Waec Chemistry Past Questions For Year 2014
Question 6
The two elements 11X and 19Y are in the same group because they have the same
- A. valence electrons
- B. ionization energy
- C. number of shell
- D. atomic size
Question 7
Hydrogen bonds are formed between molecules containing a hydrogen atom bonded to a
- A. strongly electronegative atom
- B. non-polar species
- C. diatomic element
- D. complex ion
Question 8
How many lone pair (s) of electrons is present in HF?
- A. o
- B. 1
- C. 2
- D. 3
Question 9
NH4- is formed from NH3 and H- by
- A. covalent bonding
- B. dative bonding
- C. hydrogen bonding
- D. ionic bonding
Question 10
The relative atomic mass of chlorine is not a whole number because
- A. it is the weighted average mass of all its various isotopes
- B. it is the average mass of all the isotopes of the element
- C. the element has strong oxidizing ability
- D. the atom contains a higher number of neutrons than protons
