Jamb Chemistry Past Questions and Answers

Question 2026:

• JAMB 2018

The conductivity of an acid solution depends on the

A. Amount of ions present and their mobilities
B. Mobilities of the ions present
C. Amount of ions present
D. Temperature of the solution

Question 2027:

• JAMB 2018

Which of the following metals cannot replace hydrogen from water or steam?

A. Sodium
B. Magnesium
C. Iron
D. Copper

Question 2028:

• JAMB 2018

Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

A. P will form an electrovalent bond with R
B. Q will form a covalent bond with S
C. R will form an electrovalent bond with S
D. Q will form an electrovalent bond with S

Question 2029:

• JAMB 2018

During the electrolysis of copper II sulphate between platinum electrodes, if litmus solution is added to the anode compartment

A. The litmus turns blue but no gas is evolved
B. The litmus turns blue and oxygen is evolved
C. The litmus turns blue and hydrogen is evolved
D. The litmus turns red and oxygen is evolved

Question 2030:

• JAMB 2018

The derivative of benzene that can be used in making explosives is

A. Aniline
B. Xylene
C. Phenol
D. Toluene