Question # 1

How many number of moles are equivalent to 8 gram of CO2.

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0.18

0.15

0.24

0.21

Mass of 3 moles of oxygen atoms is.

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64 g

16 g

32 g

48 g

1- gram atom of carbon contain hwo many moles.

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1 mole

2 mole

6 moles

12 moles

How many atoic mass units (amu) are there in one gram.

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1 amu

6.022 x 10²³

10 amu

6.022 x 10²²

Formula of common salt is

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NaCl

AgCl

LiCl

KCl

Avogadrao was a scientist

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Italian

Greek

Garman

African

Formula of Ozone.

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O₂

S₈

CO₂

O₃

Empirical formula of Benzene is.

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CH2O

CH

C2H

CH2

Which is the correct formula of calcium phosphide.

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CaP

Ca₃P₂

CaP₂

Ca₂P₃

What mass of 95% CaCO3 will be requred to neutralize 50 cm 3 of 0.5 M HCl solution.

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9.5 g

1.45 g

1.32 g

1.25 g

The mass of one molecule of water is.

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18 g

18 mg

18 kg

18 amu

Whcih law is obeyed in chemicla calculations?

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Law of mass action

Law of conservationof mass

Law of definite proportion

Both a and b

Without stoichiometry which industry cannot exist.

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