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Chemistry

Chemistry · Quick practice · answer shown after each question

Chemistry quick practice

Question 1 of 10

Question 1 of 10

A 3d subshell can hold 10 electrons.

Question 2 of 10

Question 2 of 10

Graphite conducts electricity because it has

Question 3 of 10

Question 3 of 10

0.5 mol of solute is dissolved to make 100 cm³ of solution. What is its concentration?

Question 4 of 10

Question 4 of 10

Starch is a natural polymer of

Question 5 of 10

Question 5 of 10

Complete combustion of 1 mol of propane produces how many moles of water?

Question 6 of 10

Question 6 of 10

Powdered chalk reacts faster with acid than lumps of chalk because the powder has

Question 7 of 10

Question 7 of 10

The layer in the upper atmosphere that absorbs UV radiation is the ___ layer.

Question 8 of 10

Question 8 of 10

Oxygen is more soluble in warm water than in cold water.

Question 9 of 10

Question 9 of 10

Acidified potassium manganate(VII) turns from purple to colourless with

Question 10 of 10

Question 10 of 10

The oxidation number of chromium in K₂Cr₂O₇ is

Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.