Chemistry MCQ

Below Chemistry quiz are Multiple Choice Questions (MCQs) type Quiz. These Chemistry MCQ Questions helps you to refresh your Chemistry, you can see the correct option by clicking on it. .
  • 1. Smoke is an example of a _____ because its suspended particles are just small enough not to layer out.

    • Colloid
    • Positive
    • Suspension
    • Negative
  • 2. A sample of bismuth has a mass of 343 g and a volume of 35.0 cm3.What is the density of bismuth?

    • 0.102 g/cm3
    • 9.80 g/cm3
    • 378 g/cm3
    • 1.20 104 g/cm3
  • 3. Which of the following changes is a chemical change of matter?

    • ice melting to produce water
    • vinegar combining with baking soda to produce carbon dioxide
    • water boiling to produce water vapor
    • liquid silica solidifying to form glass
  • 4. The number of significant figures in the measurement 170.040 km is

    • Three
    • Four
    • Five
    • Six
  • 5. Which of these statements is true of the scientific method?

    • The steps may vary somewhat to suit the experiment.
    • Working scientists rarely use it.
    • Scientists must follow its steps exactly.
    • Scientists rarely publish results of experiments.
  • 6. When 2.02 X 1023 is multiplied by 3.1 X 10-31, the product is

    • 6.3 X 10-8
    • 6.3 X 108
    • 6.3 X 1054
    • 6.3 X 10-54
  • 7. On which factors the vibrational stretching frequency of diatomic molecule depend?

    • Force constant
    • Atomic population
    • Temperature
    • Magnetic field
  • 8. What is the relation between restoring force, f to the displacement q in Hooke’s law?

    • f = -kq
    • f = kq
    • f = kq2
    • f = -kq2
  • 9. What is the symbol for chlorine?

    • C
    • Ch
    • Ce
    • Cl
  • 10. Milk turning sour

    • Chemical Change
    • Physical Change 
  • 11. How many protons does Carbon have?

    • 3
    • 4
    • 5
    • 6
  • 12. Which is a chemical change?

    • Melting ice
    • A candle burning
    • Boiling water
    • frost forming inside the freezer
  • 13. Activation energy is

    • The energy to start a car
    • The energy needed to break down CO2
    • The energy needed to start a reaction
    • The energy used to digest food
  • 14. Which of the following is an example of a heterogeneous mixture?

    • tap water
    • chunky peanut butter
    • orange-colored sugar water
    • gold ring
  • 15. Why does electronegativity increase across a period?

    • Adding more energy levels makes the ve- further from the nucleus
    • There are more valence electrons in the outer shell
    • There are more protons  in the nucleus
    • There are less protons in the nucleus