Melting Point of Alkanes

Q. The compound in which mass percentage of carbon is 75%and that of hydrogen is 25%is

Q.

Alkanes with even number of C atoms have higher melting points than those with odd number of C atoms.

1. True
2. False

Q. The decreasing order of boiling points of the following alcohols is?

1. $\text{3-methylbutan-2-ol > 2-methylbutan-2-ol > pentan-1-ol}$
2. $\text{pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol}$
3. $\text{2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol}$
4. $\text{2-methylbutan-2-ol > pentan-1-ol > 3-methylbutan-2-ol}$

Q. Identify the correct order of boiling points of the following compounds.
$\left(1\right)C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OH$
$\left(2\right)C{H}_{3}C{H}_{2}C{H}_{2}CHO$
$\left(3\right)C{H}_{3}C{H}_{2}C{H}_{2}COOH$

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

Q.

Which of the following has least boiling point?

1. 3-Pentanol

2. n-Pentane

3. 2, 2, -Dimethyl Propanol

4. n- Pentanol

Q. The correct order of the boiling point for primary ($1^{\circ }$), secondary ($2^{\circ }$) and tertiary ($3^{\circ }$) alcohols:

1. $1^{\circ }$ > $2^{\circ }$ > $3^{\circ }$
   
2. $3^{\circ }$ > $2^{\circ }$ > $1^{\circ }$
3. $2^{\circ }$ > $1^{\circ }$ > $3^{\circ }$
4. $2^{\circ }$ > $3^{\circ }$ > $1^{\circ }$

Q. Which of the following(s) represent the correct order of boiling points?

1. $C{H}_{3}C{H}_{2}COOH<C{H}_{3}C{H}_{2}C{H}_{2}COOH<C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}COOH$
2. $HCOC{H}_3<C_2{H}_{5}OH<C{H}_{3}COOH$
3. $HCOC{H}_3<C{H}_{3}COOH<C_2{H}_{5}OH$
4. $C_2{H}_{5}OH<C{H}_{3}COOH<C{H}_{3}C{H}_{2}COOH$

Q. The order of boiling point of primary (1), secondary (2) and tertiary (3) alcohols is:

1. 1 > 2 > 3
2. 2 > 3 > 1
3. 3 > 2 > 1
4. 2 > 1 > 3

Q. Boiling point of nitro methane is:

1. 379 K
2. 378 K
3. 370 K
4. 374 K

Q.

Which of the following has least boiling point?

1. 3-Pentanol

2. n-Pentane

3. 2, 2, -Dimethyl Propanol

4. n- Pentanol

Q. Which of the following alcohols has the highest boiling point?

1. Methanol
2. 2-Butanol
3. 1-Butanol
4. 2- Methyl-2-propanol

Q. Which among the following has highest boiling point?

1. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}Cl$
2. $(C{H}_3{)}_{2}CHC{H}_{2}Cl$
3. $(C{H}_3{)}_{3}C-Cl$
4. None of the above

Q.

Alkanes with even number of C atoms have higher melting points than those with odd number of C atoms.

1. True
2. False

Q. Assertion :The boiling point of diethyl ether is greater than furan Reason: Furan is more compact and has less surface area.

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. Which of the following about alcohol is not correct?

1. Alcohol are soluble in water
2. All alcohol are having a hydroxyl group on it
3. None of the above
4. As the length of the hydrocarbon chain increases, the solubility in water decreases.