Waec Chemistry Past Questions For Year 1995
Question 16
H3O+(aq) + OH-(aq) → 2H2O(l). The heat change accompanying the process represented by the equation above is the heat of
- A. neutralization
- B. formation
- C. solution
- D. dilution
- E. hydration
Question 17
Which of the following is not correct of the reaction represented by the equation below? 2C(s) + O2(g) → 2CO(g); ∆H = - xKJ
- A. there is an increase in entropy ;
- B. There is anincrease in gaseous volume
- C. Carbon (lV) oxide is produced
- D. The oxidation number of carbon increases from 0 to +2
- E. The reaction is exothermic
Question 18
Which of the following is an alloy of mercury?
- A. Stainless steel
- B. Soft solder
- C. Coinage bronze
- D. Amalgam
- E. Duralumin
Question 19
The following alkanols will yield alkanoic acids on reacting with excess acidified K2Cr2O7 except
- A. CH3CH2OH
- B. (CH3)2CHCH2OH
- C. (CH3)3CCH2OH
- D. (CH3)3COH
- E. CH3CH2CH2CH2OH
Question 20
In which of the following processes are larger molecules broken down into smaller molecules?
- A. Vulcanization of rubber
- B. Hydrogenation of palm oil
- C. Hydrolysis of starch
- D. Polymerization
- E. Esterification
