Advertisements
Advertisements
प्रश्न
Account for the following:
Sc3+ is colourless whereas Ti3+ is coloured in an aqueous solution.
Account for the following:
Ti3+ is coloured whereas Sc3+ is colourless in an aqueous solution.
Advertisements
उत्तर
Sc3+: [Ar]18
Ti3+: [Ar]18 3d1
Ti3+ is coloured in an aqueous solution due to the presence of one unpaired electron, whereas Sc3+ is colourless.
APPEARS IN
संबंधित प्रश्न
Which of the following cations are coloured in aqueous solutions and why ?
Sc3+, V3+, Ti4+, Mn2+ (At. Nos. Sc = 21, V = 23, Ti = 22, Mn = 25)
Give reasons:
Transition metals show variable oxidation states.
Account for the following:
E° value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+.
The \[\ce{E^{\circ}_{(M^{2+}/M)}}\] value for copper is positive (+0.34 V). What is possible reason for this? (Hint: consider its high ΔaH° and low ΔhydH°)
Which of the following statements is not correct?
Highest oxidation state of manganese in fluoride is \[\ce{+4 (MnF4)}\] but highest oxidation state in oxides is \[\ce{+7 (Mn2O7)}\] because ______.
Why Zn, Cd and Hg are not called transition metals?
A transition element X has an electronic configuration [Ar]4s23d3. Predict its likely oxidation states.
Write the number of unpaired electrons in Cr3+.
(Atomic number of Cr = 24)
The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.
