Types of reactions

2KClO₃ --> 2KCl + 3O₂ is a

• Combination reaction

• Displacement reaction

• Decomposition reaction

• Double displacement reaction

Identify the type of reaction: PbCl₂ + 2AgNO₃ → Pb(NO₃)₂ + 2AgCl

• Combination/Synthesis

• Decomposition

• Displacement

• Double Displacement

What reaction has the following general formula:

A + CD --> C + AD

• Combination

• Decomposition

• Displacement

• Double Displacement

When the equation is balanced what are the correct coefficients?

• 1, 1, 2

•  1, 3, 1

• 2, 2, 3

• 2, 3, 2

What type of reaction involves a fuel being burned in the presence of oxygen in order to produce carbon dioxide and water?

• single replacement

• synthesis

• double replacement

• combustion

The colour of lead iodide is (a)  

The gas that turns acidified potassium dichromate solution green is

• H₂

• NO₂

• O₂

• SO₂

The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

• 1:1

• 2:1

• 1:2

• 4:1

When dilute HCl is added to Zn pieces taken in a test tube,

• no change take place

• the colour of solution turns yellow

• a pungent smelling gas is evolved

• bubbles of H₂ gas appears on surface of zinc pieces

We store silver chloride in dark coloured bottles because

• it is a grey solid

• undergoes redox reaction

• to avoid action by sunlight

• it is expensive