Chemical Reaction

_____________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst?

Byadmin February 19, 2019August 23, 2021

_____________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst?

A. N2
B. H2
C. CO2
D. He

Chemical Reaction

Which of the following holds good for an elementary reaction as shown in the bellow figure ?

Which of the following holds good for an elementary reaction as shown in the bellow figure ?

A. The rate of disappearance of ‘Y’ is equal to the rate of appearance of ‘Z’
B. The rate of disappearance of ‘Y’ is equal to the rate of disappearance of ‘X’
C. Three times the rate of disappearance of ‘X’ is equal to the rate of appearance of ‘Z’
D. The rate of disappearance of ‘X’ is equal to the rate of appearance of ‘Z’

Read More Which of the following holds good for an elementary reaction as shown in the bellow figure ?
Chemical Reaction

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 ?

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

Read More 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 ?
Chemical Reaction

For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?

For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?

A. -rA = (k . PA . PB)/(1 + KAPA + KPPP)
B. -rA = (k . PA
2 – k1PP)/(1 + KAPA + KPPP)
C. -rA = (k . PA . PB)/(1 + KAPB + KBPB . KPPP)
D. -rA = (k . PA . PB)/(1 + KAPA)

Read More For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?
Chemical Reaction

A rise in temperature ______________________?

A rise in temperature ______________________?

A. Normally tends to increase the reaction rate
B. Does not affect a catalysed reaction
C. Does not affect photo-chemical reaction rates
D. All A., B. and C.

Read More A rise in temperature ______________________?
Chemical Reaction

An isothermal aqueous phase reversible reaction, P ⇌ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is_________________?

An isothermal aqueous phase reversible reaction, P ⇌ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is_________________?

A. 0.80
B. 1.33
C. 1.60
D. 2.67

Read More An isothermal aqueous phase reversible reaction, P ⇌ R, is to be carried out in a mixed flow reactor. The reaction rate in k.mole/m3 .h is given by, r = 0.5CP – 0.125CR. A stream containing only P enters the reactor. The residence time required (in hours) for 40% conversion of P is_________________?
Chemical Reaction

With an increase in pressure in gaseous phase chemical reactions, the fractional conversion ______________ when the number of moles decreases?

With an increase in pressure in gaseous phase chemical reactions, the fractional conversion ______________ when the number of moles decreases?

A. Increases
B. Decreases
C. Remain unaffected
D. Unpredictable from the data

Read More With an increase in pressure in gaseous phase chemical reactions, the fractional conversion ______________ when the number of moles decreases?