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CHEMISTRY IN SOCIETY: Fertilizers
ENVIRONMENTAL EDUCATION: Chemistry In Society - Extraction Of Metals
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Alkali metals and alkaline earth metals
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Identification Of Ions
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Salts
MATTER - PROPERTIES AND TRANSFORMATION: Chemistry Of Elements - Transition metals
MATTER - PROPERTIES AND TRANSFORMATION: Principles Of Chemistry - Formulae, Moles And Equations
MATTER: PROPERTIES AND TRANSFORMATION: Rates Of Reaction
MATTER: PROPERTIES AND TRANSFORMATION: Reversible Reactions
PRINCIPLES OF CHEMISTRY: Electrochemistry
PRINCIPLES OF CHEMISTRY: Gaseous State
5/35 MCQs for:
MATTER: PROPERTIES AND TRANSFORMATION: Rates Of Reaction
According to the collision theory?
Reactant particles must also possess a certain minimum amount of energy called the activation energy (E
A
) for a reaction to occur.
Chemical reactions occur due to collisions between reactant particles.
Chemical reactions occur due to collisions between reactant particles and reactant particles must also possess a certain minimum amount of energy called the activation energy (E
A
) for a reaction to occur.
None is correct.
A catalyst increases the rate of a chemical reaction by __.
Increasing the activation energy, making it possible for many more reactant particles to cross the energy barrier and collisions between them lead to chemical reactions.
Providing a larger surface area for the reacting gases if the catalyst is a solid.
Lowering the activation energy, making it possible for many more reactant particles to cross the energy barrier and collisions between them lead to chemical reactions.
Lowering the activation energy, making it possible for many more reactant particles to cross the energy barrier and collisions between them lead to chemical reactions and Providing a larger surface area for the reacting gases if the catalyst is a solid.
Example(s) of photochemical reactions include __
Photosynthesis
All are correct
The reaction between methane and chlorine
The reaction between hydrogen and chlorine
In a chemical reaction, the concentrations or amounts of products __
Decrease with time
Increases with time
Does not change with time
None is correct
The following equation represents the thermal decomposition of ammonia
2NH
3 (g)
→ N
2 (g)
+ 3H
2 (g)
Δ θ = +46KJmol
-1
The rate of the above reaction could be increased by __
All are correct
Increasing the pressure of the reaction system
The use of the catalyst iron will increase the rate of the reaction since the catalyst will lower the activation energy for the reaction
Increasing the temperature will increase the rate of reaction because the reactant particles will gain more kinetic energy are move faster hence colliding more frequently with each other