Waec Chemistry 2001 Past Questions and Answers

Question 36:

• WAEC 2001

Acidic industrial waste can be treated with

A. Lime
B. Brine
C. Water
D. Enthanol

Question 37:

• WAEC 2001

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

A. Insoluble in water
B. Non-biodegradable
C. Easily affected by heat
D. Inflammable

Question 38:

• WAEC 2001

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

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 39:

• WAEC 2001

If a metal R forms a compound with the formula R(NO₃)₂ the formula of its tetraoxosulphate (VI) is

A. R(SO₄)₂
B. RSO₄
C. R₂SO₄
D. R₂(SO₄)₃

Question 40:

• WAEC 2001

Which of the following decreases when a given mass of gas is compressed to half its initial volume?

A. Average intermolecular distance
B. Frequency of collisions
C. Number of molecules present
D. Atomic radius of each particle