SSS 2 Chemistry - 3rd Assessment
  • 1. 1. The minimum amount of energy required for a chemical reaction to occur is known as the ----------
A) Free energy
B) Energy of reaction
C) Energy of formation
D) Activation energy
  • 2. 2. The collision theory proposes that :
A) Reactant must collide with a certain amount of energy to form products
B) Reactants collide more frequently to bring about a reduction in the rate of reaction
C) The fewer the collision the faster the rate of chemical reaction rate
D) All collisions of reactants are effective
  • 3. 3. If the rate depends on the square of the concentration of "A" , then it is referred to as --------
A) Fourth order reaction
B) Second order reaction
C) Zero order reaction
D) First order reaction
  • 4. 4. If the rate of reaction is proportional to the concentration of a reactant "A", then the reaction is a ----------
A) First order reaction
B) Zero order reaction
C) Fourth order reaction
D) Second order reaction
  • 5. 5. When the concentration of the reactant does not affect the rate of reaction, it is referred to as --------
A) Zero order reaction
B) Fourth order reaction
C) First 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) Reaction mechanism
B) Molecularity
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) Reaction mechanism
B) Rate determining step
C) Molecularity
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) Order of reaction
B) Collision
C) Photochemical reaction
D) Rate 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) Catalyst
B) Energetics
C) Enthalpy
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) Energy barrier
C) Rate curve
D) Reaction profile
  • 11. 11. Faraday's first law of electrolysis can be expressed mathematically as
A) M =EIt
B) M =E¹It
C) Q =It
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) Leclanche cell
B) Avogadro's cell
C) Cathodic discharger
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) Potential difference
B) Electromotive force
C) Electrode potential
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) Electrolytic cell
D) Anode
  • 16. 16. ------- is the negative electrode by which current enters the electrolyte or by which electrons leave the electrolyte.
A) Cathode
B) Anode
C) Electroplate
D) Electrolytic cell
  • 17. 17. The container of electrolyte with two electrodes connected to a suitable direct current supply is called ---------
A) Electrodes
B) Glass Jar
C) Electroplates
D) Electrolytic cell
  • 18. 18. One of the following is not a use of electrolysis.
A) Diffusion of chemicals
B) Purification of metals
C) Extraction of metals
D) Industrial preparation of NaOH
  • 19. 19. The Micheal Faraday's constant is ------------
A) 96500 coulombs
B) 9650 coulombs
C) 965000 coulombs
D) 9650000 coulombs
  • 20. 20. In electrochemical cells, ---------- occurs at the anode.
A) Electrode potential
B) Electromotive force
C) Reduction
D) Oxidation
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