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
Reactions with high activation energy are
A Very temperature sensitive
B Temperature insensitive
C Always irreversible
D Always reversible
In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants)
A A
B N
C A+N
D A-N
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
কোন বিক্রিয়ায় সক্রিয়ন শক্তি ( activation energy) যত বেশি হবে সে বিক্রিয়ার গতি তত-
A কম হবে
B বেশি হবে
C বিক্রিয়ার গতি সক্রিয়ন শক্তির উপর নির্ভর করে না
D কোনটিই নয়
Higher free energy of activation of a chemical reaction (at a given temperature) implies
A Slower rate of reaction
B Higher rate of reaction
C Higher equilibrium conversion
D Both B and C
The energy of activation of exothermic reaction is
A Zero
B Negative
C Very large compared to that for en-dothermic reaction
D Not possible to predict
The energy of activation of a chemical reaction
A Is same as heat of reaction at constant pressure
B Is the minimum energy which the molecules must have before the reaction can take place
C Varies as fifth power of the temperature
D Both B and C
When the reaction occurs in the diffusion controlled region, the apparent activation energy as measured is only __________ the true value.
A Twice
B Half
C Equal
D None of these

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