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Standard XII

Physics

What Are Fluids?

Assertion A T...

Question

Assertion (A) The solids are more elastic and gases are least elastic.
Reason (R) It is so because for the given stress applied the gases are more compressible than that of solids.
Which of the following options is correct?

Both A and R are true and R is the correct explanation of A

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

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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 A and R are true and R is the correct explanation of A
Solids can easily sustain stress without permanent change in shape while gases cannot. This is because, gases being fluid are easily compressible, even under slight stress.

So both A and R are true, and R correctly explains the A.

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Similar questions

Assertion (A): Steel is more elastic than rubber.

Reason (R) : Under a given deforming force, steel is deformed less than rubber.

A) Both Assertion and Reason are true and the reason is correct explanation of the assertion
B)Both Assertion and Reason are true, but reason is not correct explanation of the assertion
C) Assertion is true, but the reason is false
D) Assertion is false, but the reason 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

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) Gases do not liquefy above their critical temperature, even on applying high pressure.

Reason (R) Above critical temperature, the molecular speed is high and intermolecular attractions cannot hold the molecules together because they escape because of high speed.

(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 not the correct explanation of A

(d) A is false but R is true

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:

(a)

If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b)

If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c)

If assertion is true but reason is false.

(d)

If assertion is false but reason is true.
Assertion: 4-nitrophenol is more acidic than picric acid.
Reason: Phenol is a weaker acid than carbonic acid.

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Assertion (A) The solids are more elastic and gases are least elastic.Reason (R) It is so because for the given stress applied the gases are more compressible than that of solids.Which of the following options is correct?

Assertion (A) The solids are more elastic and gases are least elastic.
Reason (R) It is so because for the given stress applied the gases are more compressible than that of solids.
Which of the following options is correct?