Waec Chemistry Past Questions For Year 2001

Question 31

Sugars can be hydrolyzed at room temperature by the action of

waec 2001

• A. mineral acids
• B. strong bases
• C. enzymes
• D. oxidants

Question 32

Which of the following constitutes an advantage in the use of hard water?

waec 2001

• A. Formation of scum with soap
• B. Furring of kettles
• C. Blockage of water pipes
• D. Formation of strong bones

Question 33

What is the function of H₂SO₄ in the following reaction? C₁₂

H₂₂O₁₁ conc. H₂4 12C + 11H₂O

waec 2001

• A. Oxidizing agent
• B. Strong acid
• C. Dehydrating agent
• D. Catalyst

Question 34

The conclusion from Rutherford's from radioactive substance alpha-scattering experiment is that

waec 2001

• A. atoms are mostly empty space with a samll
• B. emissions from radioactive substances consist of three main components
• C. there is unclear pull on orbital electrons
• D. electrons are deflected by both magnetic and electric fields

Question 35

Waste plastics accumulate in the soil and pollute the environment because plastic materials are

waec 2001

• A. insoluble in water
• B. non-biodegradable
• C. easily affected by heat
• D. inflammable