Chemical Reactions

Front

What type of chemical reactions take place when electricity is passed through water?

Back

Decomposition

Front

Back

displacement

Front

What happens when iron nails are placed in a copper sulfate solution?

Back

the colour of solution changes to green.

Front

When a magnesium ribbon is burnt in air, the ash formed is

Back

white.

Front

Back

white

Front

What happens when carbon dioxide is passed through lime water?

Back

Front

In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. If lead nitrate is not available, which can be used instead? Options: Lead sulphate, Lead acetate, Lead carbonate, Lead chloride.

Back

Lead acetate

Front

Barium chloride reacts with ammonium sulphate to form barium sulphate and ammonium chloride. What type of reaction is this? Options: Displacement, Precipitation, Combination, Double displacement.

Back

Precipitation and Double displacement

Front

Product formed when CaO (quick lime) reacts with water?

Back

Slaked lime

Front

The reaction in which two compounds exchange their ions to form two new compounds is called

Back

double displacement reaction.