Related Questions

The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are
A Always irreversible
B Insensitive to temperature changes
C Mostly irreversible
D Highly temperature sensitive
In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will
A Remain the same
B Be halved
C Also be doubled
D Become one fourth
A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.
A Less than
B Equal to
C More than
D Equal to or more than
A chemical reaction occurs, when the energy of the reacting molecules is __________ the activation energy of reaction.
A Less than
B Equal to
C More than
D Equal to or more than
What is the order of a chemical reaction in which doubling the initial concentration of the reactants doubles the half life time of the reaction?
A 0
B 1
C 2
D 3
If the time required to complete a definite fraction of reaction varies inversely as the concentration of the reactants, then the order of reaction is
A 0
B 1
C 2
D 3
Rate of a chemical reaction is independent of the concentration of the reactants for a __________ reaction.
A Zero order
B Third order
C Consecutive
D None of these
Enzymes (a protein) are catalysts found in organisms. Its efficiency of catalysing a reaction is due to its capacity to lower the activation energy of the reaction. The enzyme ptyalin used for food digestion is present in
A Blood
B Saliva
C Intestine
D Gland
The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy.
A Activation
B Potential
C Binding
D Threshold
Threshold energy in a reaction is equal to the
A Activation energy
B Normal energy of reactants
C Sum of A & B
D Neither A nor B

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