04. CHEMICAL KINETICS
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CHEMICAL KINETICS

24051 Which of the following is correct ?

1 molecularity of a reaction can be fractional
2 Zero order reaction never stops
3 A first order reaction must be homogeneous
4 The rate constant of a reaction becomes equal to the pre-exponential factor when the absolute temperature is infinity
CHEMICAL KINETICS

23930 If \(k\) is rate constant and \(t\) is time then the degree of dissociation for a substance undergoing decay with first order kinetics is

1 \({e^{ - kt}}\)
2 \(1 - {e^{ - kt}}\)
3 \(1 + {e^{ - kt}}\)
4 \({e^{kt}}\)
CHEMICAL KINETICS

23616 According to the collision theory of chemical reactions

1 A chemical reaction occurs with every molecular collision
2 Rate is directly proportional to the number of collisions per second
3 Reactions in the gas phase are always of zero order
4 Reaction rates are of the order of molecular speeds
CHEMICAL KINETICS

23403 If doubling the concentration of a reactant \( 'A'\)  increases the rate \(4\) times and tripling the concentration of \('A' \) increases the rate \(9\)  times, the rate is proportional to

1 Concentration of  \(`A'\)
2 Square of concentration of \( `A'\)
3 Under root of the concentration of \( `A'\)
4 Cube of concentration of \( `A'\)
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CHEMICAL KINETICS

24051 Which of the following is correct ?

1 molecularity of a reaction can be fractional
2 Zero order reaction never stops
3 A first order reaction must be homogeneous
4 The rate constant of a reaction becomes equal to the pre-exponential factor when the absolute temperature is infinity
CHEMICAL KINETICS

23930 If \(k\) is rate constant and \(t\) is time then the degree of dissociation for a substance undergoing decay with first order kinetics is

1 \({e^{ - kt}}\)
2 \(1 - {e^{ - kt}}\)
3 \(1 + {e^{ - kt}}\)
4 \({e^{kt}}\)
CHEMICAL KINETICS

23616 According to the collision theory of chemical reactions

1 A chemical reaction occurs with every molecular collision
2 Rate is directly proportional to the number of collisions per second
3 Reactions in the gas phase are always of zero order
4 Reaction rates are of the order of molecular speeds
CHEMICAL KINETICS

23403 If doubling the concentration of a reactant \( 'A'\)  increases the rate \(4\) times and tripling the concentration of \('A' \) increases the rate \(9\)  times, the rate is proportional to

1 Concentration of  \(`A'\)
2 Square of concentration of \( `A'\)
3 Under root of the concentration of \( `A'\)
4 Cube of concentration of \( `A'\)
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CHEMICAL KINETICS

24051 Which of the following is correct ?

1 molecularity of a reaction can be fractional
2 Zero order reaction never stops
3 A first order reaction must be homogeneous
4 The rate constant of a reaction becomes equal to the pre-exponential factor when the absolute temperature is infinity
CHEMICAL KINETICS

23930 If \(k\) is rate constant and \(t\) is time then the degree of dissociation for a substance undergoing decay with first order kinetics is

1 \({e^{ - kt}}\)
2 \(1 - {e^{ - kt}}\)
3 \(1 + {e^{ - kt}}\)
4 \({e^{kt}}\)
CHEMICAL KINETICS

23616 According to the collision theory of chemical reactions

1 A chemical reaction occurs with every molecular collision
2 Rate is directly proportional to the number of collisions per second
3 Reactions in the gas phase are always of zero order
4 Reaction rates are of the order of molecular speeds
CHEMICAL KINETICS

23403 If doubling the concentration of a reactant \( 'A'\)  increases the rate \(4\) times and tripling the concentration of \('A' \) increases the rate \(9\)  times, the rate is proportional to

1 Concentration of  \(`A'\)
2 Square of concentration of \( `A'\)
3 Under root of the concentration of \( `A'\)
4 Cube of concentration of \( `A'\)
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CHEMICAL KINETICS

24051 Which of the following is correct ?

1 molecularity of a reaction can be fractional
2 Zero order reaction never stops
3 A first order reaction must be homogeneous
4 The rate constant of a reaction becomes equal to the pre-exponential factor when the absolute temperature is infinity
CHEMICAL KINETICS

23930 If \(k\) is rate constant and \(t\) is time then the degree of dissociation for a substance undergoing decay with first order kinetics is

1 \({e^{ - kt}}\)
2 \(1 - {e^{ - kt}}\)
3 \(1 + {e^{ - kt}}\)
4 \({e^{kt}}\)
CHEMICAL KINETICS

23616 According to the collision theory of chemical reactions

1 A chemical reaction occurs with every molecular collision
2 Rate is directly proportional to the number of collisions per second
3 Reactions in the gas phase are always of zero order
4 Reaction rates are of the order of molecular speeds
CHEMICAL KINETICS

23403 If doubling the concentration of a reactant \( 'A'\)  increases the rate \(4\) times and tripling the concentration of \('A' \) increases the rate \(9\)  times, the rate is proportional to

1 Concentration of  \(`A'\)
2 Square of concentration of \( `A'\)
3 Under root of the concentration of \( `A'\)
4 Cube of concentration of \( `A'\)
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