QBManager

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307014 The number of moles of methane required to produce $11 g {CO}_{2 (g)}$ after complete combustion is (Given molar mass of methane in ${gmol}^{- 1} : 16$ )

1 0.35

2 0.5

3 0.25

4 0.75

Explanation:

$\underset{\binom{1 m o l}{o r 16 g}}{C H_{4}} + 2 O_{2} \to \underset{\binom{11 m o l}{o r 44 g}}{C O_{2}} + 2 H_{2} O$
$44 g C O_{2} i s o b t a i n e d b y 1 m o l e C H_{4}$
$11 g C O_{2} i s o b t a i n e d b y \frac{11 \times 1}{44}$
$= 0 . 25 m o l e C H_{4}$
$S o, t h e c o r r e c t o p t i o n i s (3) .$

JEE Main - 2024

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307015 What is the quantity of hydrogen gas liberated when 46g sodium reacts with excess ethanol? (Given atomic mass of Na = 23)

1

2 .4 \times 1 0^{- 3} k g

2

2 .0 \times 1 0^{- 3} k g

3

4 .0 \times 1 0^{- 3} k g

4

2 .4 \times 1 0^{- 2} k g

Explanation:

The reaction of ethanol with water is as follows.
$2 C_{2} H_{5} O H (l) + 2 N a (s) \to$
$2 C_{2} H_{5} \bar{O} N a^{+} + H_{2} (g) ↑$
2 mole of Na (46 g) = 1 mole of $H_{2} = 2 g = 2 \times 1 0^{- 3} k g$

MHTCET - 2017

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307016 Assertion :
A reactant that is entirely consumed when a reaction goes to completion is known as limiting reactant.
Reason :
The amount of limiting reactant limits the amount of product formed.

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.

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307017 The volume of oxygen gas $(O_{2})$ measured at $0^{^{\circ}} C$ and 1 atm is needed to burn completely 1 L of propane gas $(C_{3} H_{8})$ measured under the same conditions?

1 6 L

2 5 L

3 10 L

4 7 L

Explanation:

$C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$
1 mol or 22.4 L $C_{3} H_{8}$ at STP required 5 mole or $5 \times 22 .4 O_{2}$ at STP.

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307014 The number of moles of methane required to produce $11 g {CO}_{2 (g)}$ after complete combustion is (Given molar mass of methane in ${gmol}^{- 1} : 16$ )

1 0.35

2 0.5

3 0.25

4 0.75

Explanation:

$\underset{\binom{1 m o l}{o r 16 g}}{C H_{4}} + 2 O_{2} \to \underset{\binom{11 m o l}{o r 44 g}}{C O_{2}} + 2 H_{2} O$
$44 g C O_{2} i s o b t a i n e d b y 1 m o l e C H_{4}$
$11 g C O_{2} i s o b t a i n e d b y \frac{11 \times 1}{44}$
$= 0 . 25 m o l e C H_{4}$
$S o, t h e c o r r e c t o p t i o n i s (3) .$

JEE Main - 2024

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307015 What is the quantity of hydrogen gas liberated when 46g sodium reacts with excess ethanol? (Given atomic mass of Na = 23)

1

2 .4 \times 1 0^{- 3} k g

2

2 .0 \times 1 0^{- 3} k g

3

4 .0 \times 1 0^{- 3} k g

4

2 .4 \times 1 0^{- 2} k g

Explanation:

The reaction of ethanol with water is as follows.
$2 C_{2} H_{5} O H (l) + 2 N a (s) \to$
$2 C_{2} H_{5} \bar{O} N a^{+} + H_{2} (g) ↑$
2 mole of Na (46 g) = 1 mole of $H_{2} = 2 g = 2 \times 1 0^{- 3} k g$

MHTCET - 2017

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307016 Assertion :
A reactant that is entirely consumed when a reaction goes to completion is known as limiting reactant.
Reason :
The amount of limiting reactant limits the amount of product formed.

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.

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307017 The volume of oxygen gas $(O_{2})$ measured at $0^{^{\circ}} C$ and 1 atm is needed to burn completely 1 L of propane gas $(C_{3} H_{8})$ measured under the same conditions?

1 6 L

2 5 L

3 10 L

4 7 L

Explanation:

$C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$
1 mol or 22.4 L $C_{3} H_{8}$ at STP required 5 mole or $5 \times 22 .4 O_{2}$ at STP.

