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February 2019

Which of the following will favour the reverse reaction in a chemical equilibrium reaction ?

Chemical Reaction /
Which of the following will favour the reverse reaction in a chemical equilibrium reaction ?

A. Increasing the concentration of one of the reactants
B. Increasing the concentration of one or more of the products
C. Removal of at least one of the products at regular interval
D. None of these

Which of the following will favour the reverse reaction in a chemical equilibrium reaction ? Read More »

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) ?

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) ?

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)

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) ? Read More »

Chemical Reaction

At a given temperature, K1, K2 and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g), CO(g) + H2O(g) ⇌ CO2(g) + H2(g) CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) Then K1, K2 and K3 are related as ?

Chemical Reaction /
At a given temperature, K1, K2 and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g), CO(g) + H2O(g) ⇌ CO2(g) + H2(g) CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) Then K1, K2 and K3 are related as ?

A. K3 = K1.K2
B. K3 = (K1.K2)0.5
C. K3(K1+K2)/2
D. K3 = (K1.K2)2

At a given temperature, K1, K2 and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH4(g) + H2O(g) ⇌ CO(g) + 3H2(g), CO(g) + H2O(g) ⇌ CO2(g) + H2(g) CH4(g) + 2H2O(g) ⇌ CO2(g) + 4H2(g) Then K1, K2 and K3 are related as ? Read More »

Chemical Reaction

For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a_________________?

Chemical Reaction /
For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a_________________?

A. Batch reactor is preferred over a single CSTR for high yield
B. Tubular reactor is preferred over a single CSTR for high yield
C. Both A. and B.
D. Single CSTR is the most suitable

For reactions in parallel viz A → P (desired product) and A → Q (unwanted product), if the order of the desired reaction is higher than that of the undesired reaction, a_________________? Read More »

Chemical Reaction

A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ?

Chemical Reaction /
A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ?

A. Large reactor followed by smaller one
B. Smaller reactor followed by larger one
C. Either of the arrangement A. or B. will give the same yield
D. Data insufficient, can’t be predicted

A first order reaction requires two unequal sized CSTR. Which of the following gives higher yield ? Read More »

Chemical Reaction

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 from 10 to 100°C?

Chemical Reaction /
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 from 10 to 100°C?

A. 256
B. 512
C. 112
D. 612

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 from 10 to 100°C? Read More »

Chemical Reaction