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JAMB UTME Chemistry 2000 past questions and answers

This 2000 JAMB UTME Chemistry set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2000 set with instant marking.

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Sample JAMB UTME Chemistry 2000 questions

1. A drop of bromine vapour spreads through a closed jar of air without stirring. Which property of gases chiefly accounts for this?
  1. Gas particles are fixed in position
  2. Gas particles have no mass
  3. Gas particles move randomly and mix by diffusion
  4. Gas particles attract one another strongly

Answer: C. Gas particles move randomly and mix by diffusion

Random motion allows gas particles to diffuse from regions of higher concentration into the surrounding air.

2. Which method is most suitable for separating two miscible liquids whose boiling points differ greatly?
  1. Simple distillation
  2. Filtration
  3. Separating funnel
  4. Sublimation

Answer: A. Simple distillation

Simple distillation separates miscible liquids by vaporizing and condensing the more volatile liquid.

3. How many neutrons are present in an atom of chlorine-37 with atomic number 17?
  1. 17
  2. 20
  3. 37
  4. 54

Answer: B. 20

The number of neutrons is the mass number minus the atomic number, so 37 - 17 = 20.

4. What is the relative formula mass of Al2(SO4)3? (Al = 27, S = 32, O = 16)
  1. 294
  2. 324
  3. 336
  4. 342

Answer: D. 342

The total is 2(27) + 3(32) + 12(16) = 342.

5. What is the shell electronic configuration of a calcium ion, Ca2+, given that calcium has atomic number 20?
  1. 2, 8, 10
  2. 2, 8, 8
  3. 2, 8, 8, 2
  4. 2, 8, 6

Answer: B. 2, 8, 8

A calcium atom loses its two outer electrons to form Ca2+, leaving the configuration 2, 8, 8.

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