Neco Chemistry Past Questions and Answers

Question 141:

• NECO 2009

How many atoms of chlorine are required to saturate the double bonds of a compound containing a triene?

A. 2
B. 3
C. 4
D. 5
E. 6

Question 142:

• NECO 2009

Which of the following gases is absorbed from the air dun photosynthesis?

A. Carbon (II) oxide
B. Carbon (IV) oxide
C. Nitrogen
D. Noble gases
E. Oxygen

Question 143:

• NECO 2009

X = - log₁₀ H⁺]

What does X stand for in the expression above?

A. Degree of acidity
B. Enthalpy change
C. Equilibrium constant
D. Ionic product of water
E. Solubility product

Question 144:

• NECO 2009

During the extraction of iron in the blast furnance, slag is produced using

A. Carbon
B. Crylite
C. Limestone
D. Oxygen
E. Sulphur

Question 145:

• NECO 2009

Brain tumors can be located by using an isotope of ____________

A. Carbon - 14
B. Iodine 131
C. Technetium 99
D. Uranium235
E. Uranium 238