Q.1
Alloys are mixtures of metals. Which is NOT an alloy?
  • Brass
  • Bronze
  • Chromium
  • Solder
Q.2
A pure substance has a melting point which is .......
  • Higher than its freezing point
  • Lower than its boiling point
  • The same as its boiling point
  • The same as its freezing point
Q.3
Air is a mixture of different gasses. Which list consists of gasses present in the air?
  • Hydrogen, oxygen, carbon dioxide
  • Nitrogen, hydrogen, carbon dioxide
  • Nitrogen, oxygen, carbon dioxide
  • Nitrogen, oxygen, hydrogen
Q.4
Which of these substances is a mixture?
  • Oxygen
  • Salt
  • Sea water
  • Water
Q.5
How would you separate a mixture of iron filings and sulfur?
  • Filter
  • Use a magnet
  • Use a sieve
  • Use tweezers
Q.6
The name given to the liquid which dissolves the solid in a solution is .......
  • Distillate
  • Saturated
  • Soluble
  • Solvent
Q.7
Which of the following is NOT a mixture?
  • Coca cola
  • Crude oil
  • Methane
  • Milk
Q.8
The best description of a mixture is .......
  • A lot of substances jumbled together
  • One substance on its own
  • Two or more substances added together which can be easily separated
  • Two or more substances chemically joined together
Q.9
In a solution, the hotter the solvent .......
  • No more of the soluble solid dissolves
  • The less the solute dissolves
  • The quicker the soluble solid dissolves
  • The slower the solute dissolves
Q.10
The method used to separate colored dyes in ink is .......
  • Chromatography
  • Distillation
  • Evaporation
  • Filtration
0 h : 0 m : 1 s