Question # 1

____________ solids are arranged in 3 dimension.

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Crystalline

Amorphous

Both

None

Force per unit area is called:

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volume

pressure

weight

density

The forces of attraction present between the molecules of a substance are called ____________ forces.

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Intermolecular forces

Covalent

Ionic

Nil

Which one of the following does not affect the boiling point?

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intermolecular forces

external pressure

nature of liquid

initial temperature of liquid

When temperature of water drops to ____________ °C it convert onto ice.

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0

-2

-1

1

Mass per unit volume is:

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Velocity

Dencity

Pressure

Nil

The simplest of these has formula:

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C60

C10

V20

C30

Gases have fixed ____________

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Shape

Volume

Area

Nil

Gases have ____________ shape.

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Fixed

Not Fixed

Nil

Both a & b

Gases are the lightest form of mater and their densities are expressed in terms of:

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mg cm^-3

g cm^-3

g dm^-3

kg dm^-3

The SI unit of pressure is:

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N

N/m²

Pascal

atm

Bucky balls are ____________ allotropic forms of carbon.

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1st

2nd

3rd

4th

At freezing point which one of the following coexists in dynamic equilibrium?

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gas and solid

liquid and gas

liquid and solid

all of these

Bucky molecules have ________________ c-atoms.

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20-60

20-90

40-60

40-100

Atoms are arranged in ________________ structure in Bucky balls.

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Hollow

Cage

A & B

Nil

Bucky Balls are used as ________________

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Cutting

Grafting

Lubricants

Nil

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

Graphite is ___________

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Hard

Nil

Soft

Nil

Which one of the following gas diffuses faster?

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hydrogen

helium

fluorine

chlorine

Bucky balls was discovered in ________________

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1965

1975

1985

1995

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