Question # 1

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

Empirical formula of hydrogen peroxide.

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HO

CO

CHO

CH

What is the mass of 4 moles of hydrogen gas.

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1 g

1.008 g

8.064 g

4.032 g

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

If one mole of carbon contains x atoms what is the number of atoms contained in 12 g of Mg.

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1.5 x

0.5 x

x

2x

Stochiometric calculators are used to prepare.

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Soaps

Shampo

Perfumes

All of these

The mass number of sodium is.

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19

31

27

23

Which of the following is insoluble salt

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KCl

AgCl

NaCl

CaCl2

Emperical Formula of Glucose is

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CH2O

CHO

CHO2

C2HO

40 g of H₃PO₄ contains numebr of moles

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0.58 g

4.8 g

5.8 g

0.408 g

Whof the following represent sand?

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NaCl

CaCO3

H2O

CH2O

Which compund has same molecular and emiprical formula.

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C6H12 O6

H2O2

H2O

C6H6

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Chemistry 9th Class English Medium Unit 4 Online Test MCQs With Answers

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