SKS M3 U5 quiz 2

The changes that form new substances which have completely different chemical properties and compounds is called _______

• reactants

• resultans

• Physical changes

• Chemical reaction

(Fe) iron reacts with oxygen + water to form (Fe2O3). What is (Fe2O3) ?

• rust

• iron oxide

• ammonia

• hydrochloric aid

The appearance of banana is a result of?

• chemical properties

• reactant

• physical change

• Chemical change

A substance before changing is called?

• chemical properties

• reactant

• physical change

• Chemical change

A produce substance in a chemical reaction is called ?

• product

• reactant

• physical change

• Chemical change

(N2)  reacts with  (H2 )to form (NH1). Around 80 % of ammonia is used in farm as___________

• organic fertilizer

• Fertilizer

• tools

• insecticide

Splitting water with electrolysis is to separate __________

• water and gas

• hydrogen from carbon

• hydrogen from gas (O2)

• Water and hydrogen

If CH4 +O2 is the reactant then CO2 + H2O is the______

• Product

• Reactant

• chemical change

• carbon dioxide  and water

If lead nitrate mixed with potassium iodide the result is completely different _________

• state

• red substance

• yellow substance

• in shape

If magnesium ribbon is deep into deluted hydrochloride it will react.  What changes will happened?

• it will create fizzing bubbles

• nothing will happen

• stays the same

• it will lower the temperature inside the test tube