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