WBBSE For Class 9 Physical Science And Environment Chapter 3 Matter: Structure And Properties MCQS

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Chapter 3 Matter: Structure And Properties MCQs

Question 1. Atmospheric pressure is measured by 

  1. Hygrometer
  2. Pyrometer
  3. Barometer
  4. Spherometer

Answer: (3) Barometer

Question 2. Construction of a submarine is based on 

  1. Archimedes’ principle
  2. Bernoulli’s theorem
  3. Pascal’s law
  4. Boyle’s law

Answer: (1) Archimedes’ principle

Read And Learn More WBBSE Solutions For Class 9 Physical Science And Environment MCQS

Question 3. Why is the dam of water reservoir thick at the bottom?

  1. Quantity of water increases with depth
  2. Density of water increases with depth
  3. Pressure of water increases with depth
  4. Temperature of water increases with depth

Answer: (3) Pressure of water increases with depth

WBBSE For Class 9 Physical Science And Environment Chapter 3 Matter Structure And Properties MCQS

WBBSE Class 9 matter structure and properties MCQs with answers

Question 4. A wooden block is taken to the bottom of a deep, calm lake and then released. It rises up with a

  1. Constant acceleration
  2. Decreasing acceleration
  3. Constant velocity
  4. Decreasing velocity

Answer: (3) Constant acceleration

Question 5. A capillary tube made of glass is dipped into mercury. Then

  1. Mercury rises in the capillary tube
  2. Mercury falls in the capillary tube
  3. Mercury rises and flows out of the capillary tube
  4. Mercury neither rises nor falls in the capillary tube.

Answer: (2) Mercury falls in the capillary tube

Question 6. If the diameter of a capillary tube be doubled then the height of the liquid that will rise is

  1. Twice
  2. Half
  3. Same as earlier
  4. None

Answer: (2) Half

Question 7. Two pieces of glass plates, one upon the other, with a little water in between them cannot be separated easily because of 

  1. Inertia
  2. Pressure
  3. Surface tension
  4. Viscosity

Answer: (3) Surface tension

Matter structure and properties multiple choice questions for WBBSE Class 9

Question 8. There is dip in the capillary tube when the angle of contact 6 is 

  1. θ= 90°
  2. θ= 0°
  3. θ> 90°
  4. θ< 90° but not zero

Answer: (4) θ< 90° but not zero

Question 9. The rise of liquid in a capillary tube has a meniscus. If the angle of contact be 90°, the shape of the meniscus is 

  1. Concave
  2. Convex
  3. Flat
  4. None

Answer: (3) Flat

Question 10. In Bernoulli’s theorem, which of the following is conserved?

  1. Mass
  2. Linear momentum
  3. Energy
  4. Angular momentum

Answer: (3) Energy

Question 11. The gale blows over a house. The force due to gale on the roof is 

  1. In the direction downward
  2. In direction upward
  3. Zero
  4. In the horizontal direction

Answer: (1) In direction upward

Important matter structure questions for Class 9 Physical Science

Question 12. To calculate the flow of a liquid, which of the following is used?

  1. Stoke’s law
  2. Bernoulli’s theorem
  3. Poisseuille’s law
  4. Conservation of pressure

Answer: (3) Poisseuilie’s law

Question 13. In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from

  1. Pascal’s law
  2. Stoke’s law
  3. Bernoullis’ principle
  4. Archimedes’ principle

Answer: (3) Bernoullis’ principle

Question 14. On which of the following the terminal velocity of a solid ball in a viscous fluid’ is dependent?

  1. Area f cross-section
  2. Height of the liquid
  3. Density of both
  4. Density of the liquid

Answer: (2) Height of the liquid

Question 15. A body of weight mg is hanging on a strain, which extends its length by I. The work done in extending the string is

  1. mgl
  2. mgl/2
  3. 2mgl
  4. None of these

Answer: (2) mgl/2

Question 16. Scent sprayer is based on

  1. Charle’s law
  2. Archimedes’ principle
  3. Boyle’s law
  4. Bernoulli’s theorem

Answer: (4) Bernoulli’s theorem

WBBSE Class 9 Physical Science MCQs on states of matter

Question 17. According to Hooke’s law of elasticity, if stress is increased the ratio of stress to strain

  1. Increases
  2. Decreases
  3. Becomes zero
  4. Remains constant

Answer: (4) Remains constant

Question 18. When a body remains immersed in water its weight

  1. Increases
  2. Remains same
  3. Decreases
  4. None of these

Answer: (2) Remains same

Question 19. When a body weights more than that of the liquid displaced by it, the mildly

  1. Floats
  2. Sinks
  3. Partly floats
  4. Partly sinks

Answer: (2) Sinks

Question 20. Artesian well works on the principle of

  1. Liquid finds its own level
  2. Buoyancy
  3. Newton’s Third law
  4. Conservation of linear momentum

Answer: (1) Liquid finds its own level

Solved MCQs on matter and its properties for WBBSE Class 9

Question 21. Lower part of a ship sinks more when the ship enters from

  1. Sea-to-river water
  2. River water to sea water
  3. Both (1) and (2)
  4. None of these

Answer: (1) Sea-to-river water

Question 22. Lowermost layer of the atmosphere is

  1. Troposphere
  2. Stratosphere
  3. Ionosphere
  4. None of these

Answer: (1) Troposphere

Question 23. When the weight of a body is equal to the weight of the liquid displaced by it, the body

  1. Floats partly immersed
  2. Floats totally immersed
  3. Sinks completely
  4. Floats half immersed

Answer: (4) Floats totally immersed

Question 24. When the weight of a body is less than the weight of the liquid displaced by it the body

