Chemistry 2003 Neco Past Questions and Answers

Question 6 :

• NECO 2003

An atom of element X has an electronic configuration of \( 1s^22p^33s^23p^2. \) In which group of the periodic table is X?

A. \( \text{0} \)
B. 2
C. 3
D. 4
E. 5

Question 7 :

• NECO 2003

Which metal is a constituent of both bronze and solder?

A. Copper
B. Lead
C. Silver
D. Tin
E. Zinc

Question 8 :

• NECO 2003

What change will occur during the electrolysis of brine using carbon electrodes?

A. Chlorine will be given off at the cathode
B. Oxygen gas will be given off at the anode
C. Sodium will be deposited at the cathode
D. The resulting solution, after electrolysis, will be acidic.
E. The volumes of hydrogen and chlorine given off during the same time are equal

Question 9 :

• NECO 2003

Which metal bromide is widely used in photography?

A. Calcium bromide
B. Magnesium bromide
C. Potassium bromide
D. Silver bromide
E. Sodium bromide

Question 10 :

• NECO 2003

How many Faradays of electricity are required to liberate 9g of aluminium? [Al = 27]

A. 0.1
B. 0.3
C. 1
D. 2.7
E. 3