End of year quiz

IS MATTER AROUND US PURE: How can you separate a mixture of sand and water?

• Magnetic separation

• Filtration

• Evaporation

• Decantation

ATOMS AND MOLECULES: How many atoms are present in a molecule of water?

• 5

• 10

• 3

• 1

ATOMS AND MOLECULES: Define the term 'valency' of an element.

• Combining capacity of an atom

• The boiling point of an element

• The atomic weight of an element

• The color of an element

STRUCTURE OF ATOM: What are the subatomic particles present in an atom?

• Protons, Neutrons, and Positrons

• Photons, Neutrons, and Electrons

• Protons, Neutrons, and Electrons

• Protons, Electrons, and Quarks

the compound CuO is ​ ​ (a)   ​ (b)  

• copper
• oxide
• cuprium
• oxalate
• oxigenate
• cesium

Identify the glass ware

d

a

b

c

conical flask

beaker

filter paper

filter funnel

What is the purpose of the following equipment?

• to transfer solids from one container to another

• to fill a conical flask with fluid

• to filter a solution

• to distil a solution

A student was measuring the temperature of a reaction every minute. Label the graph that they obtained

b

c

d

a

Change in temperture over time

temperature (C)

initial temperature

time (minute)

zinc + ​ ​ (a)   --->​ (b)   +​ (c)  

• copper sulfate
• zinc sulfate
• copper metal
• hydrochloric acid
• sodium hydroxide
• uranium
• oxygen

Match the following tests for each gas

• oxygen

• supports burning

• hydrogen gas

• limewater test

• carbon dioxide

• pop test