Question # 1

Br2 + H2S __ 2HBr + S, which one is oxidizing agent:

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H2S

Br2

S

2HBr

Which one of the following is an electron deficient molecule?

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HN₃

BF₃

N₂

O₂

Which one is least reactive non-metal?

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P

C

CI

F

Every system in the universe tends to lower its energy to attain ________________

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Freedom

Flow

Stability

Nil

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

Bucky Balls are used as ________________

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Cutting

Grafting

Lubricants

Nil

It is heterogeneous mixture

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Sand

Milk

Air

Brass

Gases have fixed ____________

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Shape

Volume

Area

Nil

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

The concept of orbit was used by:

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J.J Thomson

Rutherford

Bohr

Planck

The number of isotopes of carbon are

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1

2

3

5

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

Electron _____________ energy when thy jump from higher to lower level.

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Absorb

Radiate

Nothing

Nil

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