MCQ
Which one of the following is expected to have largest size
- A${F^ - }$
- B${O^{ - 2}}$
- C$A{l^{ + 3}}$
- ✓${N^{ - 3}}$
✓
Answer
Correct option: D.
${N^{ - 3}}$
d
(d) Due to having three electrons atomic size increases.
(d) Due to having three electrons atomic size increases.
${F^ - } = 9 + 1 = 10$ electrons ; ${O^{ - 2}} = 8 + 2 = 10$ electrons
$Al + 3 = 13 - 3 = 10$ electrons ; ${N^{3 - }} = 7 + 3 = 10\,{e^ - }.$
Because electrostatic force between nucleus and $\bar e$ cloud is least in nitrogen.
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 the following statements regarding covalent bond is not true
The $IUPAC$ name of the compound
→Which of the following group is divalent :
Consider the reaction at $300\, K$
→${C_6}{H_6}\left( l \right) + \frac{{15}}{2}{O_2}\left( g \right) \longrightarrow 6C{O_2}\left( g \right) + 3{H_2}O\left( l \right)\,;\,\Delta H = - 3271\,kJ$
What is $\Delta U$ for the combustion of $1.5\, mole$ of benzene at $27\,^oC$. .....$ kJ$
Each of the following options contains a set of four molecules. Identify the option($s$) where all four molecules possess permanent dipole moment at room temperature.
→$(1)$ $BeCl _2, CO _2, BCl _3, CHCl _3$
$(2)$ $SO _2, C _6 H _5 Cl , H _2 Se , BrF _5$
$(3)$ $BF _3, O _3, SF _6, XeF _6$
$(4)$ $NO _2, NH _3, POCl _3, CH _3 Cl$
Atomic number of calcium is?
If on adding $FeCl_3$ solution to acidified Lassaigne solution, of organic compound a blood redcolouration is producted, it indicates the presence of
→Which one is polar molecule among the following
Which of the following is paramagnetic ?
Which ion has greatest radius in the following