Question # 1

Ionic compound are ________________ in water.

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insoluble

Soluble

Covalent

Solvent

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

Halogens with metals for

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Ionic bond

Covalent bond

Dative covalent bond

Metallic bond

Air is an example of:

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Gas in gas

Solid in gas

Liquid in gas

Gas in ;iquid

The lowest energy level is

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K

L

M

N

____________ are good conductors of electricity.

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Covalent compound

Metals

Both

None of these

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

105 elements were discovered by the year ________________

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1984

1974

1086

1996

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

It is a strong electrolyte

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H2O

CH3COOH

NaOH

C6H6

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

Bucky Balls are used as ________________

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Cutting

Grafting

Lubricants

Nil

The isotopes of an element have different number of

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Electrons

Protons

Neutrons

Protons & Neutrons

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