Question # 1

Bucky balls was discovered in ________________

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1965

1975

1985

1995

Which one of the following pair has the same mass?

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1 mole of CO and 1 mole of N₂

1 mole of CO and 1 mole of CO₂

1 mole of O₂ and 1 mole of N₂

1 mole of O₂ and 1 mole of CO₂

_________ elements naturally occurring.

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92

118

93

117

Polyatomic molecules consist of _________ atoms.

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1

More than 1

Less than 1

2

Long form of periodic Table is constructed the basis of:

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Mendeleev postulate

atomic number

atomic mass

mass number

_________ can be separated by physical means.

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Mixture

Compound

Solution

Nil

The no.of elements in the first period is

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2

8

18

23

The molar mass of H₂SO₄ is:

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98 g

98 amu

9.8 g

9.8 amu

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

____________ of copper is done by electrolysis.

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Production

Refining

Both

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

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

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