Holding time for flow reactors is _______________ the space time, for constant fluid density ?
A. Double
B. Triple
C. Equal to
D. None of these
Month: February 2019
The reactions of high molecularity are rare, because________________?
The reactions of high molecularity are rare, because________________?
A. Of very large activation energy of many bodies
B. Of low probability of many body collisions
C. Many body collisions are not favoured energetically
D. Of requirement of very large concentration for such reactions
The role of a catalyst in a chemical reaction is to change the__________________?
The role of a catalyst in a chemical reaction is to change the__________________?
A. Equilibrium constant
B. Activation energy
C. Final products
D. Heat of reaction
Slurry reactors are characterised by the_________________?
Slurry reactors are characterised by the_________________?
A. Lack of intraparticle diffusion resistance
B. Presence of two mobile phases
C. Both A. and B.
D. Neither A. nor B.
consecutive reaction, as shown in the bellow figure, is characterised by __________________?
consecutive reaction, as shown in the bellow figure, is characterised by __________________?
AA. Maxima in the concentration of A
B. Maxima in the concentration of B
C. Maxima in the concentration of C
D. High exothermicity
A multiple reaction may be classified as a ________________ reaction?
A multiple reaction may be classified as a ________________ reaction?
A. Consecutive or side
B. Parallel or side
C. Mixed
D. All A., B. and C.
Molecularity of a reaction__________________?
Molecularity of a reaction__________________?
A. Is always equal to the overall order of reaction
B. May not be equal to the order of reaction
C. Can’t have a fractional value
D. Both B. and C.
A balanced chemical reaction equation conforms to the law of________________?
A balanced chemical reaction equation conforms to the law of________________?
A. Conservation of mass
B. Avogadro’s hypothesis
C. Gaseous volumes
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 ___________________?
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
Which of the following chemical reactions will be favoured by low pressure ?
Which of the following chemical reactions will be favoured by low pressure ?
A. 2HI ⇌ H2 + I2
B. N2O2 ⇌ 2NO2
C. N2 + O2 ⇌ 2NO
D. None of these