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ACS General Chemistry Practice MCQs
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ACS General Chemistry Practice
ACS General
MCQsChemistry
Study Guide
Practice
&ACS
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MCQs
General
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Chemistry
2026_2027
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MCQs
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,ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs.pdf
Which of the following species has the largest atomic radius?
O
O⁻
O²⁻
O⁺
O²⁻
Explanation: Adding electrons increases electron-electron repulsion and expands the
electron cloud.
ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs
, ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs.pdf
What is the correct electron configuration for Fe³⁺?
[Ar]4s²3d³
[Ar] 3d⁵
[Ar] 4s²3d⁵
[Ar] 4s¹3d⁵
[Ar] 3d⁵
Explanation: Fe is [Ar] 3d⁶. Upon losing 3 electrons (to Fe³⁺), it loses the 4s electrons
first, then one from 3d → [Ar] 3d⁵.
ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs.pdf ACS general chemistry practice MCQs