## 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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