Jamb Chemistry Past Questions and Answers

Question 2016:

• JAMB 2018

The knowledge of half-life can be used to

A. Create an element
B. Detect an element
C. Split an element
D. Irradiate an element

Question 2017:

• JAMB 2018

An element X forms the following compounds with chlorine; XCl\(_4\), XCl\(_3\), XCl\(_2\). This illustrates the

A. Law of multiple proportions
B. Law of chemical proportions
C. Law of simple proportions
D. Law of conservation of mass

Question 2018:

• JAMB 2018

The hydrogen ion concentration of a sample of orange juice is 2.0 X 10\(^{-11}\)moldm\(^{-3}\). What is its p\(^{OH}\)? [log102 = 0.3010]

A. 3.30
B. 13.00
C. 10.70
D. 11.30

Question 2019:

• JAMB 2018

From the graph above, it may be concluded that

A. AgNO\(_3\) is probably not soluble at 1100
B. NaCl is insoluble in water
C. Pb(NO\(_3\))\(_2\) is more soluble than KCIO\(_3\)
D. The solubility of KCIO\(_3\) exceeds that of NaCl at all temperature

Question 2020:

• JAMB 2018

2SO\(_2\) \(_{(g) }\)+ O\(_2\) \(_{(g) }\) ↔ 2SO\(_3\)\(_{(g) }\) ΔH = -395.7kJmol\(^{-1}\)
In the equation, an increase in temperature will shift the equilibrium position to the

A. Left and equilibrium constant decreases
B. Left and equilibrium constant increases
C. Right and equilibrium constant increases
D. Right and equilibrium constant decreases