Chemistry Revision 2

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6

A student carries out an experiment to determine the rate of dissolving salt at different sizes. Which of the following apparatus (equipment) is essential for the experiment?

• Conical flask

• Stopwatch

• Evaporating dish

• Bunsen burner

What is the name given to the elements in

Group 1?

• Halogen

• Noble gas

• Alkaline earth metal

• Alkali metal

Write the formula for calcium chloride

• CaCl

• Ca₂Cl

• CaCl₂

• Ca₃Cl₂

What gas turns lime water milky?

• Carbon monoxide

• Hydrogen

• Carbon Dioxide

• Oxygen

How many atoms are there in this molecule?

• 2

• 3

• 4

• 5

Another word for burning in oxygen?

• igniting

• combining

• combustion

• respiration

Suggest the pH value of lemon juice?

• 1

• 3

• 7

• 10

The diagram shows the apparatus for separating soil and water. What are the labelled parts?

• A = residue, B = distillate
•  A = residue, B = filtrate
• A = filtrate, B = residue
• A = distillate, B = filtrate

An object that will dissolve in a liquid has the property called ___________________.

• solubility

• hardness

• lustre

• viscosity