Waec Chemistry Past Questions For Year 2002
Question 36
When alkynes are hydrogenated completely they produce compounds with the general molecular formula
- A. CnHn
- B. CnH2n
- C. CnH2n+2
- D. CnH2n-2
Question 37
Which of the following compounds can be represented by the molecular formula C2H6O?
- A. Propanal
- B. Ethanol
- C. Methanoic acid
- D. Glucose
Question 38
When concentrated sodium chloride solution is electrolysed using inert electrodes, the products are
- A. oxygen and hydrogen
- B. hydrogen and chlorine
- C. sodium and oxygen
- D. sodium and chlorine
Question 39
A suitable reagent for distinguishing between ethanoic acid ethanol is
- A. bromine water
- B. Fehling's solution
- C. sodium hydrogentrioxocarbonate (IV)
- D. ammoniacal silver trioxonitrate (V)
Question 40
Which of the following types of alkanols undergo oxidation to produce alkanoic acids? 1. Primary alkanols 11. Secondary alkanols 111. Tertiary alkanols
- A. 1,11 and 111
- B. l and ll only
- C. ll only
- D. l only
