Question # 1

40 g of H₃PO₄ contains numebr of moles

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0.58 g

4.8 g

5.8 g

0.408 g

Empirical formula of acetic acid (CH3COOH) is

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CHO

CH

CH2O

None of these

Which is the correct formula of calcium phosphide.

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CaP

Ca₃P₂

CaP₂

Ca₂P₃

Which one of the following compounds will hae the highest percentage of the mass of nitrogen?

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N2H4

CO (NH2)2

NH3

NH2OH

What is the mass of AI in 204 g of aluminium oxide Al₂O₃

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26 g

54 g

108 g

27 g

Molecular mass of Acetic Acid

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70 amu

43 amu

60 amu

80 amu

Numbr of hydrogen atoms present in 18 g of water.

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2 x NA

N_A

3 x N_A

1/2 N_A

Stochiometric calculators are used to prepare.

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Soaps

Shampo

Perfumes

All of these

Limes is another name of

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Sodium hydroxide

Sodium Carbonate

Calcium Carbonate

Silicon dioxide

Which compund has same molecular and emiprical formula.

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C6H12 O6

H2O2

H2O

C6H6

How many atoms are present in one gram of H2O?

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1002 x 10²³ atom

6.022 x 10²³atom

0.334 x 10²³atom

2.004 x 10²³atom

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

Empirical formula of Benzene is.

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CH2O

CH

C2H

CH2

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