In each of the following questions, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer.

Assertion (A): If 30 mL of $H_{2}$ and 20 mL of $O_{2}$ react to form water, 5 mL of $H_{2}$ is left at the end of the reaction.
Reason (R): $H_{2}$ is the limiting reagent.

If both (A) and (R) are correct and (R) is the correct explanation for (A).

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If both (A) and (R) are correct and (R) is not the correct explanation for (A).

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If (A) is correct but (R) is incorrect.

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If (A) is incorrect and (R) is correct.

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Solution

The correct option is D
If (A) is incorrect and (R) is correct.

(A) is wrong, but (R) is correct.
$H_{2} 30 m L + \frac{1}{2} O_{2} 15 m L r e a c t e d \to H_{2} O$
Volume of $O_{2}$ left = 20 - 15 = 5 mL
(R) is correct, since $H_{2}$ is completely consumed, and hence is the limiting reagent.

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Similar questions

Q. Assertion :If

30

mL of

H_{2}

and

20

mL of

O_{2}

react to form water, then

5

mL of

H_{2}

is left at the end of the reaction. Reason:

H_{2}

is the limiting reagent.

In each of the following questions, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer.

Assertion (A): If 30 mL of $H_{2}$ and 20 mL of $O_{2}$ react to form water, 5 mL of $H_{2}$ is left at the end of the reaction.
Reason (R): $H_{2}$ is the limiting reagent.

Q. In each of the following question, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer:

Assertion (A): The heat absorbed during the isothermal expansion of an ideal gas against vacuum is zero.
Reason (R): The volume occupied by the molecules of an ideal gas is zero.

Q. If 30 mL of

H_{2}

and 20 mL of

O_{2}

reacts to form

H_{2} O

, what is left at the end of the reaction ?

Q. In each of the following question, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer:

Assertion (A): There is a natural asymmetry between converting work to heat and converting heat to work.
Reason (R): No process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion into work.

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The correct option is D If (A) is incorrect and (R) is correct. (A) is wrong, but (R) is correct. H230 mL+12O215 mL reacted→H2O Volume of O2 left = 20 - 15 = 5 mL (R) is correct, since H2 is completely consumed, and hence is the limiting reagent.

The correct option is D
If (A) is incorrect and (R) is correct.

(A) is wrong, but (R) is correct.
$H_{2} 30 m L + \frac{1}{2} O_{2} 15 m L r e a c t e d \to H_{2} O$
Volume of $O_{2}$ left = 20 - 15 = 5 mL
(R) is correct, since $H_{2}$ is completely consumed, and hence is the limiting reagent.