Jamb Chemistry 2015 Past Questions and Answers

Question 46:

• JAMB 2015

The furring of kettles is caused by the presence in the water of

A. Calcium tetraoxosulphate (IV)
B. Calcium hydrogentrionocarbonate (IV)
C. Calcium hydroxide
D. Calcium trioxocarbonate (IV)

Question 47:

• JAMB 2015

A difference between chemical and physical change is that in a chemical change

A. Oxygen is consumed
B. Heat is supplied
C. The reversible process occurs
D. A new substance is formed

Question 48:

• JAMB 2015

According to the kinetic theory an absence in temperature causes the kinetic energy of particles to

A. Decrease
B. Increase
C. Remain constant
D. Be zero

Question 49:

• JAMB 2015

PCL5(g)= PCL3(g) + Cl2(g)
In the reaction above, a decrease in pressure will

A. Decelerate the reaction
B. Increase yield of Pcl3
C. Increase the yield of Pcl5
D. Accurate the reaction

Question 50:

• JAMB 2015

Which of the following gives a precipitation when treated with NaOH Solution?

A. AlCl₃
B. NH₄Cl
C. Na₂CO₃
D. CH₃COONa