Jamb Chemistry 2015 Past Questions and Answers

Question 6:

• JAMB 2015

The gas that is most useful in protecting humans against solar marathon is

A. Chlorine
B. Ozone
C. Carbon IV oxide
D. Hydrogen sulphur

Question 7:

• JAMB 2015

Vulcanization involve the removal of

A. Monometer
B. The single bond
C. The double bond
D. A polymer

Question 8:

• JAMB 2015

The acid in electrolysis of water is dilute

A. HNO₃
B. CH₃COOH
C. H₂SO[sub][/sub]
D. HCl

Question 9:

• JAMB 2015

A small quantity of solid ammonium chloride (NH4Cl) texted gently in a test tube, the solid gradually disappear produce two gases. Later, a white cloudy deposit was absence on the cooler part of the test tube. The ammonium chloride is to have undergo

A. Distillation
B. Sublimation
C. Precipitation
D. Evaporation

Question 10:

• JAMB 2015

When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be

A. Efflorescence
B. Déliquescence
C. Effervescence
D. Fluorescence