Jamb Chemistry 2004 Past Questions and Answers

Question 11:

• JAMB 2004

²²⁶₈₈Ra → ^x₈₆Rn + α - particle
What is the value of x in the nuclear reaction above?

A. 220
B. 222
C. 226
D. 227

Question 12:

• JAMB 2004

The property of chlorine which causes hydrogen chloride to be more ionic than the chlorine molecules is its

A. Electrovalency
B. Electron affinity
C. Electropositivity
D. Electronegativity

Question 13:

• JAMB 2004

Chlorine consisting of two isotopes of mass number 35 and 37 in the ratio 3:1 has an atomic mass of 35.5. Calculate the relative abundance of the isotopes of mass number 37

A. 20
B. 25
C. 60
D. 75

Question 14:

• JAMB 2004

Which of the following mixture of gases is likely to burn in flame

A. Neon and hydrogen
B. Nitrogen and helium
C. Helium and neon
D. Neon and nitrogen

Question 15:

• JAMB 2004

Hardness of water is caused by the presence of ions of

A. Magnesium and silver
B. Cacium and magnesium
C. Sodium and potassium
D. Calcium and sodium