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Standard XII

Physics

Ideal Gas Equation

Assertion: Vo...

Question

Assertion: Volume of gas at 50 $^{0}$ C is V. Keeping the pressure constant, the temperature is doubled. Volume becomes 2V.
Reason: At constant pressure, the volume of gas is directly proportional its to absolute temperature.

Both assertion (A) and reason (R) are correct and R gives the correct explanation

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Both assertion (A) and reason (R) are correct but R doesnt give the correct explanation

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A is true but R is false

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A is false but R is true

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Solution

The correct option is A Both assertion (A) and reason (R) are correct and R gives the correct explanation
Since PV=nRT
therefore, at constant P
V=nRT/P
therefore if we double T then V will also gets doubled
both assertion and reason are correct and reason is true explanation of assertion
option(A)

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Similar questions

Q. Assertion (A): At constant temperature,

P V

P

plot for real gases is not a straight line.
Reason (R): At high pressure all gases have

(Z > 1)

but at intermediate pressure most gases have

(Z < 1)

In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.

Assertion (A) The temperature at which vapour pressure of a liquid is equal to the external pressure is called boiling temperature.

Reason (R) At high altitude atmospheric pressure is high.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is the correct explanation of A

(d) A is false but R is true.

Q. Assertion (A)
If the volumes of two spheres are in the ratio 27 : 8, then their surface areas are in the ratio 3 : 2.

Reason (R)
Volume of a sphere =

\frac{4}{3} π R^{3}

Surface area of a sphere =

4 π R^{2}

(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.

Q. Assertion (A)
The curved surface area of a cone of base radius 3 cm and height 4 cm is 15π cm².

Reason (R)
Volume of a cone = πr²h

(a) Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true but Reason (R) is not a correct explanation of Assertion (A).
(c) Assertion (A) is true and Reason (R) is false.
(d) Assertion (A) is false and Reason (R) is true.

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.

Assertion (A) At constant temperature, PV vs V plot for real gases is not a straight line.

Reason (R) At high pressure all gases have Z > 1 but at an intermediate pressure, most gases have Z < 1.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true R is not the correct explanation of A

(d) A is false but R is true

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Assertion: Volume of gas at 500C is V. Keeping the pressure constant, the temperature is doubled. Volume becomes 2V.Reason: At constant pressure, the volume of gas is directly proportional its to absolute temperature.

The correct option is A Both assertion (A) and reason (R) are correct and R gives the correct explanationSince PV=nRTtherefore, at constant PV=nRT/Ptherefore if we double T then V will also gets doubledboth assertion and reason are correct and reason is true explanation of assertionoption(A)

Assertion: Volume of gas at 50 $^{0}$ C is V. Keeping the pressure constant, the temperature is doubled. Volume becomes 2V.
Reason: At constant pressure, the volume of gas is directly proportional its to absolute temperature.

The correct option is A Both assertion (A) and reason (R) are correct and R gives the correct explanation
Since PV=nRT
therefore, at constant P
V=nRT/P
therefore if we double T then V will also gets doubled
both assertion and reason are correct and reason is true explanation of assertion
option(A)