Chemistry 2007 Waec Past Questions and Answers

Question 31 :

• WAEC 2007

Hydrocarbons which react with ammoniacal copper (l) chloride solution conform to the general molecular formula

A. C_nH_2n
B. C_nH_2n
C. C_nH_2n+2
D. C_nH_2n-2

Question 32 :

• WAEC 2007

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 33 :

• WAEC 2007

Which of the following compounds reacts readily with sodium to liberate hydrogen?

A. CH₃CH₂CH₃
B. CH₃COOH
C. CH₃ CH₂CHO
D. CH₃ CH(OH)CH₃

Question 34 :

• WAEC 2007

Glucose reduces Fehling's solution on warming to

A. Copper (l) oxide
B. Copper (ll) oxide
C. Copper (l) chloride
D. Copper (ll) hydroxide

Question 35 :

• WAEC 2007

from the following ores is iron extracted? I. Haematite ll. Bauxite III. Magnetite IV. Cassiterite

A. L and ll only
B. L and lll only
C. L, ll and lll only
D. L, ll, lll and lV