conc}.H_2{\mathrm{SO}}_4$
2. $\mathrm{Conc}.H_3{\mathrm{PO}}_4$
3. $\mathrm{Hydrated}{\mathrm{ZnCl}}_2$
4. $\mathrm{Anhydrous}{\mathrm{ZnCl}}_2$

Q.

Ethanol can be converted into ethene which can be changed into ethane. Choose the correct word or phrase from the brackets to complete the following sentences.

(a) The conversion of ethanol into ethene is an example of (dehydration, dehydrogenation).
(b) Converting ethanol into ethene requires the use of (conc. HCl, conc. $HN{O}_3,conc.H_{2}S{O}_4)$.
(c) The conversion of ethene into ethane is an example of (hydration, hydrogenation).
(d) The catalyst used in the conversion of ethene into ethane is commonly (iron, nickel, cobalt).

Q.

The conversion of ethanol to ethene is an example of __________

(dehydration, esterification, dehydrogenation).

Q. State how the following conversions can be carried out:
(a) Ethyl chloride to Ethyl alcohol.
(b) Ethyl chloride to Ethene.
(c) Ethene to Ethyl alcohol.
(d) Ethyl alcohol to Ethane.

Q. An organic compound A is a constituent of antifreeze . The compound on heating with oxygen forms another compound B which has molecular formula of C₂H₄O_{6 , identify the compounds. Write chemical reaction involved. Write one use of each compound.}

Q. CH3COOH + HCl gives

Q.

Give a balanced equation for the lab. preparation of ethylene. How is the gas collected?

Q. Which among the following is the correct order of ease of dehydration of alcohols?

1. $1°>2°>3°$
2. $2°>1°>3°$
3. $3°>2°>1°$
4. $2°>3°>1°$

Q.

Ethanol can be converted to ethene and then can be changed to ethane. Choose the correct word or phrase from the bracket to complete the following sentences:

The catalyst used in the conversion of ethene to ethane is commonly________(iron, cobalt, nickel)

Q. The compound formed when conc. $H_{2}S{O}_4$ dehydrates ethanol is .

1. Ethane
2. Ethene
3. Ethyne
4. Ethanaldehyde

Q.

Which of the following produces Benzene as a byproduct?

1. 

2. 

3. 

4. Only a & b

Q. $LiAl{H}_4$ can reduce:

1. Carbonyl compounds into alcohols
2. alkenes into alkanes
3. $-CHO$ group into $-C{H}_3$
4. either into alcohols

Q. Give the necessary conditions and equations of getting ethanol from:
(a) an alkyl halide
(b) an ethene

Q. When ethyl alcohol is heated with conc. $H_{2}S{O}_4$, the product obtained is?

1. $C_2{H}_2$
2. $C_2{H}_6$
3. $C_2{H}_4$
4. $C{H}_{3}COO{C}_2{H}_5$

Q. (i) Why phenol has a higher boiling point than toluene?
(ii) Why alcohols are easily protonated but phenol is not protonated?

Q.

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

1. 3, 3-dimethyl-1-butene

2. 2, 3-dimethyl-2-butene

3. 2, 3-dimethyl-1-butene

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

Q. What happens when a small piece of sodium is dropped into ethanol?

Q. Which of the following organic compounds could not be dried by anhydrous $CaC{l}_2$?

1. Benzene
2. Ethanol
3. Ethyl acetate
4. Chloroform

Q.

Write balanced chemical equations for the preparation of ethanol from ethyl chloride.

Q. What is the difference between valency and oxidation state?

Q. KOH+CO3(PO4)2----------K3PO4+CO(OH)2

Q.

Balance the given equation:

$\mathrm{Zn}+\mathrm{HCl}\to {\mathrm{ZnCl}}_2+{\mathrm{H}}_2$

Q. State whether the following statements are True or False :
Baeyer's reagent is acidified $KMn{O}_4$ solution.

1. True
2. False