G10-Chem-9

What is a complete reaction?

• a) A reaction in which all reactants have been converted into products.
• b) A reaction in which some reactants have been converted into products.
• c) A reaction in which no reactants have been converted into products.

Why do most chemical reactions not go to completion?

• a) Products react themselves to form the reactants.
• b) Reactants react themselves to form the products.
• c) Products and reactants remain unchanged.

What are reversible reactions?

• a) Reactions in which the products do not recombine to form reactants.
• b) Reactions in which the products can recombine to form reactants.
• c) Reactions in which the products are always formed.

How are reversible reactions represented?

• a) By a single arrow between reactants and products.
• b) By a double arrow between reactants and products.
• c) By a triple arrow between reactants and products.

What is a dynamic equilibrium?

• a) A state in which the reaction has stopped.
• b) A state in which the forward and reverse reactions take place at equal rates.
• c) A state in which only the forward reaction takes place.

What is an irreversible reaction?

• a) A reaction in which the products do not recombine to form reactants.
• b) A reaction in which the products can recombine to form reactants.
• c) A reaction in which the products are always formed.

What is a forward reaction?

• a) A reaction in which the products can recombine to form reactants.
• b) A reaction in which only the forward reaction takes place.
• c) A reaction in which the reactants form the products.

What is a reverse reaction?

• a) A reaction in which the products can recombine to form reactants.
• b) A reaction in which only the forward reaction takes place.
• c) A reaction in which the products break down into the reactants.

What is a closed flask?

• a) A flask with a lid that can be opened and closed.
• b) A flask that cannot be opened or closed.
• c) A flask that is always open.

What is a reversible reaction?

• a) A reaction that can only proceed in the forward direction.
• b) A reaction that can only proceed in the reverse direction.
• c) A reaction that can proceed in both forward and reverse directions.