Question # 1

The formula of rust is:

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Fe₂O₃,nH₂o

Fe₂O₃

Fe(OH)₃-nH₂O

Fe(OH)₃

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

Spontaneous chemical reactions take place in:

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electrolytic cell

Galvanic cell

Nelson' s cell

downs cell

Which is an acceptor molecule/ion?

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N₂

O₂

H⁺

CH₄

Atoms are arranged in ________________ structure in Bucky balls.

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Hollow

Cage

A & B

Nil

Diamonds exists in ____________ form.

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Cubic

Linear

Circular

Nil

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

Nil

The earth is made up of ___________ % of iron.

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4

5

6

7

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

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Bohr

Rutherford

Mendeleev's

Nil

The smallest under of an ionic compound is

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Atom

Formula unit

Ion

Molecule

T (K) =

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(T) °C + 273

(T) °C -273

(T) °C + 373

(T) °C -373

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