Kinetics, Colloids, Solid State and Polymers

JKPSC Assistant Professor (Chemistry) · Chemistry · 59 practice questions with answers and explanations: 9 Easy, 50 Medium, 0 Hard.

Sample questions

Sample Easy question 1

Nylon-6,6 is a:

  1. Condensation polymer
  2. Natural polymer
  3. Addition polymer
  4. Elastomer
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Answer: A. It forms from hexamethylenediamine and adipic acid.

Sample Easy question 2

Vulcanisation of rubber uses:

  1. Nitrogen
  2. Chlorine
  3. Carbon
  4. Sulphur
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Answer: D. Sulphur forms cross-links.

Sample Easy question 3

The number of atoms per unit cell in a simple cubic lattice is:

  1. 2
  2. 1
  3. 8
  4. 4
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Answer: B. Each corner atom is shared by eight cells.

Sample Medium question 4

The Hardy–Schulze rule states that the coagulating power of an ion is:

  1. Zero
  2. Greater with higher valency of the oppositely charged ion
  3. Smaller with higher valency
  4. Independent of valency
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Answer: B. Al³⁺ is more effective than Na⁺ for a negative sol.

Sample Medium question 5

The Tyndall effect is the:

  1. Reflection of light
  2. Refraction of light
  3. Scattering of light by colloidal particles
  4. Absorption of light
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Answer: C. It makes the path of light visible.

Sample Medium question 6

The Brownian motion of colloidal particles is due to:

  1. Collisions with solvent molecules
  2. Heat of the sun
  3. Magnetism
  4. Gravity
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Answer: A. It was explained by Einstein.

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