- 1. 1. The minimum amount of energy required for a chemical reaction to occur is known as the ----------
A) Activation energy
B) Energy of formation
C) Energy of reaction
D) Free energy
- 2. 2. The collision theory proposes that :
A) Reactant must collide with a certain amount of energy to form products
B) All collisions of reactants are effective
C) Reactants collide more frequently to bring about a reduction in the rate of reaction
D) The fewer the collision the faster the rate of chemical reaction rate
- 3. 3. If the rate depends on the square of the concentration of "A" , then it is referred to as --------
A) Second order reaction
B) First order reaction
C) Fourth order reaction
D) Zero order reaction
- 4. 4. If the rate of reaction is proportional to the concentration of a reactant "A", then the reaction is a ----------
A) Second order reaction
B) First order reaction
C) Zero order reaction
D) Fourth order reaction
- 5. 5. When the concentration of the reactant does not affect the rate of reaction, it is referred to as --------
A) Fourth order reaction
B) Zero order reaction
C) Second order reaction
D) First order reaction
- 6. 6. The sum of the powers of the concentration of the reactants which appear in the rate equation is known as -----
A) Molecularity
B) Reaction mechanism
C) Collision
D) Order reaction
- 7. 7. The number of molecules , atoms, radicals or ions taking part in the rate determining step is known as ---------
A) Molecularity
B) Rate determining step
C) Reaction mechanism
D) Rate of reaction
- 8. 8. The type of reaction where the reactant particles absorb light energy and react rapidly in a series of chain reactions is referred to as ------
A) Photochemical reaction
B) Rate of reaction
C) Order of reaction
D) Collision
- 9. 9. A substance which alters the rate of chemical reaction but remains chemically unchanged at the end of the reaction is called -------
A) Enthalpy
B) Activation energy
C) Catalyst
D) Energetics
- 10. 10. The graphical representation of the energy changes in the course of a chemical reaction is known as -------------
A) Energy barrier
B) Rate curve
C) Reaction profile
D) Activated complex
- 11. 11. Faraday's first law of electrolysis can be expressed mathematically as
A) Q =It
B) M =EIt
C) Q = EIt
D) M =E¹It
- 12. 12. One of the following cells is a simple electrochemical cell widely used to generate small currents of electricity for everyday purposes and industrial operations.
A) Cathodic discharger
B) Leclanche cell
C) Avogadro's cell
D) Lead acid accumulator
- 13. 13. -------- is the potential difference set up between an element and a solution of its ions.
A) Electrolysis
B) Electroplating
C) Electrolyte
D) Electrode potential
- 14. 14. The chemical decomposition of compounds which takes place when an electric current is passed through either a solution or the molten form of the compound is known as --------
A) Electromotive force
B) Electrolysis
C) Potential difference
D) Electrode potential
- 15. 15. ------- is the positive electrode by which current enters the electrolyte or by which electrons leave the electrolyte.
A) Electrode
B) Electrolytic cell
C) Anode
D) Cathode
- 16. 16. ------- is the negative electrode by which current enters the electrolyte or by which electrons leave the electrolyte.
A) Electrolytic cell
B) Anode
C) Cathode
D) Electroplate
- 17. 17. The container of electrolyte with two electrodes connected to a suitable direct current supply is called ---------
A) Electrodes
B) Glass Jar
C) Electrolytic cell
D) Electroplates
- 18. 18. One of the following is not a use of electrolysis.
A) Industrial preparation of NaOH
B) Purification of metals
C) Extraction of metals
D) Diffusion of chemicals
- 19. 19. The Micheal Faraday's constant is ------------
A) 9650000 coulombs
B) 9650 coulombs
C) 96500 coulombs
D) 965000 coulombs
- 20. 20. In electrochemical cells, ---------- occurs at the anode.
A) Reduction
B) Oxidation
C) Electrode potential
D) Electromotive force
|