1 What is a salt in chemistry? A An acid only B A base only C Product of acid and base neutralization D An element
2 Which property is common in most salts? A Liquid state B Low melting point C Crystalline solid D Gaseous nature
4 For a collision to be effective, particles must have: A Large size B Same color C Sufficient energy D High density
6 Reaction kinetics mainly deals with: A Amount of reactants B Speed of reactions C Color of products D Mass of products
7 Fast reactions usually have: A High activation energy B Low activation energy C No collisions D Low temperature
8 In collision theory, proper orientation means: A Particles must collide head-on B Particles must be parallel C Particles must collide randomly D Particles must have same mass
9 Collision theory explains reaction rate in terms of: A Color change B Effective collisions C Mass of reactants D Volume change
10 Which concentration unit is affected by temperature? A Strength B Molarity C Mass percent D Mole fraction
11 Electroplating is used to: A Purify metals B Extract metals C Coat one metal with another D Produce electricity
12 Early chemists mainly worked to improve: A Daily life materials B Computer technology C Space travel D Genetics
13 Nitric acid present in acid rain is formed from: A Nitrogen monoxide B Nitrogen dioxide C Ammonia D Nitrogen gas
14 Which salt shows basic nature in water? A Ammonium chloride B Sodium acetate C Potassium nitrate D Sodium chloride
16 Which civilization made significant contributions to alchemy? A Roman B Greek C Islamic D American
17 Which salt is formed from a strong acid and strong base? A Acidic salt B Basic salt C Neutral salt D Double salt
19 Modern chemistry differs from alchemy because it is: A Secretive B Based on experiments C Based on magic D Unsystematic
20 The particles of gas move: A Very slowly B In fixed positions C Freely and randomly D Only up and down