MPSC PYQ
Science & Technology

Octet Rule

Octet Rule is a Science & Technology concept from the MPSC syllabus, tested in 2 past MPSC questions (2019, 2021). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.

Real questions
2
Years tested
2 · 2019–2021
In context
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Asked in

20212019

What you need to know first

ValencyElectronic configuration

What mastering this unlocks

Lewis acids and basesChemical Bonding

Real questions that test this

कॅल्शियम ऑक्साईड (CaO) ची स्टेबल् ऑक्टेट मिळविण्यासाठी : In CaO, so as to achieve the stable octate:

1)कॅल्शियमच्या अणू कडून दोन इलेक्ट्रॉन ऑक्सीजनच्या अणुस जातील / Ca atom transfer its two valence electrons to the same oxygen atom✓ Correct
2)कॅल्शियमच्या अणू कडून एक इलेक्ट्रॉन ऑक्सीजनच्या अणुस जातील / Ca atom transfer its one valence electron to the same oxygen atom
3)ऑक्सीजनच्या अणू कडून दोन इलेक्ट्रॉन कॅल्शियमच्या अणुस जातील / Oxygen atom transfer its two valence electrons to the same calcium atom
4)ऑक्सीजनच्या अणू कडून एक इलेक्ट्रॉन कॅल्शियमच्या अणुस जातील / Oxygen atom transfer its one valence electron to the same calcium atom

Calcium transfers its 2 valence electrons to Oxygen, forming an ionic bond where Calcium achieves a stable octet configuration (noble gas structure).

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.

More Science & Technology concepts

IsotopesChemistryRadioactivitySound wavesTaxonomyAtomic numberAvogadro numberBiodiversityBiologyMolar massMole conceptPlant morphology
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