When metal X is treated with dilute acid Y, then a gas Z is evolved which burns readily by making a little explosion.(a) Name any two metals which can behave like metal X.(b) Name any two acids which can behave like acid Y.(c) Name the gas Z.(d) Is gas Z lighter than or heavier than air?(e) Is the reaction between metal X and dilute acid Y exothermic or endothermic?(f) By taking a specific example of metal X and dilute acid Y, write a balanced chemical equation for the reaction which takes place. Also indicate the physical states of all the reactants and products
a) Two metals that can behave like metal X are Zinc (Zn) and Iron (Fe).
b) Two acids that can behave like acid Y are dilute hydrochloric acid (HCl) and dilute sulphuric acid (H2SO4).
c) The gas Z is Hydrogen (H2).
d) The gas Z (i.e hydrogen) is lighter than air, as it is the lightest element present in the periodic table.
e) The reaction between metal X and dilute acid Y is exothermic as it produces a huge amount of heat.
f) If metal X is zinc (Zn) and acid Y is dilute hydrochloric acid (HCl), then the equation can be written as:
$Zn( s) +2HCl( aq)\rightarrow ZnCl_{2}( aq) +H_{2}( g)$
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