  1. Floats parties immersed
  2. Floats totally immersed
  3. Sinks completely
  4. Floats half immersed

Answer: (1) Floats partly immersed

Question 25. A boat floats in water because water exerts

  1. Downward pressure
  2. Lateral pressure
  3. Vertical downward thrust
  4. No pressure

Answer: (3) Vertical downward thrust

Question 26. The buoyancy of a liquid is its

  1. Lateral thrust
  2. Vertical downward thrust
  3. Vertical upward thrust
  4. Volume displaced by a solid

Answer: (2) Vertical downward thrust

Question 27. The immersed portion of a piece of ice in water is

  1. 8/9th of its volume
  2. 9/10th of its volume
  3. 1/11th of its volume
  4. 11/12th of its volume

Answer: (4) 11/12th of its volume

Physical and chemical properties of matter MCQs Class 9 WBBSE

Question 28. It is easier to swing in sea water than in a pond because

  1. Sea water is never still
  2. Atmospheric pressure is highest at the sea level
  3. Density of seawater is higher than that of ordinary water.
  4. None of these reasons are correct.

Answer: (3) Density of seawater is higher than that of ordinary water.

Question 29. A sinker weights 45 g-wt in air and 25 g-wt in water, the upthrust on it is

  1. 25 g-wt
  2. 45 g-wt
  3. 20 g-wt
  4. None of these

Answer: (3) 20 g-wt

Question 30. S.1. unit of pressure is

  1. Pascal
  2. kg/\(m^{-2}\)
  3. Atmosphere
  4. None of these

Answer: (1) Pascal

Question 31. Upthrust depends upon

  1. Volume
  2. Density
  3. g
  4. All of these

Answer: (4) All of these

Question 32. If the density of the object placed in a liquid is equal to the density of the liquid, the object will

  1. Float wholly immersed
  2. Float half immersed
  3. Sink
  4. Float completely above the liquid

Answer: (2) Float wholly immersed

Question 33. Atmospheric pressure is measured by

  1. Hydrometer
  2. Barometer
  3. Sonometer
  4. Ammeter

Answer: (2) Barometer

Question 34. The relative density s of a substance is related to the density of the substance Ppand density of water at 4°C d. The exact relation between them is

  1. s=pxd
  2. s\(=\frac{d}{\rho}\)
  3. s\(=\frac{\rho}{d}\)
  4. s\(=\frac{1}{\rho d}\)

Answer: (3)s\(=\frac{\rho}{d}\)

Question 35. SI unit of surface tension is

  1. Nm
  2. kgf\(m^{-1}\)
  3. m\(N^{-1}\)
  4. N\(m^{-1}\)

Answer: (4) N\(m^{-1}\)

Question 36. The terminal velocity of a spherical body depends on

  1. Radius of the body
  2. Density of the medium
  3. Viscosity of the medium
  4. All of these

Answer: (4) All of these

Best multiple choice questions on matter structure and properties for WBBSE Class 9

Question 37. Bernoulli’s theorem is based on the conservation of

  1. Mass
  2. Mass and energy
  3. Energy
  4. None of these

Answer: (3) Energy

Question 38. With increase of temperature, the elasticity of a material

  1. Increases
  2. Decreases
  3. Remains unchanged
  4. Nothing can be said

Answer: (2) Decreases

Question 39. The solids which break soon after crossing elastic limit are called

  1. Ductile
  2. Brittle
  3. Malleable
  4. Plastic

Answer: (2) Brittle

Question 40. Dimension of density is

  1. M\(L^{-2}\)
  2. M\(L^{-3}\)
  3. L\(T^{-3}\)
  4. M\(L^{-4}\)

Answer: (2) M\(L^{-3}\)

Question 41. S.1. unit of pressure is

  1. N
  2. N/\(m^{2}\)
  3. N.m
  4. N/m

Answer: (4) N/\(m^{2}\)

Question 42. A body floats in a liquid contained in a beaker. The whole system falls freel under gravity. The upward thrust on the body due to the liquid then is

  1. Zero
  2. Equal to the liquid displaced
  3. Equal to the weight of the body in air
  4. Equal to the weight of the immersed portion in the liquid

Answer: (1) Zero

Question 43. Clouds float in the atmosphere on account of their

  1. Low viscosity
  2. Low density
  3. Low temperature
  4. Creation of low pressure

Answer: (2) Low density

WBBSE Class 9 Physical Science atomic structure and bonding MCQs

Question 44. After terminal velocity is reached, the acceleration of a body falling through a fluid is

  1. Equal to g
  2. Zero
  3. Less than g
  4. More than g

Answer: (2) Zero

Question 45. The property by virtue of which a fluid tries to prevent the relative motion between adjacent layers is called

  1. Elasticity
  2. Rigidity
  3. Viscosity
  4. Cohesion

Answer: (3) Viscosity

Question 46. The pressure energy per unit weight of a liquid is

  1. \(\frac{p}{\rho}\)
  2. P
  3. P\(. \rho\)
  4. \(\frac{\rho}{p}\)

Answer: (1)\(\frac{p}{\rho}\)

Question 47. Which one of the following substances has the greatest velocity?

  1. Water
  2. Mercury
  3. Oxygen
  4. Hydrogen

Answer: (2) Mercury

Question 48. A drop of liquid is assumed to be spherical shaped because of

  1. Density
  2. Viscosity
  3. Gravitation
  4. Surface tension

Answer: (4) Surface tension

Question 49. The modulus of elasticity is dimensionally equivalent to

  1. Stress
  2. Strain
  3. Directly proportional to strain
  4. Inversely proportional to strain

Answer: (3) Directly proportional to strain

 

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