1 Which salt is used in making soap? A Sodium hydroxide B Sodium carbonate C Sodium chloride D Calcium carbonate
2 Which salt is used to control algae in ponds? A Sodium chloride B Copper sulfate C Ammonium nitrate D Sodium carbonate
4 Which oxide is basic in nature? A Carbon dioxide B Sulphur trioxide C Calcium oxide D Nitrogen dioxide
5 Acid rain mainly damages: A Plastic materials B Forests and buildings C Glass objects D Metals only
6 Which factor is least important for solid-solid reactions? A Surface area B Temperature C Concentration D Catalyst
7 What is a salt in chemistry? A An acid only B A base only C Product of acid and base neutralization D An element
8 Which salt is used as preservative in food? A Sodium chloride B Copper sulfate C Silver nitrate D Potassium permanganate
9 Which salt is formed when hydrochloric acid reacts with sodium hydroxide? A Sodium sulfate B Sodium nitrate C Sodium chloride D Sodium carbonate
10 What is the IUPAC name of CH3COOH? A Ethanoic acid B Methanoic acid C Propanoic acid D Butanoic acid
11 Chemical kinetics helps in food preservation by: A Speeding up spoilage B Slowing down reactions C Changing nutrients D Adding colors
13 Enzymes are best described as: A Inorganic catalysts B Synthetic chemicals C Biological catalysts D Reactants
14 Which salt is used in making plaster of Paris? A Calcium sulfate B Calcium carbonate C Sodium sulfate D Magnesium sulfate
16 Which of the following is an acidic salt? A Sodium chloride B Ammonium chloride C Sodium carbonate D Potassium nitrate
19 Which salt is colorless and crystalline? A Copper sulfate B Iron sulfate C Sodium chloride D Potassium permanganate
20 A reaction with high activation energy is: A Very fast B Very slow C Instantaneous D Independent of temperature
21 Which oxide reacts with sodium hydroxide? A Sulphur dioxide B Zinc oxide C Magnesium oxide D Calcium oxide