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CHXI13:HYDROCARBONS

317827 Assertion :
Alkanes are stable to acids, alkalies, oxidising agents, etc. at room temperature.
Reason :
Alkanes are less reactive at room temperature.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

The $C - H$ bond is almost non-polar due to the less electronegativity difference between $C$ and $H$ . The $C - C$ bond is completely non-polar and polar reagents find no reaction sites on alkane molecules. This makes alkanes less reactive. So, option (2) is correct.

CHXI13:HYDROCARBONS

317828 Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

1

C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O(l)

2

C H_{4} (g) + O_{2} (g) \to C(s) + 2 H_{2} O(l)

3

C H_{4} (g)   + O_{2} (g) \overset{M o_{2} O_{3}}{\to} HCHO   + H_{2} O

4

2C H_{4} (g) + O_{2} (g) \overset{Cu/100 atm}{\to} 2C H_{3} OH

NCERT Exemplar

CHXI13:HYDROCARBONS

317829 Nitro ethane can be obtained from ethane by

1 the action of conc.

{HNO}_{3}

at

100^{\circ} C

2 the action of dil

{HNO}_{3}

at

200^{\circ} C

3 the action of conc.

{HNO}_{3}

at

450^{\circ} C

4 the action of conc.

{HNO}_{3}

at

0^{\circ} C

Explanation:

Nitration of alkane is carried out using conc. ${HNO}_{3}$ at $450^{\circ} C$ .
$C_{2} H_{6} + HN O_{3} \overset{400 - 450^{\circ} C}{\to} C_{2} H_{5} N O_{2} + H_{2} O$

CHXI13:HYDROCARBONS

317830 Final products of complete oxidation of hydrocarbon is

1 Acid

2 Dihydric alcohol

3 Aldehyde

4

H_{2} O + {CO}_{2}

CHXI13:HYDROCARBONS

317827 Assertion :
Alkanes are stable to acids, alkalies, oxidising agents, etc. at room temperature.
Reason :
Alkanes are less reactive at room temperature.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

The $C - H$ bond is almost non-polar due to the less electronegativity difference between $C$ and $H$ . The $C - C$ bond is completely non-polar and polar reagents find no reaction sites on alkane molecules. This makes alkanes less reactive. So, option (2) is correct.

CHXI13:HYDROCARBONS

317828 Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

1

C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O(l)

2

C H_{4} (g) + O_{2} (g) \to C(s) + 2 H_{2} O(l)

3

C H_{4} (g)   + O_{2} (g) \overset{M o_{2} O_{3}}{\to} HCHO   + H_{2} O

4

2C H_{4} (g) + O_{2} (g) \overset{Cu/100 atm}{\to} 2C H_{3} OH

NCERT Exemplar

CHXI13:HYDROCARBONS

317829 Nitro ethane can be obtained from ethane by

1 the action of conc.

{HNO}_{3}

at

100^{\circ} C

2 the action of dil

{HNO}_{3}

at

200^{\circ} C

3 the action of conc.

{HNO}_{3}

at

450^{\circ} C

4 the action of conc.

{HNO}_{3}

at

0^{\circ} C

Explanation:

Nitration of alkane is carried out using conc. ${HNO}_{3}$ at $450^{\circ} C$ .
$C_{2} H_{6} + HN O_{3} \overset{400 - 450^{\circ} C}{\to} C_{2} H_{5} N O_{2} + H_{2} O$

CHXI13:HYDROCARBONS

317830 Final products of complete oxidation of hydrocarbon is

1 Acid

2 Dihydric alcohol

3 Aldehyde

4

H_{2} O + {CO}_{2}

CHXI13:HYDROCARBONS

317827 Assertion :
Alkanes are stable to acids, alkalies, oxidising agents, etc. at room temperature.
Reason :
Alkanes are less reactive at room temperature.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

The $C - H$ bond is almost non-polar due to the less electronegativity difference between $C$ and $H$ . The $C - C$ bond is completely non-polar and polar reagents find no reaction sites on alkane molecules. This makes alkanes less reactive. So, option (2) is correct.

CHXI13:HYDROCARBONS

317828 Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

1

C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O(l)

2

C H_{4} (g) + O_{2} (g) \to C(s) + 2 H_{2} O(l)

3

C H_{4} (g)   + O_{2} (g) \overset{M o_{2} O_{3}}{\to} HCHO   + H_{2} O

4

2C H_{4} (g) + O_{2} (g) \overset{Cu/100 atm}{\to} 2C H_{3} OH

NCERT Exemplar

CHXI13:HYDROCARBONS

317829 Nitro ethane can be obtained from ethane by

1 the action of conc.

{HNO}_{3}

at

100^{\circ} C

2 the action of dil

{HNO}_{3}

at

200^{\circ} C

3 the action of conc.

{HNO}_{3}

at

450^{\circ} C

4 the action of conc.

{HNO}_{3}

at

0^{\circ} C

Explanation:

Nitration of alkane is carried out using conc. ${HNO}_{3}$ at $450^{\circ} C$ .
$C_{2} H_{6} + HN O_{3} \overset{400 - 450^{\circ} C}{\to} C_{2} H_{5} N O_{2} + H_{2} O$

CHXI13:HYDROCARBONS

317830 Final products of complete oxidation of hydrocarbon is

1 Acid

2 Dihydric alcohol

3 Aldehyde

4

H_{2} O + {CO}_{2}

CHXI13:HYDROCARBONS

317827 Assertion :
Alkanes are stable to acids, alkalies, oxidising agents, etc. at room temperature.
Reason :
Alkanes are less reactive at room temperature.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

The $C - H$ bond is almost non-polar due to the less electronegativity difference between $C$ and $H$ . The $C - C$ bond is completely non-polar and polar reagents find no reaction sites on alkane molecules. This makes alkanes less reactive. So, option (2) is correct.

CHXI13:HYDROCARBONS

317828 Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

1

C H_{4} (g) + 2 O_{2} (g) \to C O_{2} (g) + 2 H_{2} O(l)

2

C H_{4} (g) + O_{2} (g) \to C(s) + 2 H_{2} O(l)

3

C H_{4} (g)   + O_{2} (g) \overset{M o_{2} O_{3}}{\to} HCHO   + H_{2} O

4

2C H_{4} (g) + O_{2} (g) \overset{Cu/100 atm}{\to} 2C H_{3} OH

NCERT Exemplar

CHXI13:HYDROCARBONS

317829 Nitro ethane can be obtained from ethane by

1 the action of conc.

{HNO}_{3}

at

100^{\circ} C

2 the action of dil

{HNO}_{3}

at

200^{\circ} C

3 the action of conc.

{HNO}_{3}

at

450^{\circ} C

4 the action of conc.

{HNO}_{3}

at

0^{\circ} C

Explanation:

Nitration of alkane is carried out using conc. ${HNO}_{3}$ at $450^{\circ} C$ .
$C_{2} H_{6} + HN O_{3} \overset{400 - 450^{\circ} C}{\to} C_{2} H_{5} N O_{2} + H_{2} O$

CHXI13:HYDROCARBONS

317830 Final products of complete oxidation of hydrocarbon is

1 Acid

2 Dihydric alcohol

3 Aldehyde

4

H_{2} O + {CO}_{2}

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