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MDCAT Chemistry Chapter 1 Introduction to fundamental concepts of chemistry Online Test MCQs With Answers

Question # 1

When liquid solute is dissolved in liquid solvent, then the best unit of concentration is?

Choose an answer

% W/W

% W/V

% V/V

%V/W

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Question # 2

5604 cm3 of H2 gas at STP contains atoms of hydrogen

Choose an answer

6.02×10 (23)

2.6x10(22)

3.01x10(23)

1. 50x 10(23)

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Question # 3

The best concentration unit used for K⁺ ions present in potable water is

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ppm

Mole fraction

Molarity

Molality

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Question # 4

Number of H+ ions when 0.1 mole of sulfuric acid is completely ionized in water

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4x6.022x10ê23

1×6.022x10ê23

2x6.022 x10ê23

2x6.022x10ê22

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Question # 5

The largest number of molecules are present in

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3.6 g of H2O

4.6 g of C2H5OH

2.8 g of CO

5.4 g of N2O5

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Question # 6

Evaporation occurs at all temperatures and is effected by

Choose an answer

surface area

temperature

intermolecular forces

all of these

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Question # 7

6Na+ Fe2O3 -------- 3 Na2O+2Fe For above reaction, if you are provided with 230g Na and 320g Fe2O3, then limiting reactant is

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, Na

Na2O

Fe2O3

none of these

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Question # 8

How many isotopes are present in palladium

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Two

Four

Six

nine

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Question # 9

250cm of 0.2 molar potassium sulphate solution is mixed with 250cm of 0.2 molar KCI solution. The molar concentration of K ions is:

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0.2 molar

0.25 molar

0.3 molar

0.35 molar

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Question # 10

Point out that which is not an application of liquid crystals?

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Source of energy

In display of electrical devices

For skin thermography

As temperature sensor

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