Physics - Questions and Answers, General Study (GK)

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251.

Rate of diffusion is

(a)faster in gases than in liquids and solids

(b)equal in solids, liquids and gases

(c)faster in solids than in liquids and gases

(d)faster in liquids than in solids and gases

Comment

Answer is: ANA

252.

In a pressure cooker, the cooking is fast because

(a)more steam is available to cook the food at 1000°C

(b)the boiling point of water is lowered by the increased pressure

(c)the boiling point of water is raised by the increased pressure inside the cooker

(d)None of the above

Comment

Answer is: CNA

253.

It is difficult to cook at high altitude because

(a)of high moisture content here

(b)there is less oxygen in air

(c)due to decreases in atmospheric pressure, the boiling point of water decreases

(d)due to falling temperature, more heat has to be given

Comment

Answer is: CNA

254.

Heat capacity of substance is infinite. It means

(a)infinite heat is taken in

(b)infinite heat is given out

(c)no change in temperature whether heat is taken in or given out

(d)all of the above

Comment

Answer is: CNA

255.

A refrigerator, with its power on, is kept in closed room with its door open. The temperature of the room will

(a)fall

(b)rise

(c)remains the same

(d)none of the above

Comment

Answer is: BNA

256.

A closed bottle containing water at room temperature is taken to the moon and then the lid is opened. The water will

(a)boil

(b)freeze

(c)decompose into hydrogen and oxygen

(d)not change at all

Comment

Answer is: ANA

257.

Water density is maximum at the temperature of

(a)4

(b)-4

(d)none of these

Comment

Answer is: ANA

258.

The product of the pressure and volume of an ideal gas is

(a)directly proportional to its temperature

(b)inversely proportional to its temperature

(c)a constant

(d)approximately equal to the universal gas constant

Comment

Answer is: ANA

259.

A gas behaves as an ideal gas more closely at

(a)low pressure and high temperature

(b)high pressure and high temperature

(c)low pressure and low temperature

(d)high pressure and low temperature

Comment

Answer is: CNA

260.

Pressure exerted by gas is

(a)inversely proportional to the density of the gas

(b)independent of the density of the gas

(c)directly proportional to the square of the density of the gas

(d)directly proportional to the density of the gas

Comment

Answer is: DNA

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Physics - Questions and AnswersPage 26

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