Question # 1

Metals lose their electrons easily because:

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They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

Halogens with metals for

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Ionic bond

Covalent bond

Dative covalent bond

Metallic bond

In diamonds, carbon are ____________ bonded.

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Tetrahedrally

Single

Double

None

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

Nil

One amu (atomic mass unit) is equivalent to:

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1.66x10^-24 mg

1.66x 10^-24g

1.66x10 g

1.66x10^-23mg

The mass of one molecule of water is:

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18 amu

18g

18mg

18kg

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

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Freedom

Flow

Stability

Nil

Which of the following compound is not directional in its bonding?

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CH⁴

KBr

CO²

H₂O

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

Which pair of compounds is soluble?

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Ether and water

KCI and water

Benzene and water

Petrol and water

............... periodic table consist of group & periods.

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Bohr

Rutherford

Mendeleev's

Nil

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