Chemistry
Thermal decomposition of sodium carbonate will produce
(i) carbon dioxide
(ii) oxygen
(iii) sodium hydroxide
(iv) no other product
Related Questions
A reaction of a type: AB + CD ⟶ AD + CB, involves
(i) no chemical change
(ii) decomposition of AB and CD
(iii) exchange of ions of AB and CD
(iv) combination of AB and CD
The reaction:
BaCl2 (aq) + H2SO4 (aq) ⟶ BaSO4 (s) + 2HCl (aq) is
(i) displacement reaction
(ii) neutralisation reaction
(iii) decomposition reaction
(iv) double displacement reaction
Complete the following statements.
(a) The chemical change involving iron and hydrochloric acid illustrates a …………… reaction.
(b) In the type of reaction called …………… two compounds exchange their positive and negative radicals.
(c) A catalyst either …………… or …………… the rate of a chemical change but itself remains …………… at the end of the reaction.
(d) On heating, hydrated copper sulphate changes its colour from …………… to ……………
Match the following :
