Waec Chemistry Past Questions For Year 2007
Question 31
Consider the reaction below: Vegetable oil \(\frac{H2;NI catalyst}{High temperature}\) product. The reaction is applied in the manufacture of?
- A. drugs
- B. margarine
- C. paraffin wax
- D. soapy detergents
Question 32
Hydrocarbons which react with ammoniacal copper (l) chloride solution conform to the general molecular formula
- A. CnH2n
- B. CnH2n
- C. CnH2n+2
- D. CnH2n-2
Question 33
Alkenes undergo the following reactions except
- A. addition
- B. hydration
- C. polymerization
- D. substitution
Question 34
What volume will 0.5 g of H2 occupy at s.t.p? [H = 1; 1 mole of a gas occupy 22.4 dm3 at s.t.p.]
- A. 2.24 dm3
- B. 5.60dm3
- C. 11.20dm3
- D. 44.80dm3
Question 35
Pig-iron is brittle because it contains
- A. a high percentage of carbon as impurity
- B. calcium trioxosilicate (IV)
- C. unreacted haematite
- D. undecomposed limestone
