Jamb Chemistry 2019 Past Questions and Answers

Question 71:

• JAMB 2019

A synthetic rubber is not obtained from the polymerization of?

A. Neoprene
B. Isoprene
C. Butandiene
D. Hexane

Question 72:

• JAMB 2019

Burning magnesium ribbon in air removes which of the following
(i) oxygen (ii) nitrogen (iii) argon and (iv) carbon(iv)oxide?

A. I and iv only
B. I, ii, iii and iv only
C. I only
D. I and ii only

Question 73:

• JAMB 2019

Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with

A. Pb
B. Zn
C. Ca
D. Na

Question 74:

• JAMB 2019

Which of the following metals is the most essential in the regulation of blood volume, blood pressure and osmotic equilibrium?

A. Zinc
B. Manganese
C. Sodium
D. Iron

Question 75:

• JAMB 2019

Which of the following alkaline metals react more quickly spontaneously with water?

A. Calcium
B. Beryllium
C. Magnesium
D. Strontium