Question 21 : The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises form 10 to 100°C.
1. 112
2. 612
3. 512
4. 256
View Answer   Discuss with Members

Question 22 : When a catalyst increases the rate of forward reaction, the value of rate constant
1. becomes infinite
2. decreases
3. increases
4. remain same
View Answer   Discuss with Members

Question 23 : When all the limiting reactant is consumed in the reaction, the operational yield __________ the relative yield.
1. can be either greater or smaller than (depends on the type of reaction)
2. is smaller than
3. is greater than
4. equals
View Answer   Discuss with Members

Question 24 : Rate determining step in a reaction consisting of a number of steps in series is the __________ step.
1. intermediate
2. slowest
3. fastest
4. data insufficient; can't be predicted
View Answer   Discuss with Members

Question 25 : A batch reactor is characterised by
1. variation in extent of reaction and properties of the reaction mixture with time.
2. constant residence time.
3. very low conversion.
4. variation in reactor volume.
View Answer   Discuss with Members

Question 26 : In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will
1. be halved
2. remain the same
3. also be. doubled
4. become one fourth
View Answer   Discuss with Members

Question 27 : The equilibrium constant of a catalytic chemical reaction __________ due to the presence of a catalyst.
1. increases
2. decreases
3. remains unaffected
4. unpredictable from the data
View Answer   Discuss with Members

Question 28 : The rate constant of a chemical reaction increases by increasing the
1. none of these
2. reactant's concentration
3. pressure
4. temperature
View Answer   Discuss with Members

Question 29 : Which of the following is an independent variable for a batch tank reactor with uniform concentration and temperature ?
1. None of these
2. Time
3. Useful volume of the tank
4. Diameter of the reactor
View Answer   Discuss with Members

Question 30 : The catalytic activity of enzymes is due to their capacity to lower the __________ energy.
1. potential
2. kinetic
3. activation
4. none of these
View Answer   Discuss with Members