- 1. 1. The minimum amount of energy required for a chemical reaction to occur is known as the ----------
A) Free energy
B) Activation energy
C) Energy of reaction
D) Energy of formation
- 2. 2. The collision theory proposes that :
A) The fewer the collision the faster the rate of chemical reaction rate
B) Reactant must collide with a certain amount of energy to form products
C) All collisions of reactants are effective
D) Reactants collide more frequently to bring about a reduction in the rate of reaction
- 3. 3. If the rate depends on the square of the concentration of "A" , then it is referred to as --------
A) Zero order reaction
B) First order reaction
C) Second order reaction
D) Fourth 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) First order reaction
C) Zero order reaction
D) Second 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) Collision
B) Reaction mechanism
C) Order reaction
D) Molecularity
- 7. 7. The number of molecules , atoms, radicals or ions taking part in the rate determining step is known as ---------
A) Reaction mechanism
B) Rate of reaction
C) Rate determining step
D) Molecularity
- 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) Collision
B) Photochemical reaction
C) Rate of reaction
D) Order of reaction
- 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) Catalyst
C) Energetics
D) Activation energy
- 10. 10. The graphical representation of the energy changes in the course of a chemical reaction is known as -------------
A) Activated complex
B) Rate curve
C) Energy barrier
D) Reaction profile
- 11. 11. Faraday's first law of electrolysis can be expressed mathematically as
A) Q =It
B) M =EIt
C) M =E¹It
D) Q = EIt
- 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) Avogadro's cell
C) Lead acid accumulator
D) Leclanche cell
- 13. 13. -------- is the potential difference set up between an element and a solution of its ions.
A) Electroplating
B) Electrolysis
C) Electrode potential
D) Electrolyte
- 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) Potential difference
B) Electrode potential
C) Electromotive force
D) Electrolysis
- 15. 15. ------- is the positive electrode by which current enters the electrolyte or by which electrons leave the electrolyte.
A) Electrode
B) Cathode
C) Anode
D) Electrolytic cell
- 16. 16. ------- is the negative electrode by which current enters the electrolyte or by which electrons leave the electrolyte.
A) Electroplate
B) Anode
C) Electrolytic cell
D) Cathode
- 17. 17. The container of electrolyte with two electrodes connected to a suitable direct current supply is called ---------
A) Electrodes
B) Electrolytic cell
C) Glass Jar
D) Electroplates
- 18. 18. One of the following is not a use of electrolysis.
A) Industrial preparation of NaOH
B) Extraction of metals
C) Purification of metals
D) Diffusion of chemicals
- 19. 19. The Micheal Faraday's constant is ------------
A) 96500 coulombs
B) 965000 coulombs
C) 9650000 coulombs
D) 9650 coulombs
- 20. 20. In electrochemical cells, ---------- occurs at the anode.
A) Electrode potential
B) Reduction
C) Electromotive force
D) Oxidation
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