Waec Chemistry 2012 Past Questions and Answers

Question 1:

• WAEC 2012

The number of orbitals in a p-sub level of an atom is

A. 2
B. 3
C. 5
D. 6

Question 2:

• WAEC 2012

The number of orbitals in a p-sub level of an atom is

A. 2
B. 3
C. 5
D. 6

Question 3:

• WAEC 2012

Which of the following electron configurations represents that of an atom in its ground state?

A. 1s ²2s¹2p₁
B. 1s²2s²2p⁶3s¹3p¹
C. 1s²2s¹2p³
D. 1s²2s²2p⁶3s⁰

Question 4:

• WAEC 2012

Which of the following ions has an electron configuration different from the other?

A. ₁₇CI^-
B. ₈O^2-
C. ₁₂Mg²⁺
D. ₁₃AI³⁺

Question 5:

• WAEC 2012

The atomic radii of metals are usually

A. Greater than their ionic radii
B. Equal to their ionic radii
C. Less than their ionic radii
D. Less than those of non-metals in the same period