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307014 The number of moles of methane required to produce $11 g {CO}_{2 (g)}$ after complete combustion is (Given molar mass of methane in ${gmol}^{- 1} : 16$ )

1 0.35

2 0.5

3 0.25

4 0.75

Explanation:

$\underset{\binom{1 m o l}{o r 16 g}}{C H_{4}} + 2 O_{2} \to \underset{\binom{11 m o l}{o r 44 g}}{C O_{2}} + 2 H_{2} O$
$44 g C O_{2} i s o b t a i n e d b y 1 m o l e C H_{4}$
$11 g C O_{2} i s o b t a i n e d b y \frac{11 \times 1}{44}$
$= 0 . 25 m o l e C H_{4}$
$S o, t h e c o r r e c t o p t i o n i s (3) .$

JEE Main - 2024

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307015 What is the quantity of hydrogen gas liberated when 46g sodium reacts with excess ethanol? (Given atomic mass of Na = 23)

1

2 .4 \times 1 0^{- 3} k g

2

2 .0 \times 1 0^{- 3} k g

3

4 .0 \times 1 0^{- 3} k g

4

2 .4 \times 1 0^{- 2} k g

Explanation:

The reaction of ethanol with water is as follows.
$2 C_{2} H_{5} O H (l) + 2 N a (s) \to$
$2 C_{2} H_{5} \bar{O} N a^{+} + H_{2} (g) ↑$
2 mole of Na (46 g) = 1 mole of $H_{2} = 2 g = 2 \times 1 0^{- 3} k g$

MHTCET - 2017

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307016 Assertion :
A reactant that is entirely consumed when a reaction goes to completion is known as limiting reactant.
Reason :
The amount of limiting reactant limits the amount of product formed.

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.

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307017 The volume of oxygen gas $(O_{2})$ measured at $0^{^{\circ}} C$ and 1 atm is needed to burn completely 1 L of propane gas $(C_{3} H_{8})$ measured under the same conditions?

1 6 L

2 5 L

3 10 L

4 7 L

Explanation:

$C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$
1 mol or 22.4 L $C_{3} H_{8}$ at STP required 5 mole or $5 \times 22 .4 O_{2}$ at STP.

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307014 The number of moles of methane required to produce $11 g {CO}_{2 (g)}$ after complete combustion is (Given molar mass of methane in ${gmol}^{- 1} : 16$ )

1 0.35

2 0.5

3 0.25

4 0.75

Explanation:

$\underset{\binom{1 m o l}{o r 16 g}}{C H_{4}} + 2 O_{2} \to \underset{\binom{11 m o l}{o r 44 g}}{C O_{2}} + 2 H_{2} O$
$44 g C O_{2} i s o b t a i n e d b y 1 m o l e C H_{4}$
$11 g C O_{2} i s o b t a i n e d b y \frac{11 \times 1}{44}$
$= 0 . 25 m o l e C H_{4}$
$S o, t h e c o r r e c t o p t i o n i s (3) .$

JEE Main - 2024

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307015 What is the quantity of hydrogen gas liberated when 46g sodium reacts with excess ethanol? (Given atomic mass of Na = 23)

1

2 .4 \times 1 0^{- 3} k g

2

2 .0 \times 1 0^{- 3} k g

3

4 .0 \times 1 0^{- 3} k g

4

2 .4 \times 1 0^{- 2} k g

Explanation:

The reaction of ethanol with water is as follows.
$2 C_{2} H_{5} O H (l) + 2 N a (s) \to$
$2 C_{2} H_{5} \bar{O} N a^{+} + H_{2} (g) ↑$
2 mole of Na (46 g) = 1 mole of $H_{2} = 2 g = 2 \times 1 0^{- 3} k g$

MHTCET - 2017

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307016 Assertion :
A reactant that is entirely consumed when a reaction goes to completion is known as limiting reactant.
Reason :
The amount of limiting reactant limits the amount of product formed.

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.

CHXI01:SOME BASIC CONCEPTS OF CHEMISTRY

307017 The volume of oxygen gas $(O_{2})$ measured at $0^{^{\circ}} C$ and 1 atm is needed to burn completely 1 L of propane gas $(C_{3} H_{8})$ measured under the same conditions?

1 6 L

2 5 L

3 10 L

4 7 L

Explanation:

$C_{3} H_{8} + 5 O_{2} \to 3 C O_{2} + 4 H_{2} O$
1 mol or 22.4 L $C_{3} H_{8}$ at STP required 5 mole or $5 \times 22 .4 O_{2}$ at STP.

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