Waec Chemistry 2018 Past Questions and Answers

Question 46:

• WAEC 2018

The atomic number of an isotope of hydrogen is equal to its mass number because it

A. Has a totally filled valence shell
B. Has a high charge to mass ratio
C. Does not contain neutrons
D. Exhibits isotopy

Question 47:

• WAEC 2018

What is the total number of shared pair of electrons in the compound above?

A. 5
B. 8
C. 10
D. 12

Question 48:

• WAEC 2018

The bonding pair of electrons in a Hydrogen Chloride molecule is pulled towards the chlorine atom because

A. Chlorine has a larger atomic size
B. Chlorine has a larger atomic mass
C. Chlorine is more electronegative
D. There is no bonding orbitals within the hydrogen atom

Question 49:

• WAEC 2018

The solubility of \(CO_{2}\) in water can be accounted for by

A. Van der Waal's forces
B. Ionic attraction
C. Dipole attraction
D. Covalent bonding

Question 50:

• WAEC 2018

Which of the following properties would not influence electrovalent bond formation?

A. Electronegativity
B. Electron Affinity
C. Ionization potential
D. Catalytic ability