Chemistry Quiz

Question 1:

Which of the following elements belongs to the halogen group?

a) Sodium (Na)
b) Chlorine (Cl)
c) Calcium (Ca)
d) Nitrogen (N)

Question 2:

The process of conversion of a solid directly into a gas without passing through the liquid state is called:

a) Sublimation
b) Evaporation
c) Condensation
d) Vaporization

Question 3:

Which of the following compounds is used in the manufacture of fertilizers and explosives?

a) Sodium chloride (NaCl)
b) Ammonium nitrate (NH4NO3)
c) Calcium carbonate (CaCO3)
c) Potassium sulfate (K2SO4)

Question 4:

The oxidation state of oxygen in most of its compounds is:

a) +2
b) -1
c) 0
d) -2

Question 5:

The process of converting vegetable oils into solid fats by the addition of hydrogen is known as:

a) Polymerization
b) Halogenation
c) Hydrogenation
d) Saponification

Question 6:

The metal used to extract copper from its ore by smelting is:

a) Iron (Fe)
b) Zinc (Zn)
c) Carbon (C)
d) Aluminum (Al)

Question 7:

The phenomenon of an atom or molecule absorbing light and then re-emitting it in all directions is called:

a) Refraction
b) Reflection
c) Diffraction
d) Scattering

Question 8:

Which of the following is an example of an exothermic reaction?

a) Photosynthesis
b) Respiration
c) Combustion
d) Decomposition

Question 9:

Which of the following is the main component of natural gas?

a) Methane (CH4)
b) Ethanol (C2H5OH)
c) Propane (C3H8)
d) Butane (C4H10)

Question 10:

The pH of a solution with a hydrogen ion concentration of 1 x 10^-6 M would be:

a) 1
b) 6
c) 8
d) 14