MCQ practice · SSC Chemistry Board questions · Chapter 3: Structure of Matter
The A²⁺ ion of the stimulus −
- i. can give up an electron
- ii. can take up an electron
- iii. is smaller than A in size
Think it through first, then pick an option.
- a i and ii
- b i and iii
- c ii and iii
- d i, ii and iii
Answer and explanation
Correct answer: d i, ii and iii
Right. A²⁺ has 6 electrons in d: ...3d⁶, so A is Fe (26). Fe²⁺ can give up one more electron to 3d⁵ (i) or take two and be Fe (ii); with fewer electrons it is smaller than Fe (iii).
Why the other options are wrong
- a i and ii: i and ii are true, but iii is true too: having lost electrons, A²⁺ is smaller than the atom A.
- b i and iii: i and iii are true, but ii is true too: A²⁺ (Fe²⁺) can take two electrons and become A (Fe) again.
- c ii and iii: ii and iii are true, but i is true too: A²⁺ can give up one more electron and reach the half-filled 3d⁵ (A³⁺).
More board questions on this topic
- How many electrons are in the M shell of ₂₅Mn²⁺?
- The electronic configuration 1s²2s²2p⁶3s²3p⁶ is seen in −
- Which element follows the (n − 1)d¹⁰ ns¹ configuration?
- Which orbital has comparatively lower energy?
Your account is open, so all 30,000+ MCQs from every chapter are yours. Start practising SSC Chemistry →
Want to keep going?
A free account carries you on to the next questions and opens 30,000+ MCQs from every chapter. Join before launch and Chirkut bundles are 60% off.
The ones you missed, worth one more look