Kerala SCERT Class 7 Science Chapter 7 Pressure in Liquids and Gases Question Answer Solution Here. Kerala Board Class 7 Students can find Here 7th Chapter Pressure in Liquids and Gases Notes provide by our Teacher. Important Question Answer from Chapter 7 Pressure in Liquids and Gases.
- Board- Kerala Board.
- Class – 7.
- Subject – Science Part 2
- Chapter – 6.
- Chapter Name – Pressure in Liquids and Gases.
- Topic – Question Answer Solution.
Multiple choice questions.
(1) The force exerted by gas per unit area of the surface is
a) pressure of gas
b) atmospheric pressure
c) both
d) none.
(2) The force exerted per unit area by atmospheric air is
a) pressure of gas
b) atmospheric pressure
c) both
d) none.
(3) Device used to measure atmospheric pressure is
a) Manometer
b) barometer
c) both
d) none.
(4) devices that works on the basis of atmospheric pressure are
a) Syringe
b) Straw
c) Dropper
d)All the above.
(5) Bernoulli’s Principle is utilised in the
a) take off of aeroplanes
b) aerodynamic structures of motor cars.
c) both
d) none.
(6) Liquids exert pressure in
a) one direction
b) both direction
c) All direction
d) none.
Questions and answers.
(1) Who discovered barometer?
ANS: Torricelli discovered barometer.
(2) Siphon works on which pressure?
ANS: Siphon is a device that works on the basis of atmospheric pressure.
3) What is mean by liquid pressure?
ANS: The pressure exerted by a liquid is called liquid pressure.
(4) What is the reason for the inflation of the balloon fixed to the PVC pipe?
ANS: The reason for the inflation of the balloon fixed to the PVC pipe is also due to the pressure exerted by water.
(5) Which device used to measure liquid pressure?
ANS: Pressure gauge is a device used to measure liquid pressure.
Short questions and answers.
(1) What is Bernoulli’s Principle? States its applications?
ANS:
Bernoulli’s Principle: Pressure of air reduces when it moves fast.
Applications :i) take off of aeroplanes
ii) aerodynamic structures of motor cars.
(2) Which are devices that works on the basis of atmospheric pressure?
ANS: Devices are given below:
i) Siphon
ii) Syringe
iii) Straw
iv) Dropper.