Valency
Valency is an concept from the MPSC syllabus, tested in 2 past MPSC questions (2019, 2022). Below are those real questions with their correct answers and explanations.
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What mastering this unlocks
Chemical BondingOctet RuleMolecular structureRedox reactionsOxidation and reductionIonic BondingChemical CompoundsTetravalencyCatenation
Real questions that test this
₁₆S³² ह्या अणुमध्ये, 'M' कवचात ______ इलेक्ट्रॉन असतात.
1)2
2)6✓ Correct
3)8
4)16
Sulfur (atomic number 16) has the electronic configuration 2, 8, 6. The shells are K=2, L=8, and M=6. Therefore, the M shell contains 6 electrons.
V2O7⁴⁻ मध्ये V ची ऑक्सिडीकरण स्थिती ही ______ आहे. The oxidation state of V in V2O7⁴⁻ is _______
1)+5✓ Correct
2)-5
3)+4
4)+10
In V2O7⁴⁻, let the oxidation state of V be x. Therefore, 2(x) + 7(-2) = -4, which gives 2x - 14 = -4, so 2x = +10, and x = +5.