Waec Chemistry 2016 Past Questions and Answers

Question 26:

• WAEC 2016

When NH₄Cl_(s) is dissolved in water, the container feels cold to touch. This implies

A. The process is endothermic
B. The process is exothermic
C. NH₄Cl forms a saturated solution
D. NH₄Cl is highly soluble in water

Question 27:

• WAEC 2016

The pH of four solutions M,N,Q and R are 2,6,8 and 11 respectively.
Which of the following deductions about the solutions is correct?

A. The pH of N is increased when the solution is diluted
B. The pH of Q is increased when the solution is evaporated
C. M is the most alkaline solution
D. R is the most acidic solution

Question 28:

• WAEC 2016

Consider the following reaction equation
H₃O⁺_(aq) + OH_(aq) \(\rightarrow\) 2H₂O₍₁₎
The reaction represents

A. Esterification
B. Hydrolysis
C. Neutralization
D. Redox

Question 29:

• WAEC 2016

The refreshing characteristic taste of fizzy drinks is due ot the presence of

A. Carbon(IV)oxide
B. Glucose
C. Hydrogen
D. Sodium Citrate

Question 30:

• WAEC 2016

Chemical equilibrium is attained when

A. All the reactants have been completely used up
B. The reaction goes to completion
C. The concentration of reactants and products remain constant
D. The concentration of reactants and products are equal