You are asking for the BPCL placement previous year paper. Here I am provide you the BPCL placement previous year paper. This is as follows:

1. Dissolving salt in water is an example of which type of change ?

Physical-Ans

Nuclear

Chemical

Biochemical


2. When nuclear change takes place, which is true

Energy is destroyed

Energy is released

Energy is changed

None of these

The answer is Energy is released

3. Which type of radiation is unaffected by magnetism ?

Alpha

Beta

GammaAns

All of these


4. Which temperature scale is an absolute scale, where the zero point is the lowest possible temperature ?

KelvinAns

Celsius

Fahrenheit

Centigrade


5. The relative randomness of molecules in the states of matter is best indicated by

Solid > Liquids > Gas

Liquid > Gas > Solid

Liquid > Solid > Gas

Gas > Liquid > SolidAns


6. Whether or not two liquids are miscible is determined by

Molecular Size : Molecules of similar sizes tend to mix together

Density : Liquids of simliar densities usually mix well together

Polarity : Polar and nonpolar liquids are not miscible while polar liquids can usually be mixed with each other Ans

All of the above factors directly affect miscibility


7. The Triple Point is

The combination of standard temperature, pressure and volume

The combination of temperature and pressure at which the solid, liquid and gas phases can coexist at equilibrium

The combination of pressure and temperature at which liquid, gas, and plasma phases all exist in equilibrium

The combination of temperature and pressure at which liquids and gases cannot be distinguished from each other


8. If the work done by a force depends only on the initial and final stages and not on the path taken, then this type of force will be

Conservative Force

Non-conservative Force

Conservative as well as Non-conservative force

None of these


9. Working between which pair of following temperatures, the efficiency of a carnot engine will be maximum ?

10 Degrees F and 10 Degress R

10 Degrees F and 10 Degress C

10 Degrees R and 10 Degress C

It will be same in all the above cases


10. Dacron is a

Polyester

Polyamide

Nylon

Resin


11. Which of the following has the highest stable atom ?

Bi

Al

Cl

Pb


12. In Friedel-Crafts reaction, AlCl3 acts as a

Lewis Acid

Lewis Base

Catalyst

Reactant


13. The number of unpaired electrons in [Ni(CO)4] is

Zero

One

Three

Five


14. Iodoethane reacts with sodium to form

Pentane

Propane

Butene

Butane

15. An ideal gas has maximum density at

1 atm, 300 K

2 atm, 150 K

0.5 atm, 600 K

1 atm, 500 K
.

16. Which of the following metals is present in brass, bronze and german silver ?

Defence Mechanism

Hydrolysis of ATP

Trifling of Contraction

Generating right electrical potential across cell membrane
.

17. First ionization potential is ___________ second ionization potential.

Less than

More than

Equal to

None of these


18. n-propyl benzene is best prepared by

Friedel-Crafts Reaction

Wurtz Reaction

Wurtz-Fitting Reaction

Grignard Reaction


19. Chloroform is slowly oxidized by air to

Formly Chloride

Carbonyl Chloride

Trichloroacetic Acid

Formic Acide


20. Electrophoresis is

Movement of colloidal particle under the influence of electric field

Movement of colloidal particle under the influence of magnetic field

Movement of colloidal particle in zig-zag fashion

Scattering of light by colloidal particles


21. Rosenmund's reduction of an acyl chloride gives

Alcohol

Ester

Hydrocarbon

Aldehyde
.

22. Pyrophosphoric acid is

Monobasic

Dibasic

Tribasic

Basic
.

23. Which of the following is an example of a mathematical model ?

Area of a circle = PI x Radius^2

Volume of a cube = Length^3

Force = Mass x Acceleration

All of the above
.

24. The specific activity of an enzyme is relatively constant between pH 3-8. If the enzyme activity at pH 7.0 is to be modeled, which of the following would be a reasonable simplifying assumption ?

Specific activity is not dependent on temperature

Specific activity is not dependent on substrate concentration

Specific activity is not dependent on pH

All of the above
.

25. The bioreactor which is most commonly used in industry is the

Batch Fermenter

Fed Batch Fermenter

Continous Fermenter

Batch Continous Fermenter
.

26. Which of the following is correct with regards to microbial growth ?

Cells are autocatalysts and thus the rate of increase in biomass (dX/dt) keeps changing

Many factors affect cell growth

The rate of increase in biomass concentration is not constant during a fermentation

All of the above are correct
.

27. During a batch fermentation, when would the specific growth rate be lowest ?

During exponential phase

During the lag and stationary phase

When cells are growing at their fastest rate

Throughout the fermentation
.

28. Which of the following describes a limitation of the exponential growth model ?

Biomass growth is assumed to be not linked to the availability of nutrients or substrates

It does not predict when cell growth will cease

It predicts that all types of cells under all conditions will grow exponentially

All of the above are correct
.

29. In large scale bioreactors, dissolved oxygen levels are often so low that they restrict the rate of cell growth. In this case

Dissolved oxygen would be the growth limiting nutrient

The nitrogen source would be the growth limiting nutrient

The carbon source would be the growth limiting nutrient

Dissolved oxygen levels would not be the growth limiting nutrient
.

30. Which of the following is not correct ?

The Monod model is an empirical correlation

The Michaelis Menten model is a mechanistic model

The Monod model was derived from a study of the mechanism of microbial growth

The Michaelis Menten model was derived from a study of the mechanism of enzyme action
.

31. The technique of Nick Translation was developed by

Rigby and Paul Berg

Winkler

Roderick and Rigby

None of them
.

32. Which technique allows knowing the status in the interphase ?

Hybridization Microarray

Karyotyping

Fluorescence in situ Hybridization

Pedigree Analysis
.

33. _________ observed that protein sequences undergo variation during evolution according to certain patterns

Zuckerkandl

Pauling

Margaret Dayoff