1 Chemistry helps technology by: A Stopping inventions B Providing materials and processes C Destroying resources D Ignoring science
2 Which Muslim scientist made contributions to early chemistry? A Al-Khwarizmi B Jabir bin Hayyan C Ibn Sina D Al-Biruni
3 A chemical property is observed when a substance: A Changes shape B Melts C Undergoes chemical change D Changes state
4 Chemistry is important in daily life because it helps in: A Ignoring nature B Producing useful materials C Stopping technology D Avoiding experiments
6 Inorganic chemistry mainly studies: A Carbon compounds only B Compounds of metals and non-metals C Living systems D Chemical analysis
7 Analytical chemistry is used to: A Prepare compounds B Identify substances C Manufacture plastics D Study stars
8 Biochemistry deals with the chemistry of: A Rocks and minerals B Living organisms C Industrial products D Atomic nuclei
9 Which step of scientific method comes after experiment? A Observation B Hypothesis C Conclusion D Problem
12 Which branch connects chemistry with physics? A Organic chemistry B Physical chemistry C Biochemistry D Environmental chemistry
14 What is chemistry? A Study of living organisms only B Study of matter, its properties and changes C Study of motion and force D Study of stars and planets
15 A heterogeneous mixture has: A Uniform composition B Same properties throughout C Non-uniform composition D Only liquids
16 A compound is formed by: A Physical mixing of substances B Chemical combination of elements C Heating only D Cooling only
17 Which branch is essential for food digestion studies? A Organic chemistry B Biochemistry C Physical chemistry D Nuclear chemistry
18 A scientific theory is: A A proven fact B A wild guess C An explanation based on experiments D A simple observation
21 Which of the following is an example of a colloid? A Salt solution B Sugar solution C Milk D Copper sulfate solution
22 The main aim of chemistry is to: A Change nature randomly B Understand and control matter C Avoid scientific study D Study planets
26 Solubility of gases in liquids increases with: A Increase in temperature B Decrease in pressure C Increase in pressure D Heating strongly
29 Which scientist introduced the concept of elements clearly? A Dalton B Lavoisier C Bohr D Chadwick
30 Which solution contains maximum solute at given temperature? A Dilute B Unsaturated C Saturated D Suspension