WorksheetsCHEMISTRY HBEL 9
Total questions: 15
Worksheet time: 8mins
The property of being drawn into a wire is called:
Brittleness
Ductility
Hardness
Flexibility
Which of the following is a mixture and not a pure metal?
Zinc
Bronze
Iron
Tin
The main ore of iron is:
Galena
Cassiterite
Hematite
Bauxite
The process used to extract tin from its ore involves:
Electrolysis
Roasting and smelting
Fractional distillation
Filtration and crystallization
Steel is an alloy of:
Iron and tin
Iron and carbon
Tin and copper
Iron and zinc
The main reason for adding carbon to iron is to:
Reduce its hardness
Prevent rusting
Increase strength and hardness
Make it magnetic
Which of the following is most likely a physical property of a metal?
Reacts with acid to form salt
Melts at high temperature
Forms oxide that is acidic
Burns to form carbon dioxide
When a metal is hammered into thin sheets, this shows it is:
Brittle
Ductile
Malleable
Conductive
Which of the following best differentiates metals from non-metals?
Metals are poor conductors of heat
Metals are non-sonorous
Non-metals are dull and brittle
Non-metals form basic oxides
Which statement is true about non-metals?
They are mostly solids with metallic luster
They conduct electricity like copper
They tend to gain electrons during reactions
They are ductile and sonorous
Beta radiation can be stopped by:
A sheet of paper
Thick lead
Aluminum sheet
Air
Gamma rays are:
Least penetrating
Most penetrating
Positively charged
Heavy particles
Which of the following statements is true about natural radioactivity?
It occurs only in laboratories
It happens spontaneously in unstable nuclei
It is man-made
It requires high temperature
Artificial radioactivity is produced by:
Cooling isotopes
Bombarding nuclei with particles
Mixing metals
Rusting of metals
The radiation that causes the most ionization is:
Alpha
Beta
Gamma
Neutron
