Post Utme Chemistry Past Questions and Answers

Question 581:

A polymerization reaction is one in which ____________

A. Small molecules form giant molecules
B. Atoms form molecules
C. Giant molecules form small molecules
D. Molecules form volatile compounds

Question 582:

28.8cm³ of nitrogen at 15^oC is cooled to 0^oC at constant pressure.
The new volume of nitrogen is ____________

A. 147cm³
B. 14.7cm3
C. 27cm3
D. 31.7cm3

Question 583:

The electron configuration of elements X and Y are = 2,8,6, Y = 12,8,7.
The bond in the compound formed of X and Y is expected to be ____________

A. Ionic
B. Covalent
C. Dative covalent
D. Metallic

Question 584:

Pure sulphuric acid is a liquid of 34 density. What volume of it would be required to prepared 250cm³ of 0.2M solution?
H =1 S=32, O=16

A. 2.00cm3
B. 2.666cm3
C. 3.00cm3
D. 3.6cm3

Question 585:

What mass of sodium carbonate is 500cm³ of 0.1 mole of sodium carbonate solution
(Na=23, C=12, O=16)

A. 106g
B. 59g
C. 99g
D. 10g
E. 20g