Question # 1

What is abuckyball

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A carbon molecule

Nickname for Mercedes -Benz's futuristic concept car (CIII)

Plastic explosives nanoparticle (C4)

Concrete nanoparticle with a compressive strength of 20 nanonewtons(C20)

Major principle underlying the sustainability of natural ecosystems is that they run on.

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Electric energy

Solar energy

Wind energy

None of the above

Which of the following carbides reacts with H2O to form propane.

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Al4C3

CaC2

SiC2

Sic

What exactly is quantum dot

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A semiconductor nanostructure that confines the motion of conduction band electrons, valence band holes or excitation in all three spatial directions

The sharpest possible tip of an atomic force microscope

A fictional term used in science fiction for the endpoints of wormholes

Unexplained spots that appear electron microscopy images of nanostructures smaller than 1 nanometer

Which of the following type of lattice has maximum numb of atoms per unit cell.

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Simple cubic

Body centred cubic

Face centred cubic

All of them

The vapour pressure of a liquid

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Always increase's with temperature

Always decreases with temperature

Is independent of temperature

Increase up to the boiling point

What refers to a shape achieved by allowing a liquid to solidify in a mold.

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Casting

Molding

Forming

All of the choices

The alpha iron will become paramagnetic at temperature above

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770 C

550 C

660 C

440 C

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

The equivalent conductance of a 1 N solution of an electrolyte is nearly

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The same as its specific conductance

10³ times more than its specific conductance

10-3 times its specific conductance

100 times its specific conductance.

"There is a plenty of room at the bottom" This was stated by

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Issac Newton

Albert Einstein

Richard Feynman

Eric Drexler

The value of an Einstein

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Is independent of wavelength

Decrease with increase in wavelength

Increase with increase in wavelength

Depends on the temperature of the absorbing system

The number of phases of mixtures of four gases enclosed in a container is

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1

4

4-1

zero

Which of the following pollutants does not a leave a residue.

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Air pollutant

Chemical pollutant

Soil pollutant

Noise pollutant

The width of a carbon nano tube is.________ nm

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1

1.3

2.5

10

_________ is used as stablizer.

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CaO

SiO2

NaCl

None of these

The inert gasses AR, Ka, and Xe form solid compounds with certain organic molecules under pressure..

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Halides

Hydrates

Clathrates

All of above

A molecule returns from the excited singlet state to the ground singled state with emission of light , This process is known as.

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Fluorescene

Scattering

Phosphorescence

Chemiluminescence

Vitamin which contains cobalt is.

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Vitamin B1

Vitamin B2

Vitamin B6

Vitamin B12

The contact process is mainly used when acid is required for the manufactures of.

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Explosives

Fine chemicals

Lead accumulators

All above

Which of the following reactions does not take place with light radiation.

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Oxidation

Reduction

Polymerization

Double displacement

The orientation of a crystalline surface is confidently defined in terms of.

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Lijima Indices

Miller indices

Clausen indices

None

A correct reaction mechanism for a given reaction usually is.

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The same as the balanced chemical equation

Obvious if its heat of reaction is known

Sometimes difficult to prove

Obvious if the activation energy is known

The kinetics of the decomposition of ammonia on the tungsten surface follows

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Zero order

First order

Second order

Third order

Neon is used in neon signs for advertising purpose because.

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Neon lights are visible from long distance

Neon light are visible though fog & mist

Both A and B

None of the above

What nickel alloy has high electrical and corrosion resistance and high strength at red heat temperature and contain 15 to 20% chromium.

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Alnico

Nichrome

Invar

None of above

Ionization potential of carbon is.

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11.2

7.8

8.1

7.3

The migration of positively charged colloidal particles, under an electrical field , towards the cathode is called.

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Cataphoresis

Electroamosis

Sedimentation

Electrodialysis

The lowest K.E. for an electron is three dime national cubic box is given by

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h²/ 8m^a

3h² / 8 ma²

9h²/ 8ma²

16h² / 8ma²

Variable electrovalency is due to the following reasons.

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Unstable configuration of core

Inset electron pair effect

All of above

None of above

What refer by the ability of steel to be hardened through to its centre in large section?

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Malleability

Hardenability

Ductility

Rigidity

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