Chemical Reaction | MCQs

Explanation

• Neutralization is a chemical reaction where an acid and a base combine to form a neutral solution, neither acidic nor basic, with a pH of 7.
• This process is commonly seen in reactions between strong acids and strong bases, resulting in the formation of a salt and water.

Explanation

• A base is a substance that produces hydroxide ions (OH-) in an aqueous solution, making the solution basic.
• Examples of bases include sodium hydroxide (NaOH), calcium hydroxide (Ca(OH)2), and ammonium hydroxide (NH4OH).

Explanation

• Hydrogen and Oxygen combining to form water, which is an example of a synthesis reaction: 2H2 + O2 → 2H2O
• In this reaction, two substances (hydrogen and oxygen) combine to form a new compound (water).

Explanation

• The formation of hydrogen and oxygen from water, which is an example of a decomposition reaction: 2H2O → 2H2 + O2
• In this reaction, water (H2O) decomposes into hydrogen (H2) and oxygen (O2).

Explanation

• A Decomposition Reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances.
• This is the opposite of a Combination Reaction, where two or more substances combine to form a new compound.

Explanation

The equation A+B → AB represents an addition reaction, where two substances (A and B) combine to form a new compound (AB).

Explanation

• The given reaction, CaO + CO2 → CaCO2, is an example of a Combination Reaction, also known as a Synthesis Reaction or Addition Reaction.
• In this reaction, two substances, calcium oxide (CaO) and carbon dioxide (CO2), combine to form a single compound, calcium carbonate (CaCO2).

Explanation

• An Addition Reaction is a type of chemical reaction where two or more substances combine to form a new, single compound.
• This type of reaction involves the formation of a new chemical bond, resulting in a single product with a unique identity.

Explanation

The statement "Total mass of the reactants and products will remain conserved during a chemical reaction" is called the Law of Conservation of Mass.

Explanation

• The products in the reaction are Carbon dioxide (CO2) and Water (H2O).
• These products are formed through the combustion of Methane (CH4) and Oxygen (O2), releasing energy in the process.