2 What is meant by the rate of a chemical reaction? A Amount of catalyst used B Time taken for completion C Change in concentration per unit time D Temperature of reaction
3 Which salt is prepared by direct combination? A Sodium chloride B Calcium carbonate C Sodium hydroxide D Ammonium chloride
6 Reaction kinetics mainly deals with: A Amount of reactants B Speed of reactions C Color of products D Mass of products
8 Milk turning into yogurt is an example of: A Physical change B Enzyme catalyzed reaction C Diffusion D Evaporation
9 Which salt is insoluble in cold water but soluble in hot water? A Sodium chloride B Potassium nitrate C Silver chloride D Barium sulfate
11 Which salt is used in making plaster of Paris? A Calcium sulfate B Calcium carbonate C Sodium sulfate D Magnesium sulfate
12 Which salt is used in food preservation? A Copper sulfate B Sodium chloride C Ammonium nitrate D Potassium permanganate
14 Enzymes are specific because: A They work for all reactions B They work for specific substrates C They are inorganic D They are consumed
15 Which salt is used in electroplating? A Copper sulfate B Sodium chloride C Calcium carbonate D Potassium nitrate
18 Which salt conducts electricity in molten state? A Covalent salt B Ionic salt C Organic salt D Neutral compound
19 Which substance speeds up a reaction without being consumed? A Reactant B Product C Catalyst D Solvent
20 Which salt is commonly used as a fertilizer? A Sodium chloride B Ammonium nitrate C Copper sulfate D Sodium carbonate