Waec Chemistry 1997 Past Questions and Answers

Question 41:

• WAEC 1997

If an element R belongs to the same group as sodium, an aqueous solution of ROH will

A. Be neutral
B. Be acidic
C. Be coloured
D. Have pH greater than 7
E. Turn back litmus red

Question 42:

• WAEC 1997

Element X, with electronic configuration 2, 8, 2 and element Y with electronic configuration 2, 8, 7 are like to combine by

A. Metallic bonding
B. Covalent bonding
C. Electrovalent bonding
D. Dative bonding
E. Hydrogen bonding

Question 43:

• WAEC 1997

The valence electrons of element ₁₂Mg are in the

A. 1s orbital
B. 2s orbital
C. 2p_x orbital
D. 2p_y orbital
E. 3s orbital

Question 44:

• WAEC 1997

Which of the following statements is correct about sodium chloride in the solid state?

A. It exists as aggregates of ions
B. It conducts electricity
C. Its melting point is below 100^oC
D. It exists as discrete molecules
E. Its ions are linked by metallic bonds

Question 45:

• WAEC 1997

Which of the following Group 1 elements has the highest ionization energy?

A. ₅₅Cs
B. ₃₇Rb
C. ₁₉K
D. ₁₁Na
E. ₃Li