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MDCAT Chemistry Chapter 2 Atomic Structure Online Test MCQs With Answers

Question # 1

Molecular ions are produced in mass spectrometer. Which type of molecular ion formed more abundantly.

Choose an answer

Negatively charged

H⁺ ions

Positively charged

equal positive and negative ions

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Question # 2

What s the boling point of H2O at the peak of Mount Everest?

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101 C°

69°C

100 C°

98° C

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Question # 3

How many isotopes are present in palladium

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Two

Four

Six

nine

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Question # 4

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 # 5

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

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% W/W

% W/V

% V/V

%V/W

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Question # 6

1 gram molecule refers to amount in grams

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Equivalent to 1 mole of an atom

Equivalent to 1 mole of a molecule

Equivalent to 1 mole of an ionic species

Of an ionic compound

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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

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 # 9

How many grams of NaOH are present in 250 cm3 of its 0.2M solution

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,4 g

, 0.4 g

, 10 g

, 2 g

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Question # 10

Which of the following compound have empirical formula, but no molecular formula

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H20

C6H6

H₂O₂

NaCl

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