Physics & Chemistry Basics Quiz

Q1.The SI unit of force is:

A. Joule B. Watt C. Newton D. Pascal

Q2.Sound travels fastest in:

A. Vacuum B. Air C. Water D. Steel

Q3.The chemical formula of baking soda is:

A. NaCl B. NaHCO₃ C. Na₂CO₃ D. CaCO₃

Q4.The pH of pure water is:

A. 0 B. 5 C. 7 D. 14

Q5.Which metal is liquid at room temperature?

A. Lead B. Zinc C. Mercury D. Tin

Q6.The mirror used as a rear-view mirror in vehicles is:

A. Plane mirror B. Concave mirror C. Convex mirror D. Parabolic mirror

Q7.The most abundant element in the Earth's crust is:

A. Silicon B. Iron C. Oxygen D. Aluminium

Q8.Ohm's Law states that:

A. V = IR B. F = ma C. E = mc² D. P = VI

Q9.The human hearing range is:

A. 1-100 Hz B. 20-20,000 Hz C. 100-50,000 Hz D. 500-100,000 Hz

Q10.The hardest natural substance is:

A. Gold B. Iron C. Diamond D. Platinum

Q11.Rusting of iron is a process of:

A. Reduction B. Oxidation C. Sublimation D. Fermentation

Q12.Dry ice is the solid form of:

A. Oxygen B. Nitrogen C. Carbon Dioxide D. Water

Q13.The gas used in fire extinguishers is:

A. Oxygen B. Hydrogen C. Carbon Dioxide D. Nitrogen

Q14.The speed of light in vacuum is approximately:

A. 3 × 10⁶ m/s B. 3 × 10⁸ m/s C. 3 × 10¹⁰ m/s D. 3 × 10⁴ m/s

Q15.Laughing gas is:

A. Carbon Monoxide (CO) B. Nitrous Oxide (N₂O) C. Carbon Dioxide (CO₂) D. Nitric Oxide (NO)

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