Physics - General Properties of Matter

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Question - 1

Consider the following statements and select the correct code

1. Manometer is a device for measuring differences in pressure usually by noting the difference in the height of two liquid columns.

2. Sphygmomanometer is a device used to measure blood pressure.

  • A Only 1
  • B Only 2
  • C 1 and 2
  • D Nither 1 nor 2

Question - 2

Which one of the following is used by the mountaineers and the pilots to measure pressure?

  • A Simple barometer
  • B Fortin barometer
  • C Manometer
  • D Aneroid barometer

Question - 3

A gradual increase in the barometric height indicates which one of the following?

  • A Coming of rain
  • B Coming of a storm
  • C Starting of cold weather
  • D Coming of fair weather

Question - 4

Consider the following statements

1. Those substances, with expand on freezing, have their melting point lowered by the increase of pressure, where as those substances which contract on freezing have their melting points raised by the increase of pressure.

2. The phenomenon that ice melts on application of pressure and again solidifies when the pressure is released is known as regelation.

Which of the statements(s) given above is/are correct?

  • A Only 1
  • B Only 2
  • C Both 1 and 2
  • D Neither 1 nor 2

Question - 5

Consider the following statements 

An external pressure po is applied to the surface of liquid in a container. Then,

1. The pressure on all side walls increase by p

2.The pressure on the bottom wall increased by p .

3. The pressure at all points inside the liquid increases by po .

Which of the statement(s) given above is/are correct?

  • A 1, 2 and 3
  • B 1 and 2
  • C 1 and 3
  • D 2 and 3

Question - 6

Why do two ice blocks join to form one block when pressed together?

  • A Melting point of ice is lowered with increase in pressure
  • B Melting point of ice increases with increase pressure
  • C Melting point of ice remains unchanged with increases in pressure 
  • D Melting point of ice 0o C

Question - 7

Assertion (A)  When water flows in a uniform horizontal pipe, there is fall in pressure of water along the pipe.

Reason (R) Force is required to maintain the motion of the liquid against friction code.

  • A Both A and R are individually true and R is the correct explanation of A
  • B Both A and R are individually true but R is not the correct explanation of A
  • C A is true but R is false
  • D A is false but R is true

Question - 8

Consider the following statements 

1. SI unit of atmospheric pressure is Nm-2 or pascal and CGS unit is dyne/cm2 .

2. The barometer is device by which the atmospheric pressure is measured.

3. The standard atmospheric pressure is the pressure required of 76 cm of Hg column or 760 mm of Hg column, which is equivalent to 1 atm.

which of the statements given above is/are correct?

  • A 1 and 2
  • B Only 1
  • C 2 and 3
  • D 1, 2 and 3

Question - 9

The principle of cleaning by soap is

  • A surface tension
  • B floatation
  • C viscosity
  • D elasticity

Question - 10

A block of ice floating in a glass containing water. When the ice melts completely, the level of the water in the glass will

  • A rise
  • B fall
  • C not change
  • D None of the above