Question # 1

Tyndall effect is due to:

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block of beam of light

non - scattering of beam of light

scattering of beam of light

passing through beam of light

Non-metals are generally soft, but which one of the following is extremely hard?

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Graphite

Phosphorus

Iodine

Diamond

O3, Ozone is _________ molecules.

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Homoatomic

Hetroatomic

Monoatomic

Nil

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

T (K) =

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(T) °C + 273

(T) °C -273

(T) °C + 373

(T) °C -373

The value of Planck's constant is

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6.63 x 10-34 Js

6.63 x 10-32 Js

6.63 x 10-30 Js

6.63 x 10-28 Js

The most abundant element occurring in the oceans is:

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Oxygen

Hydrogen

Nitrogen

Silicon

Which of following does not belong to p-block?

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IIIA

IVA

VA

VIB

Bucky molecules have ________________ c-atoms.

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20-60

20-90

40-60

40-100

________________ proposed that matter is composed of small particles.

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Greek

English's

Russian

Nil

___________ is used in treatment of cancer.

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Nil

Cobalt-60

C-12

H-3

Es is symbol of :

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Erbium

Einsteinium

Europium

Fremium

Solids are fixed ____________

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Shape

Velocity

Mass

Atoms

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