Chemistry
Identify the gas evolved in each of the following reactions:
(a) Methane undergoes complete combustion.
(b) Copper carbonate is heated.
(c) MnO2 reacts with concentrated HCl.
Related Questions
Differentiate between the following pairs based on the criteria given:
(a) Sulphuric acid and Nitric acid (using barium chloride solution)
(b) Unsaturated and Saturated hydrocarbons (type of bond present)
Calcium carbonate reacts with dilute hydrochloric acid as given below:
CaCO3 + 2HCl ⟶ CaCl2 + H2O + CO2
(a) What is the mass of 5 moles of calcium carbonate? (Relative molecular mass of calcium carbonate is 100)
(b) How many moles of HCl will react with 5 moles of calcium carbonate?
(c) What is the volume of carbon dioxide liberated at S.T.P. at the same time?
X - HCl ⇋ H1+ + Cl- (in solution state)
Y - PbBr2 ⇋ Pb2+ + 2Br1- (in molten state)
From the above reactions X or Y, identify the reaction which exhibits:
(a) electrolytic dissociation
(b) ionization
Give reasons for the following:
(a) Inert gases do not form ions.
(b) Covalent compounds have a low melting and boiling point.