Post Utme Chemistry Past Questions and Answers

Question 776:

Which of the following metals is purified commercially by electrolysis?

A. Zn
B. Fe
C. Sn
D. Cu

Question 777:

The gas that is most useful in protecting humans against solar radiations is ____________

A. Chlorine
B. Ozone
C. Carbon (iv) oxide
D. Hydrogen sulphide

Question 778:

The type of iron that is best suited for welding, making nails, chains and iron rods is ____________

A. Pig iron
B. Wrought iron
C. Cast iron
D. Iron pyrites

Question 779:

Which of the following gases is commonly found in the atmosphere?

A. Argon
B. Xenon
C. Neon
D. Helium

Question 780:

Which of the following is alkali?

A. NaOH
B. \(NH_3\)
C. \(Mg(OH)_3\)
D. \(Ca(OH)_2\)