General
✓✗A precipitate formed in a reaction is shown by
- downward arrow
- upward arrow
- sideways arrow
- none of the above
General
✓✗A white solid which is yellow when hot but changes to white again on cooling is_____
General
✓✗Pick the incorrect statement about the given reaction
- MnO2 is the oxidising agent
- MnO2 is getting reduced
- HCl is getting oxidised
- HCl is the oxidising agent
General
✓✗What would happen when zinc strips are placed in copper sulphate solution?
- blue colour of copper sulphate solution will fade
- colourless zinc sulphate will be formed
- red brown deposit of copper metal will be formed on zinc strips
- all of these
General
✓✗The process in which a new substance, with new properties is produced is called -
- Chemical reaction
- Nuclear reaction
- Physical change
- None of the above
General
✓✗A short hand representation of chemical reaction is
- symbol
- formulae
- chemical equation
- all the above
General
✓✗Which of the following reactions is an example of thermal decomposition ?
-
Calcium Carbonate Calcium Oxide Carbon dioxide -
Potassium Chlorate Potassium Chloride Oxygen -
Ferrous Sulphate Ferric Oxide Sulphur dioxide Sulphur trioxide - All of these
General
✓✗Which one of the following is an endothermic reaction?
- Combination of carbon and oxygen to form carbon monoxide
- Combination of nitrogen and oxygen to form nitrogen monoxide
- Combination of glucose and oxygen to form carbon dioxide and water
- Combination of zinc and hydrochloric acid to form zinc chloride and hydrogen
General
✓✗The correct formula for ammonium sulphate is _____
General
✓✗Which of the following is a decomposition reaction?
