Air - Jamb Chemistry Past Questions and Answers

Question 41:

• JAMB 2014

The nitrogen obtained from air has a density higher than the one from nitrogen-containing compounds because the one from air is contaminated with

A. Water vapour
B. Oxgyen
C. Rare gases
D. Carbon (IV) oxide

Question 42:

• JAMB 2014

The gas that is removed by the water in the flask is

A. O ₂
B. SO ₂
C. HCI
D. H ₂

Question 43:

• 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 44:

• JAMB 2015

In countries where the temperature fall below 273k, salt always spilled on the ray road in order to

A. Increase the making point office
B. Increase the density of the ice
C. Make the ice impure
D. Rinse the making point of the ice

Question 45:

• JAMB 2015

Chlorine gas turns damp starch-iodide paper

A. Pink
B. Colourless
C. Red
D. Dark blue