Write equations for the following reactions :
(i) Zinc blende is heated in air
(ii) Zinc carbonate is heated in the absence of air
(iii) Mangnese dioxide is heated with aluminium powder

Write chemical equations for the following reactions: (i) Calcium metal reacts with water. (ii) Cinnabar is heated in the presence of air. (iii) Manganese dioxide is heated with aluminium powder. (b) What are alloys? List two properties of alloys.

What reaction takes place when manganese dioxide is heated with aluminium powder ?

Write balanced equations for the sfollowing reactions: Lead sulphide is heating in air.

Write chemical equations for the following reactions: Cinnabar is heated in the presence of air. Manganese dioxide is heated with aluminium powder.

Write balanced chemical equations for the following reaction Cinnabar is heated in the air.

In calcination, ore is heated strongly in the absence of air

Write the balanced equation for the following ractions. (i) SnO is treated with dilute HNO_(3) (ii) Tin is heated with excessof chlorine gas (iii) Lead sulphide is heated in air.

Write balanced chemical equations for the following reaction Zinc carbonate is calcined