MCQ
Which of the following arrangements shows the correct order of decreasing paramagnetism?
- A$N > Al > O > Ca$
- B$N > O > Al > Ca$
- ✓$O > N > Al > Ca$
- D$O > N > Ca > Al$
✓
Answer
Correct option: C.
$O > N > Al > Ca$
c
In a period the value of ionisation potential increases from left to right with breaks where the atoms have some what stable configuration. In this case $N$ has half filled stable orbital. Hence has highest ionisation energy. Thus the correct order is $B < C < O < N$ not $B < C < N < O$
In a period the value of ionisation potential increases from left to right with breaks where the atoms have some what stable configuration. In this case $N$ has half filled stable orbital. Hence has highest ionisation energy. Thus the correct order is $B < C < O < N$ not $B < C < N < O$
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
What will be $C-H$ bond enthalpy if
→$CH_4(g) +2O_2(g) \rightarrow CO_2(g)+2H_2O(l)\,;$ $\Delta H= -890 \,kJ$
$CO_2(g) \rightarrow C($graphite$) + O_2(g) \,;$ $\Delta H= 393 \,kJ$
$2H_2O(l) \rightarrow 2H_2(g) + O_2(g) \,;$ $\Delta H= 571 \,kJ$
$2H_2(g) \rightarrow 4H(g)\, ;$ $\Delta H= 871\, kJ$
$C($graphite$) \rightarrow C(g)\, ;$ $\Delta H= 716\, kJ$
$4.5 \,g$ of compound $A ( MW =90)$ was used to make $250\, mL$ of its aqueous solution. The molarity of the solution in $M$ is $x \times 10^{-1}$. The value of $x$ is ............ (Rounded off to the nearest integer)
→The major product of the following reaction is:
Self-ionisation of liquid ammonia occurs as, $2N{H_3} \Leftrightarrow NH_4^ + + NH_2^ - ;\,K = {10^{ - 10}}$. In this solvent, an acid might be
→Consider the following flow diagram :-
→Compound $X$ and $Y$ are respectively.
Which of the following is used for making optical instruments:
Number of moles of $MnO_4^-$ required to oxidize one mole of ferrous oxalate completely in acidic medium will be .......... $\mathrm{moles}$
→Identify the number of aromatic compounds
Which has minimum number of atoms of oxygen?
In the given conformation ${C_2}$ is rotated about ${C_2} - {C_3}$ bond anticlockwise by an angle of $120^o $ then the conformation obtained is
→