Chemistry Quiz for Grade 12 Students

What is a chemical reaction?

• D. A process where atoms rearrange to form new substances

• A. A physical change that creates a new substance

• B. A process where atoms are destroyed

• C. A process where reactants do not interact

What are the atoms and molecules that interact with each other in a chemical reaction called?

• C. Elements

• B. Reactants

• D. Compounds

• A. Products

What is stoichiometry in chemistry?

• A. The study of chemical equations

• B. The study of atomic structure

• C. The study of chemical bonding

• D. The study of reactants and products in a chemical reaction

Which law states that mass cannot be created nor destroyed?

• B. Law of Multiple Proportions

• C. Law of Conservation of Mass

• D. Law of Chemical Equations

• A. Law of Definite Proportion

What is the correct order of products obtained in fractional distillation of petroleum from top to bottom?

• D. Petrol, Diesel, Kerosene, Petroleum gas

• A. Petroleum gas, Petrol, Kerosene, Diesel

• B. Diesel, Kerosene, Petrol, Petroleum gas

• C. Kerosene, Diesel, Petrol, Petroleum gas

Which of the following is not obtained as a fraction during the refining of petroleum?

• A. Kerosene

• D. Bitumen

• B. Natural gas

• C. Lubricating oil

Which fraction of petroleum has the lowest boiling point?

• C. Kerosene

• B. Gasoline

• D. Petroleum gas

• A. Heavy oil

Which product of petroleum is used to drive heavy vehicles like trucks?

• C. Diesel

• A. Petrol

• B. Kerosene

• D. Petroleum gas

Which of the following is the most environment friendly fuel to be used in automobiles?

• A. Petrol

• B. Diesel

• C. Natural gas

• D. Petroleum gas

Which compounds are aromatic?

• D. 2 and 3

• B. 2 and 4

• A. 1 and 3

• C. 1 and 4