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Recently added practice questions

3741. The rate of the reaction, X ? Y, quadruples when the concentration of X is doubled. The rate expression for the reaction is, r = K Cx n, the value of n in this case will be_______________________?
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A. 2

B. 0

C. 1

D. 3

3742. The rate of the heterogeneous catalytic reaction A(g) + B(g) ? C(g) is given by -rA = k.KA.pA.PB/(1 + KA.PA + Kc.pc), where KA and Kc are the adsorption equilibrium constants. The rate controlling step for this reaction is_______________?
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A. Surface reaction between absorbed A and absorbed B

B. Surface reaction between A in the gas phase and absorbed B

C. Absorption of A

D. Surface reaction between absorbed A and B in the gas phase
3743. The rate of reaction of a/an ______________ reaction is not affected by temperature rise ?
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A. Zero order

B. Autocatalytic

C. Consecutive

D. Photochemical
3744. The rate of payment is made for 100 cu m (per % cu m) in case of__________________?
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A. Earth work in excavation

B. All the above

C. Excavation in trenches for foundation

D. Rock cutting

3745. The rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the___________________?
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A. Heating volume

B. None of these

C. Heat transfer area

D. Nusselt number

3746. The rate of BOD exerted at any time is_____________?
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A. directly proportional to BOD remain-ing

B. inversely proportional to BOD re-maining

C. directly proportional to BOD satisfied

D. inversely proportional to BOD satisfied

3747. The rate of acceleration on suburban orurban service is in the range_________________?
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A. 0.2 to 0.5 km phps

B. 1.6 to 4.0 km phps

C. 15 to 25 km phps

D. 5 to 10 km phps

3748. The rate of a chemical reaction is almost doubled for every 10C rise in temperature. The rate will increase ______________ times, if the temperature rises from 10 to 100C?
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A. 112

B. 256

C. 612

D. 512
3749. The rate expression for a heterogeneous catalytic reaction is given by, rA = K.KA PA(1 + KA.PA + KR.PR), where K is surface reaction rate constant and KA and KR are absorption equilibrium constants of A and R respectively. If KR PR >> (1 + KA PA), the apparent activation energy EA is equal to (given E is the activation energy for the reaction and ?HR and ?HA are the activation energies of adsorption of R and A) ?
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A. E

B. E + ?HA

C. ?HA + ?HR

D. E + ?HA ?HR)
3750. The rate controlling step for the heterogeneous irreversible catalytic reaction A(g) + B(g) ? C(g) is the surface reaction of absorbed A with absorbed B to give adsorbed C. The rate expression for this reaction can then be written as (where, KA, KB and KC are the equilibrium constants and is the rate constant of the rate controlling step) ?
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A. k KAKB pApB / (1 + KApA + KBpB + KCpC)

B. k KAKB pApB / (1 + KApA + KBpB)

C. k KA pApB / (1 + KApA + KBpB)

D. k KAKB pApB / (1 + KApA + KBpB + KCpC)2
3751. The range of Mhos scale of hardness is from________________?
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A. 1 to10

B. 1 to 8

C. 1 to 15

D. 0 to 10

3752. The range of enhanced version of Babur cruise missile is__________?
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A. 700 km

B. 450 km

C. 800 km

D. 1500 km

3753. The random motion of holes and free electrons due to thermal agitation is called______________?
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A. Ionisation

B. Pressure

C. Diffusion

D. None of the above

3754. The Ramon Magsaysay Award named after a Filipino president killed in a plane crash was established in________?
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A. 1967

B. 1957

C. 1960

D. None of these

3755. The Rainbow is a novel written by______________?
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A. Hemingway

B. Virginia Woolf

C. E.M. Forster

D. D.H. Lawrence
3756. The Rainbow is a novel written by______________?
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A. Virginia Woolf

B. E.M. Forster

C. D.H. Lawrence

D. Hemingway

3757. The radius of a cylindrical vessel is 7cm and height is 3cm. Find the whole surface of the cylinder?
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A. 440 sq cm

B. 132 sq cm

C. 220 sq cm

D. 308 sq cm

3758. The radius of a bar bend to form a hook, should not be less than_______________?
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A. Four times the diameter

B. Thrice the diameter

C. Twice the diameter

D. Five times the diameter

3759. The radicular pulp is continous with tissues of the periapical area via the____________?
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A. Pulp chamber

B. Mental foramen

C. Apical foramen

D. Pulp canal

3760. The radiation heat flux from a heating element at a temperature of 800C, in a furnace maintained at 300C is 8 kW/m2. The flux, when the element temperature is increased to 1000C for the same furnace temperature is_____________________?
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A. 12.0 kW/m2

B. 14.6 kW/m2

C. 11.2 kW/m2

D. 16.5 kW/m2

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