Question # 1

Which of the following is insoluble salt

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KCl

AgCl

NaCl

CaCl2

Empricial formula of sand is.

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SiO2

SiO3

SiO4

SiO

1- gram atom of carbon contain hwo many moles.

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1 mole

2 mole

6 moles

12 moles

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

Formula of Ozone.

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O₂

S₈

CO₂

O₃

Empirical formula of acetic acid (CH3COOH) is

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CHO

CH

CH2O

None of these

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

Empirical formula of hydrogen peroxide.

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HO

CO

CHO

CH

40 g of H₃PO₄ contains numebr of moles

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0.58 g

4.8 g

5.8 g

0.408 g

Mass of 3 moles of oxygen atoms is.

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64 g

16 g

32 g

48 g

How many atom of carbon are present in one molecule of glucose.

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11

22

12

6

Stochiometric calculators are used to prepare.

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Soaps

Shampo

Perfumes

All of these

Number of moels in 29.25 g NaCl is.

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0.50

0.25

0.21

0.75

Avogadrao was a scientist

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Italian

Greek

Garman

African

Without stoichiometry which industry cannot exist.

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0.765 Moles

0.255 moles

0.4 moles

0.51 moles

Value of Avagadro's number is.

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6.6 x 10^-20

6.02 x 10²³

6.00 x 10²⁴

1.32 x 10²³

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

Emperical Formula of Glucose is

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CH2O

CHO

CHO2

C2HO

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

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