Waec Chemistry Past Questions For Year 2016
Question 11
The mass of potassium hydroxide required to make 300.ocm3 of 0.4 moldm-3 solution is {KOH = 56.0}
- A. 26.88g
- B. 13.44g
- C. 6.72g
- D. 3.36g
Question 12
An element X froms the following oxides X2O, XO and XO2. This phenomenon illustrates the law of________?
- A. Conservation of mass
- B. Definite proportion
- C. Mass action
- D. Multiple proportion
Question 13
The bond formed between H2O and H+ to form the hydroxonium H3O+ is
- A. Dative
- B. Covalent
- C. Electrovalent
- D. Ionic
Question 14
The minimum amount of energy required for effective collisions between reacting particles is known as
- A. Activation energy
- B. Bond energy
- C. Kinetic energy
- D. Potential energy
Question 15
Which of the following elements would produce coloured ion in agueous solution?
- A. Calcuim
- B. Copper
- C. Magnesuim
- D. Sodium
