Introduction to Alcohols

Q.

How is ethene prepared from ethanol? Give the reaction involved in it.

Q.

Question 29
Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented.

Under what conditions do these grapes ferment? Is it a chemical or a physical change?

Q.

Explain the manufacture of ethanol from molasses.

Q.

Name the functional groups present in ${\mathrm{CH}}_3\mathrm{CHO}$and ${\mathrm{CH}}_3{\mathrm{COCH}}_3$ ?

Q.

Give four uses of Ethyl alcohol.

Q. Touching the hair of nettle leaves injects _________ that causes burning pain and irritation on skin.

1. methanoic acid
2. nitric acid
3. lactic acid
4. acetic acid

Q.

What are alcohols ? Write names and formulae of first four members of alcohols family.

Q.

Calculate the difference in the formulae and molecular masses for :

(a) $C{H}_{3}OH$ and $C_2{H}_{5}OH$

(b) $C_2{H}_{5}OH$ and $C_3{H}_{7}OH$

(c) $C_3{H}_{7}OH$ and $C_4{H}_{9}OH$

Q.

Write the name and molecular formula of alcohol derived from butane.

Q. Question 37
Intake of a small quantity of methanol can be lethal. Comment.

Q.

Which alcohol is the most acidic?

Q.

What is the name of functional group -OH?

1. Aldehyde

2. Alcohol

3. Ketone

4. Carboxylic acid

Q.

Which of the following is ethanol?

1. CH₃CH₂OH

2. CH₃COOCH₃

3. CH₃COOH

4. CH₃CHO

Q.

What is the molecular formula of alcohol derived from butane.

1. $C{H}_{2}C{H}_{2}C{H}_{2}C{H}_{2}OH$
2. $C{H}_{3}C{H}_{2}C{H}_2-OH$
3. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OH$
4. $C{H}_{3}C{H}_{2}C{H}_{2}CHOH$

Q. $C{H}_3-\stackrel{OH}{\stackrel{|}{C}H}-C{H}_3$ is ____ alcohol.

1. Primary
2. Secondary
3. Tertiary
4. Quaternery

Q.

Give them :
(a) dot diagram of the first member of alcohol,
(b) abbreviated formula of the third member of alcohol,
(c) structure of the second member of the alcohol group.
(d) structure of alcohol with 4 carbon atoms.

Q. Grapes hanging on the plant do not ferment but after being plucked from the plant can be fermented.

Under what conditions do these grapes ferment? Is it a chemical or a physical change?

Q. How many number of isomeric alcohols and ethers possible having the molecular formula $C_4{H}_{10}O$ ?

Q. Classify the following as primary, secondary and tertiary alcohols.

Q. Name a chemical used to dissolve so3

Q. The general formula of alcohols is:

1. $C_N{H}_{N+2}OH$
2. $C_{N/2}{H}_{2N+1}OH$
3. $C_N{H}_{2N}OH$
4. $C_N{H}_{2N+1}OH$

Q. The general formula for alcohol series is $C_n{H}_{2n+1}OH$. What is the formula for alcohol containing four carbon?

1. $C_5{H}_{11}OH$
2. $C_4{H}_{9}OH$
3. $C_4{H}_{8}OH$
4. $C_3{H}_{8}OH$

Q.

The functional group of alcohol is:

1. $-OH$

2. $-COOH$

3. $-Cl$

4. $N{H}_3$

Q. Classify the following as primary, secondary and tertiary alcohol.

Q. A comppound of molecular wight $180$ is acetylated to give a compound of molecular weight $390$. The number of Alcoholic groups in the compound is:

1. $6$
2. $5$
3. $4$
4. $3$

Q. Assertion :Denaturation of ethyl alcohol makes it unfit for drinking purpose. Reason: Denaturation of ethyl alcohol is carried out by pyridine.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Alcoholic group is present in which compound?

1. ${CH}_{3}COOH$
2. ${CH}_3{CH}_{2}OH$
3. $C_6{H}_{5}OH$
4. $H-OH$

Q.

___(Ethanol/ Ethane) is used in anti-bacterial items

Q. Classify the following as primary, secondary and tertiary alcohol.

Q. Write the formula of allyl alcohol and benzyl alcohol.