Question # 1

In metal hydrides, the oxidation number of hydrogen is

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+1

-1

+2

-2

____________ do not conduct electricity.

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Electrolyte

Non-electrolyte

Both

Nil

The base of modern periodic table is

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Atomic number (Z)

Mass number (A)

Avogadro's Number

Quantum Number

All electrolytes are:

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Conductor

Insulator

Semi conductor

Nil

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

The formula of benzene is _________

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C6H6O3

C6H6

C12H22

Nil

In isotopes numbers of ________________ is same.

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Protons

Electrons

Neutrons

Mass number

PCL5 is ________________ shaped.

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Bipyromidal

Angular

Triangular

Linear

Gases have ____________ shape.

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Fixed

Not Fixed

Nil

Both a & b

Gases are the lightest form of mater and their densities are expressed in terms of:

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mg cm^-3

g cm^-3

g dm^-3

kg dm^-3

One carbon is _________ times heavier than hydrogen.

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12

13

14

15

All non-metals are non-conductor of heat and electricity except it

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Phosphorous

Sulphur

Graphite

Iodine

Gases produced in Nelson's cell are:

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H₂ and O₂

H₂ and CI₂

H₂ and N₂

CI₂ and O₂

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