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Measurement in Science and Technology and Nature of ...

Measurement in Science and Technology and Nature of Matter - 1

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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements is/are correct about a colloidal solution?

  1. It must have components from all three phases, i.e. solids, liquids and gases.
  2. Dispersion medium is a component of a colloid.
  3. Dispersed phase is a component of a colloid.
  4. Both (2) and (3)
Question 2 Multiple Choice (Single Answer)

Which of the following mixtures is also a solution?

  1. Mixture of milk and water
  2. Mixture of sand and water
  3. Mixture of salt and water
  4. Mixture of cement and water
Question 3 Multiple Choice (Single Answer)

What is the SI unit of pressure?

  1. Atmosphere
  2. Bar
  3. Pascal
  4. mm of Hg
Question 4 Multiple Choice (Single Answer)

Which of the following pairs is not correctly matched?

  1. SI unit of temperature : Kelvin
  2. SI unit of mass : Kilogram
  3. SI unit of pressure : Pascal per square metre
  4. SI unit of weight : Newton
  5. SI unit of length : Metre
Question 5 Multiple Choice (Single Answer)

The units of latent heat are

  1. J kg-1
  2. J mol-1
  3. N kg-1
  4. N mol-1
Question 6 Multiple Choice (Single Answer)

Which of the following properties is not suitable for classification of matter?

  1. Chemical constitution
  2. Solubility
  3. Physical state
  4. None of these
Question 7 Multiple Choice (Single Answer)

Early Indian and Greek philosophers classified matter

  1. on the basis of physical properties
  2. on the basis of chemical properties
  3. as ‘Panch Tatva’
  4. as ‘Parmanu’
Question 8 Multiple Choice (Single Answer)

Methane is considered as a compound and not a mixture. Which of the following statements is incorrect regarding methane?

  1. It is composed of more than one element.
  2. Its elements are chemically combined.
  3. Its constituents can be separated only by chemical or electrochemical reactions.
  4. Its elements are combined in a variable proportion.
Question 9 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

a. Joseph L. Proust was the first scientist to use the symbols for elements in a very specific sense.
b. Dalton suggested that the symbols of elements be made from one or two letters of the name of the element.
c. IUPAC approves the names of the elements.

  1. a only
  2. b only
  3. c only
  4. a and b
  5. a and c
Question 10 Multiple Choice (Single Answer)

Oxygen dissolved in water, being used for breathing by the aquatic life, is a true solution of

  1. solid in solid
  2. gas in liquid
  3. liquid in liquid
  4. solid in liquid
Question 11 Multiple Choice (Single Answer)

The solute particle size in suspensions is

  1. less than 100 nm
  2. more than 10–5 cm
  3. more than 10–8 m
  4. between 1 nm and 100 nm
Question 12 Multiple Choice (Single Answer)

Which of the following statements is not true about matter?

  1. Particles of all forms of matter can be seen with naked eye.
  2. Particles of matter keep on dividing themselves into smaller and smaller particles.
  3. In all forms of matter, there is space among the particles.
  4. We can mix sugar in tea, coffee, etc. because of the presence of spaces among the particles of one form of matter.
Question 13 Multiple Choice (Single Answer)

Which of the following statements is/are correct?

a. The substance present in smaller proportion in a solution is called solvent.
b. A true solution is a homogeneous mixture of two or more substances.
c. A solution in which more solid can be dissolved at a given temperature is an unsaturated solution.

  1. a, b and c
  2. a and b
  3. a and c
  4. b and c
  5. c only
Question 14 Multiple Choice (Single Answer)

Which of the following is not a property of a compound?

  1. It is a pure substance.
  2. It is mixed in any proportion by mass.
  3. It cannot be separated into its constituents by physical means.
  4. It is composed of two or more elements.
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