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CBSE Class 11 (Science) Mechanical Properties of Solids and Fluids — practice questions — page 3

Explore 257 free Mechanical Properties of Solids and Fluids questions in CBSE Class 11 (Science) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Mechanical Properties of Solids and Fluids questions and exercises with answers

Showing questions 61–90 of 257.

Water placed on a lotus leaf:Read the answer and worked solution →Water placed on a clean plastic plate:Read the answer and worked solution →An obtuse angle of contact means the liquid:Read the answer and worked solution →Mercury placed on any ordinary surface:Read the answer and worked solution →Water sticks to glass, but mercury does not:Read the answer and worked solution →Oil climbs up a cotton wick in spite of:Read the answer and worked solution →Sap and water rise up to the top of the leaves of a:Read the answer and worked solution →The hair of a paint brush forms a fine tip when it is:Read the answer and worked solution →Free liquid drops and bubbles are spherical if we neglect:Read the answer and worked solution →For a given volume the least surface area belongs to a:Read the answer and worked solution →The pressure inside a spherical drop, against that outside, is:Read the answer and worked solution →Detergents and dying substances act as:Read the answer and worked solution →Waterproofing agents are added to create a large:Read the answer and worked solution →True or false on surface tensionRead the answer and worked solution →Wets or does not wetRead the answer and worked solution →Match each case to what happensRead the answer and worked solution →Quick picks on surface tensionRead the answer and worked solution →Small or large angle of contactRead the answer and worked solution →Why a free drop turns sphericalRead the answer and worked solution →Fill the gaps on surface tensionRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →The force a liquid exerts on a submerged surface is always:Read the answer and worked solution →Pressure is defined as the normal force acting per unit:Read the answer and worked solution →Pressure is which kind of physical quantity?Read the answer and worked solution →The SI unit of pressure is named after the scientist:Read the answer and worked solution →Blaise Pascal was a scientist from:Read the answer and worked solution →The first method of measuring atmospheric pressure came from:Read the answer and worked solution →Torricelli's pressure measuring device is known as the mercury:Read the answer and worked solution →In the barometer, the tube of mercury is set up:Read the answer and worked solution →At sea level the barometric mercury column stands at about:Read the answer and worked solution →

Worked practice questions

Water placed on a lotus leaf:

  1. Spreads evenly
  2. Soaks straight in
  3. Freezes quickly
  4. Forms droplets
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Correct answer: D. Forms droplets

1. Water is attracted more to itself than to the waxy leaf. 2. The angle of contact is large in this case. 3. So the water gathers into droplets on the leaf. _Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._

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Water placed on a clean plastic plate:

  1. Spreads over it
  2. Forms droplets
  3. Rolls straight off
  4. Stays as a ball
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Correct answer: A. Spreads over it

1. Here the liquid is strongly attracted to the solid. 2. The angle of contact is small in this case. 3. So the water spreads over the plate. _Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._

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An obtuse angle of contact means the liquid:

  1. Spreads flat
  2. Does not wet
  3. Wets it fully
  4. Soaks right in
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Correct answer: B. Does not wet

1. An obtuse angle means the liquid clings to itself strongly. 2. Making a liquid to solid surface then costs a lot of energy. 3. So the liquid does not wet the solid. _Source: syllabus Physics Part II, Chapter 10, Mechanical Properties of Fluids._

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