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MDCAT Chemistry Chapter 2 Atomic Structure Online Test MCQs With Answers

Question # 1

The number of moles of CO2 which contain 16g of oxygen

Choose an answer

0.25

1.00

1.50

0.50

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Question # 2

The B.P of H2O at Murree Hills is

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99.8C

98°C

100C°

89°C

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Question # 3

Moles of protons in 20g of SO3

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Question # 4

Which of the following is not the property of liquid crystal

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anisotropic

isotropic

three dimensional arrangement

fluidity

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Question # 5

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 # 6

If empirical formula of a compound is CH2 and its molecular mass is 56amu. What will beits molecular formula

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CH2

C3H6

C2H4

C4H8

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Question # 7

The stoichiometric calculations for a chemical reaction results in

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Actual yield

Percentage yield

Theoretical yield

Selectivity

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Question # 8

Which of the following is a limitation of balanced chemical equation

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Conditions and rate of reactions

Physical state and mechanism

Reactants and products and their coefficients

Both (a) and (b)

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Question # 9

1 gram formula refers to

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Amount in grams equivalent to 1 mole of a atom

Amount in grams equivalent to 1 mole of a covalent compound

Amount in grams equivalent to 1 mole of a ionic compound

Amount in grams equivalent to 1 mole of an ion

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Question # 10

Cholestryl benzoate tums into milky liquid at

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140°C

145°C

148C°

149°C

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