MCQ
In which of the following processes energy is absorbed?
- A$Cl + e^- \to Cl^-$
- ✓$O^- + e^- \to O^{2-}$
- C$O^{2-} - e^- \to O^-$
- D$Na^+ + e^- \to Na$
✓
Answer
Correct option: B.
$O^- + e^- \to O^{2-}$
b
$O ^{-}$to $O ^{2-}$ because of interelectronic repulsion, it will require energy to add an electron to its outermost shell.
$O ^{-}$to $O ^{2-}$ because of interelectronic repulsion, it will require energy to add an electron to its outermost shell.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of following statement is incorrect :
In the lewis dot structure for $\mathrm{NO}_2{ }^{-}$, total number of valence electrons around nitrogen is .......
→Which of the following species would be expected paramagnetic
The elements indicating following atomic numbers belong to same group
Butanal with dilute $NaOH$ gives
→Number of $\pi $ electrons in cyclobutadienyl anion ${({C_4}{H_4})^{ - 2}}$ is
→If the wavelength for an electron emitted from $H$ atom is $3.3 \times 10^{-10}\,m$, then energy absorbed by the electron in its ground state compared to minimum energy required for its escape from the atom, is $.......$times. (Nearest integer).
→[Given $: h =6.626 \times 10^{-34}\,Js$,Mass of electron $=9.1 \times 10^{-31}$ ]
Choose the correct option($s$) that give($s$) an aromatic compound as the major product.
→Which of the following tendencies remains unchanged on going down in the nitrogen family (Group - $V-A$) ?
→Which of the following has the highest nucleophilicity