Chemistry 2018 Past Questions | JAMB

Study the following Chemistry past questions and answers for JAMBWAEC  NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.

  1. A given amount of gas occupies 10.0dm5 at 4atm and 273°C. The number of moles of the gas present is [Molar volume of gas at s.t.p = 22.4dm 3

     

  • A. 0.89 mol
  • B.  1.90 mol
  • C. 3.80 mol
  • D. 5.70 mo

2. According to Charles’ law, the volume of a gas becomes zero at

  • A. 0°C
  • B. -100°C 
  • C. -273°C
  • D. -373°C

3. A substance that is used as a ripening agent for fruits is

  • A. Ethene
  • B. Propane
  • C. Methane
  • D. Butane

4. The Sulphide which is insoluble in dilute hydrochloric acid is

  • A. FeS
  • B. CuS
  • C. ZnS
  • D. Na2S

5. What is the PH of 0.00 1 moldm3   solution of the sodium hydroxide

  • A. 14
  • B. 13
  • C. 12
  • D. 11

6.  The type of bonding in [Cu(NH\(_3\))\(^4\)]\(^{2+}\) is 

  • A. coordinate
  • B. electrovalent
  • C. metallic
  • D. covalent

7.  Which of the following is an example of a chemical change?

  • A. Dissolution of salt in water
  • B. Rusting of iron
  • C. Melting of ice
  • D. Separating a mixture by distillation

8.  To what temperature must a gas at 273k be heated in order to double both its volume and pressure?

  • A. 298K
  • B. 546K
  • C. 819K
  • D. 1092K

9. According to the Kinetic Theory an increase in temperature causes the kinetic energy of particles to

  • A. Decrease
  • B. Increase
  • C. Be zero
  • D. Remain constant

10.  An element used in the production of matches is

  • A. Nitrogen
  • B. Aluminium
  • C. Copper
  • D. Sulphur

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