Chemistry Chapter 12

Steel is a type of ___.

• Oxide

• Compound

• Element

• Alloy

• Salt

Wrought iron, steel and pig iron is separated based on the content of ___

• gold

• carbon

• water

• copper

Which of the following element does not form oxide easily?

• Sulphur (S)

• Gold (Au)

• Calcium (Ca)

• Iron (Fe)

• Sodium (Na)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following element exist in liquid form under normal temperature and pressure?

• Mercury (Hg)

• Zinc (Zn)

• Iron (Fe)

• Aluminium (Al)

Brass is the alloy of __ and __.

• Copper, Zinc

• Copper, Iron

• Tin, Plumbum

• Copper, Tin

Which of the following metal has the lowest boiling point?

• Iron (Fe)

• Tin (Sn)

• Zinc (Zn)

• Copper (Cu)

• Aluminium (Al)

Which of the following application of metal is incorrect?

• Pencil is made of lead

• Aluminium can be used to make cooking pot

• Copper is used as electrical conductor

• Tin can be used to make food can to prevent rusting

The air containing trace amount of __ which will cause silver become darken

• Sulphur (S)

• Hydrogen sulphide (H₂S)

• Sulphur dioxide

  (SO₂)

• Sulphuric acid

  (H₂SO₄)

Tags

NGSS.MS-PS1-2

Bronze is the alloy of copper and ___.

• Tin (Sn)

• Zinc (Zn)

• Lead (Pb)

• Aluminium (Al)

Which if the following statement is incorrect?

• Unleaded fuel can reduce lead pollution in atmosphere.

• Aluminium container cannot be used to contain acidic or alkaline substance

• Mercury exist in the form of solid at room temperature

• The oxide of aluminium can prevent the aluminium from further rusting