Waec Chemistry Past Questions For Year 2014

Question 41

Consider the reaction represented by the following equation: C₂H_4(g)

+ 30_2(g) → 2CO_2(g) + 2H₂O_(g)How many moles of ethene would be burnt to produce 0.1 mole of water?

waec 2014

• A. 0.05 mole
• B. 0.10 mole
• C. 0.20 mole
• D. 2.00 moles

Question 42

The liquid hydrocarbon likely to be found in the fraction of crude oil used for domestic cooking is?

waec 2014

• A. C₃H₈
• B. C ₅H ₁₂
• C. C₁₃H₂₈
• D. C₂₀H₄₂

Question 43

The oxide from electric power station is

waec 2014

• A. carbon (IV) oxide
• B. copper (ll) oxide
• C. nitrogen (IV) oxide
• D. sulphur (IV) oxide

Question 44

The most common process in the extraction of metals from their ore is

waec 2014

• A. catalysis
• B. electrolysis
• C. oxidation
• D. reduction

Question 45

Which of the following gases is used to retard the vaporization of the filament in a light bulb?

waec 2014

• A. Argon
• B. Helium
• C. Hydrogen
• D. Oxygen