Positive and Negative Catalysts

Q.

Why ${\mathrm{AlCl}}_3$ Anhydrous is used as a catalyst?

Q.

The catalyst used in the industrial preparation of sulphuric acid is

1. Manganese dioxide
2. Phosphoric acid
3. Vanadium pentoxide
4. Iron

Q.

The compound/compounds which acts as a positive catalyst is/are

1. Manganese dioxide

2. Iron

3. Phosphoric acid

4. Vanadium pentoxide

Q.

In which process is iron used as a catalyst?

1. The Haber process for the manufacture of Ammonia.

2. The Bosch process for the manufacture of Hydrogen.

3. The Contact process for the manufacture of Sulphuric Acid.

4. The Ostwalds process for the manufacture of Nitric Acid.

Q.

Name the catalyst which helps in the conversion of sulphur dioxide to sulphur trioxide?

Q.

The rate of oxidation of chloroform decreases in the presence of alcohol. Alcohol is a/an ___ for this reaction.

1. Negative Catalyst

2. Positive Catalyst

3. Electrolyte

4. Solvent

Q.

A negative catalyst, like iron, decreases the rate of the reaction.

1. True

2. False

Q.

Name the catalyst used in Habers process.

Q. Vinegar slows down the rate of food spoilage and hence it acts as a ____.

1. negative catalyst
2. positive catalyst
3. product
4. reactant

Q.

What happens when

Mercuric chloride reacts with pottasium iodide

Q. A catalyst which increases the rate of reaction is called ______.

1. auto-catalyst
2. negative catalyst
3. positive catalyst
4. bio-catalyst

Q.

The second step in the production of sulphuric acid is given by the equation:

2SO₂(g) + O₂(g) → 2SO₃(g)

Which conditions would increase the yield of this reaction?

1. High temperature, high pressure

2. Low temperature, low pressure

3. High temperature, low pressure
4. Low temperature, high pressure.

Q.

Phosphoric acid is a type of

1. negative catalyst

2. biological catalyst

3. positive catalyst

4. non- catalyst

Q. The rate of reaction can be increased by:

1. increasing the amount of negative catalyst
2. decreasing the surface area exposed to the reactant
3. increasing the concentration of the reactant
4. decreasing the temperature of the reaction