Metallic oxides of zinc, magnesium and copper were heated with the following metals. Metal Zinc Magnesium Copper Zinc oxide Magnesium oxide Copper oxide In which cases will you find displacement reactions taking place?

Based on reactivity series of metals, the displacement reaction will take place as follows: Metal Zinc Magnesium Copper Zinc oxide No reaction Displacement No reaction Metal Zinc Magnesium Copper Magnesium oxide No reaction No reaction No reaction Metal Zinc Magnesium Copper Copper oxide Displacement Displacement No reaction

Alloys are homogeneous mixture of two or more metals or metal and non-metal. Some examples of alloys are brass, bronze, etc.

Give reasons- Platinum, gold and silver are used to make jewellery.

Platinum, gold and silver are used to make jewellery because they are highly malleable and ductile as well as lustrous. Also, they are less reactive and do not corrode easily.