MCQ
In a transition series, as the atomic number increases, paramagnetism
- Aincreases gradually
- Bdecreases gradually
- ✓first increases to a maximum and then decreases
- Dfirst decreases to a minimum and then increases
✓
Answer
Correct option: C.
first increases to a maximum and then decreases
c
For transition elements, with increase in atomic number electrons enter the empty d-orbitals. First they are singly occupied which increases paramagnetism until the point where all the d-orbitals are half-filled (point of maximum paramagnetism) and then they get paired which decreases paramagnetism. Hence, paramagnetism first increases till maximum then decreases.
For transition elements, with increase in atomic number electrons enter the empty d-orbitals. First they are singly occupied which increases paramagnetism until the point where all the d-orbitals are half-filled (point of maximum paramagnetism) and then they get paired which decreases paramagnetism. Hence, paramagnetism first increases till maximum then decreases.
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
The acid used in lead storage cells is
Calculate $\Delta G^o $ (in $kcal/mole$) for decomposition of $Cl_2(g)$ $ \rightleftharpoons $ $2Cl(g)$, if chlorine molecules are $50\%$ dissociated at $1000$ $K$ at a pressure of $15$ atm at equilibrium $(ln\, 20 = 2.99)$
→Which of the following compound will give positive iodoform test
How many bridging oxygen atoms are present in $P_4O_{10}$ ?
→Excess of $aq. NH_3$ can dissolve
→An aqueous solution of $CoC{l_2}$ on addition of excess of concentrated $ HCl $ turns blue due to formation of
→The catalyst used in the contact process is
Identify product and name of reaction.
Serine $(HOCH_2CH(NH_2)COOH)$ is an essential amino acid. The correct Fisher projection of serine is
→Dry air was passed successively through a solution of $5\,gm$ of a solute in $80gm$ of water and then through pure water. The loss in weight of solution was $2.50\,gm$ and that of pure solvent $0.04\,gm$. What is the molecular weight of the solute
→