Waec Chemistry 2014 Past Questions and Answers

Question 6:

• WAEC 2014

Which of the following arrangements is in decreasing order of atomic radius?

A. Li>Be>C>
B. Li>B>Be>C
C. Li>Be>B>C
D. C>B>Be>Li

Question 7:

• WAEC 2014

Which of the following processes is used in food preservation in an industry?

A. Carbon dating
B. Ieeadiation of gamma rays
C. Nuclear fission
D. Nuclear fusion

Question 8:

• WAEC 2014

The electron configuration of ₂₆Fe³⁺ is

A. [Ar]4s²3d⁶
B. [AR]4s²3d³
C. [AR]4s¹3d⁴
D. [AR]4s⁰3d⁵

Question 9:

• WAEC 2014

Which of the following transition metals is not attracted to external magnetic field?

A. Cu
B. Fe
C. Ti
D. Zn

Question 10:

• WAEC 2014

An atom W has 17 electrons and 18 neutrons. Which of the following representations of the atom is correct?

A. ¹⁷₁₈W
B. ¹⁸₁₇W
C. ³⁵₁₇W
D. ³⁵₁₈W