Periodic Table and Periodicity
Q. What is the trend in ionization energy as you move across a period from left to right?
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A.
Increases
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B.
Decreases
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C.
Remains the same
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D.
Varies unpredictably
Solution
Ionization energy generally increases across a period due to increasing nuclear charge.
Correct Answer: A — Increases
Q. Which acid is considered a strong acid in aqueous solution?
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A.
Acetic acid
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B.
Hydrochloric acid
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C.
Citric acid
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D.
Carbonic acid
Solution
Hydrochloric acid (HCl) is a strong acid that completely dissociates in water.
Correct Answer: B — Hydrochloric acid
Q. Which of the following compounds is a coordination compound?
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A.
NaCl
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B.
Cu(NH3)4SO4
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C.
H2O
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D.
CCl4
Solution
Cu(NH3)4SO4 is a coordination compound with a central metal ion surrounded by ligands.
Correct Answer: B — Cu(NH3)4SO4
Q. Which of the following elements is most likely to form a +2 oxidation state?
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A.
Magnesium
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B.
Sodium
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C.
Potassium
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D.
Aluminum
Solution
Magnesium commonly forms a +2 oxidation state by losing two electrons.
Correct Answer: A — Magnesium
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