Write the balanced chemical equations for the following reactions.
$(a)$ Calcium hydroxide $+$ Carbon dioxide $\rightarrow$ Calcium carbonate $+$ Water
$(b)$ Zinc $+$ Silver nitrate $\rightarrow$ zinc nitrate $+$ Silver
$(c)$ Aluminium $+$ Copper chloride $\rightarrow$ Aluminium chloride $+$ Copper
$(d)$ Barium chloride$+$ Potassium sulphate $\rightarrow$ Barium sulphate $+$ Potassium chloride
$(a)$ $Ca ( OH )_{2}+ CO _{2} \longrightarrow CaCO _{3}+ H _{2} O$
$(b)$ $Zn +2 AgNO _{3} \longrightarrow Zn \left( NO _{3}\right)_{2}+2 Ag$
$(c)$ $2 Al +3 CuCl _{2} \longrightarrow 2 AlCl _{3}+3 Cu$
$(d)$ $BaCl _{2}+ K _{2} SO _{4} \longrightarrow BaSO _{4}+2 KCl$
What does one mean by exothermic and endothermic reactions ? Give examples.
Write a balanced chemical equation with state symbols for the following reactions.
$(i)$ Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.
$(ii)$ Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.
$Fe _{2} O _{3}+2 Al \rightarrow Al _{2} O _{3}+2 Fe$
The above reaction is an example of a
Give an example of a double displacement reaction other than the one given in image.
Which of the statements about the reaction below are incorrect ?
$2 PbO _{( s )}+ C _{( s )} \longrightarrow 2 Pb _{( s )}+ CO _{2( g )}$
$(a)$ Lead is getting reduced.
$(b)$ Carbon dioxide is getting oxidised.
$(c)$ Carbon is getting oxidised.
$(d)$ Lead oxide is getting reduced.