1. Which of the following bacterium is used in the recovery of otherwise unprofitable grades of Uranium and Copper ores
Escherichia coli

Azotobacter

Clostridium

Thiobacillus ferroxidans


2. A measure of the amount of oxygen consumed in the biological process that break down organic matter is known as

Bioconcentration

Biochemical oxygen demand

Bioaccumulation

Biomagnification


3. Which of the following was formed first

RNA

DNA

DNA and RNA both

Eucryotic cell


4. Which of the following can be used for biological destruction of undesired fungal mass?

bacteriophages

Mycophages

TMV

HIV


5. Which of the following have alga as symbiont

Pinus

Walnut

Coralloid roots of cycas

Mango tree


6. Organisms which require ingestion of one or several organic compounds are called

Autotrophs

Facultative Autotrophs

Chemotrophs

Heterotrophs


7. Which of the following cell is present in bone cortex

Osteoblast

Osteocalcin

Stem cells

Astrocytes


8. The equation of state of a gas, incorporating the Van der Waals"" correction is given as

PV=RT



pvr=constant

pv=constant

9. Assertion Cedar wood oil is used as immersion oil for 100-X lens of microscope.
Reason The refractive index of cedar wood oil is same as that of the glass slide.
Both and are true and is correct explanation of

is true and is false

Both and are true but is not correct explanation of

is false but is true


10. How do insect pheromones work as biopesticides
Work as mating disruption agents in insects

Kills bacteria

Kills fungi

Kills protists


11. For a normal distribution, the skewness is

1

infinity

0

1/2

12. The derivatives of " at where f lxl is

zero

1

2

3

13. A cyclist starting from stand still acclerates at 0.4 m sec-1 for 10 seconds. what velocity does it reach and the distance it covers

4 m sec-1 10 m

4 m sec-1 20 m

2 m sec-1 10 m

2 m sec-1 20 m


14. The law of conservation of energy is described by

reroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics


15. A microwave source has a wavelength of 4 cm. Given then their speed is 3x10s m sec-1, the frequency is

7.0GHZ

7.5GHZ

12.0GHZ

14.0GHZ

16. As per temperature of an n-type semiconductor increases, the number of hole

Does not change but the number of electrons increases

Decreases but the number of electrons increases

Increases but the number of electrons does not change

Increases but the number of electrons decreases


17. The region of the electromagnetic spectrum, which are used for remote sensing in microwave region include

<0.1CM

0.1-2.0CM

2.0-10.0CM

0.1-30.0CM


18. Photovoltaics (solar cells) work on the principle of

Raman effect

reeman effect
Photoelectric effect

Faraday effect

19. Doppler effect is not commonly observed using light, because

Velocity of sound is much smaller than that of light

Light is an electromagnetic wave

Object has to be moving at a speed that is a significant fraction of the speed of light.

Sound is audible


20. The value of the integral .

<img src='./qimages/2110-20.jpg'><br><br>

21. One of the important mechanism of aerosol formation is

Nucleation from vapour molecules

Breakdown of nimbus clouds

Precipitation in local ponds

Cracking of ionosphere

22. Isomorphism in a solid

Refers to different shapes but same chemistry

Refers to same chemistry but different shapes

Refers to different structure but same chemistry

Refers to different chemistry but same structure

23. Electromagnetic pollution is caused by

Vehicular traffic

Mobile phones

Aircraft noise

Lightening and thunder storms

24. Effect of doubling in concentration of green house gases such as CO2, will lead to an increase in the temperature (taking initially at 300° by an amount

1.0° K

1.26° K

2.26° K

3.16° K

25. The relationship between pressure velocity and height is given by Bernoulli"s equation

<img src='./qimages/2110-25.jpg'><br><br>
26. After 560 days, 1 gm of a radioactive element is reduced to gm. The half life of the
radioactive element is

140DAYS

280DAYS

70DAYS

(D)210DAYS
27. In pure water, the generation of each one of the ions H+and OH- at standard
temperature and pressure

<img src='./qimages/2110-27.jpg'><br><br>

28. pH of sea water is about

7.0

6.0

8.0

9.2

29. In colloidal chemical substance, the light undergoes

Diffraction

Polarization

Scattering

Total internal reflection


30. In an one-component system H2O critical point refers to
Co-existence of solid and gas phases

Co-existence of all phases

Pressure of liquid and gas phase

Absence of liquid and gas phases


31. Out of the following minerals which is a non-silicate


MUscovite

quartz

hornblende

siderite

32. Density of seawater at 20° C and salinity at atmospheric pressure is

1.024785

1.25615

1.362398

1.481359

33. December 26, 2004 Tsunami in the Indian Ocean was caused by movements between
Australian and Antarctic plates

Indian andAustralian plates

Burmese arc and Indonesian archipelago

Pacific plate and Asian plate


34. Material left behind when part of a rock is removed by chemical weathering process is called

Left over deposit

Lag deposit

Residual deposit

Chemical precipitate


35. Water table that is a reference line, represents a hypothetical line below the surface where

Water is always present above the reference line

Water is never present above the reference line

Water is always present below the reference line

Above the reference line is a zone of reduction


36. Geological process whereby one constituent in a mineral is progressively substituted by another is called

Alteration

Precipitation

Absorption

Replacement


37. A landscape which shows a pattern of denudation in limestone and dolomitic rock is know as

Plateau

Mesa topography

Scarp face topography

Karst topography


38. Weathering of a granite rock produces a sedimentary rock known as


graywacke

arkose

limestone

shale

39. An environment agency measures the average velocity of flow in a river to be
1. 1 m sec-1, where it is 0.5 m deep and 5.0 m wide. The flow rate is

2.75 m3 sec

3.75 m3 sec

4.75 m3 sec

5.75 m3 sec


40. In a nuclear reactor fission of U23s is brought about by

a rays

1 rays
rays

Thermal neutrons


41. The radioactivity attributable to radon in the air is measured in

Microgram per litre

Picocuries per litre

Parts per million

Percentage


42. pH of human blood is

4

7

8

10
43. Hardness of water is due to

Na and K

Ca, Mg and CO3

Na, Ca, Mg

Ca, Mg, CO3, SO4


44. Fastest seismic wave is

y wave

x wave

m wave

p wave

45. Biomass fuels can provide a sustainable substitute for fossil fuels, with

Decrease in carbon dioxide production

Increase in carbon dioxide production

Slight variation in carbon dioxide production

No net carbon dioxide production


46. Which of the following is not a clay mineral

Kaolinite

Montimorillonite

Illite

Pyroxene


47. When a bottle of fully packed water in plastic bottle is fully frozen, then while opening

The empty space develops inside the bottle due to less total volume

Due to increased pressure inside the bottle, the bottle cracks

Due to increased volume inside the plastic bottle, the bottle cracks

Due to both increased pressure and density inside the bottle, the bottle shrinks in size


48. Global Warming Potential of the gases increases in order of

CH4 . CO2 . NO.

NO. . CH4 . CO2

CO2 . CH4 . NO.

CO2 . NO. . CH4


49. One of the following is the correct order of increasing energy content

Gasoline . Wood . Cowdung

Cowdung . Gasoline . Wood

Gasoline . Cowdung . Wood

Coal . Cowdung . Wood


50. A man weighing 70 kg on the surface of the earth, will weigh on the surface of moon

Same as that on the surface of earth

1/6 as that on the surface of earth

1/8 as that on the surface of earth

1/10 as that on the surface of earth