Waec Chemistry Past Questions For Year 2001
Question 36
Acidic industrial waste can be treated with
- A. lime
- B. brine
- C. water
- D. enthanol
Question 37
A major factor coonsidered in selecting a suitable method for preparing a simple salt is its
- A. crystalline form
- B. melting point
- C. reactivity with dilute acids
- D. solubility in water
Question 38
The gas given off when NH4Cl is heated with an alkali is
- A. H2
- B. CI2
- C. N 2
- D. NH 3
Question 39
What volume of hydrogen will be produced if 100cm3 of ammonia is completely decomposed at constant temperature and pressure? The equation for the reaction is 2NH3(g) → N2(g) + 3H2(g)
- A. 50cm3
- B. 150cm3
- C. 200cm3
- D. 300cm3
Question 40
Which of the following decreases when a given mass of gas is compressed to half its initial volume?
- A. Average intermolecular distance
- B. Frequency of collisions
- C. Number of molecules present
- D. Atomic radius of each particle
