Effect of Catalyst

Q.

___is used as a catalyst in the formation of Ammonia from Nitrogen and Hydrogen.

Q.

What is Gibbs free energy in electrochemistry?

Q. Which one of the following statements is not correct ?

1. Catalyst does not initiate any reaction
2. Enzymes catalyse mainly biochemical reaction
3. Coenzymes increase the catalytic activity of enzyme
4. The value of equilibrium constant is changed in the presence of a catalyst in the reaction equilibrium

Q.

How will you provide the following information in a chemical reaction?

Catalyst.

Q.

A catalyst is a substance that changes the rate of reaction without itself undergoing any chemical change.

1. True
2. False

Q.

A catalyst also undergoes changes in its chemical composition when it speeds up or slows down a reaction.

1. True

2. False

Q.

9. Which catalyst is used in the following reactions….

2H₂O₂ → 2H₂O + O₂

1. MgO₂

2. CO₂

3. MnO₂

4. O₂

Q. calculate the equilibrium constant for the reaction at 25^°C Cu(s) + 2Ag+(aq)=Cu2+(aq) + 2Ag (s) Given E^°cell =-0.46 V.

Q.

Name a substance that alters the speed of a chemical reaction but does not take part in the reaction.

Q.

What is the diffference between activity and rate of reaction .means explain difference between positive catalyst and negative catalyst

Q. At 773 K, the equilibrium constant Kp for the reaction, N2(g) + 3 H2(g) 2NH3(g) is 49. Calculate the value of Kp for the reaction, NH3(g) 1+2 N2(g) + 3+2 H2(g) at the same temperature

Q. Why does fur form inside a kettle in which water has been boiled for a long time? Give the chemical names and formulae of this fur? In what way is it a nuisance?

Q.

State true or false.

A) Changing the catalyst ca change the final product obtained in some reactions.

B) catalyst cannot change equilibrium constant of a reaction

C) lacto bacilli enzyme is responsible for curd formation from milk

D) A promotor when taken without catalyst will always increase rate of reaction.

Q.

A catalyst
(IIT-JEE, 1984)

1. Increases the average kinetic energy fo the reacting molecules.

2. Decreases the activation energy

3. Alters the reaction mechanism

4. Increases the frequency of the collisions of the reacting species

Q. What is the difference between equilibrium constant and reaction quotient?