Chemistry
(a) What is a decomposition reaction ?
(b) Decomposition reactions can occur by (i) heat (ii) electricity and (iii) sunlight.
Give two balanced reactions for each.
Related Questions
(a) What is synthesis?
(b) What kind of chemical reaction is synthesis? Support your answer with an example.
Decomposition brought about by heat is known as thermal decomposition. What is the difference between thermal dissociation and thermal decomposition?
Samples of four metals A, B, C and D are taken and were added to the following solutions one by one. The results obtained have been tabulated as follows :
Solution to which metal is added
Metal Iron (II) sulphate Copper (II) sulphate Zinc sulphate Silver nitrate A No reaction Displacement ----- ----- B Displacement ----- No reaction ----- C No reaction No reaction No reaction Displacement D No reaction No reaction No reaction No reaction Use the table given above to answer the following questions:
(a) Which is the most reactive metal ?
(b) What would you observe when B is added to solution of copper (II) sulphate ?
(c) Arrange the metals A, B, C and D in order of increasing reactivity.
(a) Define neutralization reaction with an example.
(b) Give a balanced equation for this reaction.
(c) Give three applications of neutralization reactions.