The term platforming is
Platinum painting
Flat sheet of platinum
Platinum manufacturing
Platinum used as a catalyst
The second and third rows of transition elements resemble each other much more than they resemble the first row. Explain why ?
The spin-only magnetic moment value of $M ^{3+}$ ion (in gaseous state) from the pairs $Cr ^{3+} / Cr ^{2+}$, $Mn ^{3+} / Mn ^{2}, Fe ^{3+} / Fe ^{2+}$ and $Co ^{3+} / Co ^{2+}$ that has negative standard electrode potential, is $B.M...........$ [Nearest integer]
Which of the following ionic species will impart colour to an aqueous solution
Assertion : Transition metals are good catalysts.
Reason : $V_2O_5$ or $Pt$ is used in the preparation of $H_2SO_4$ by contact process.
On adding excess of $N{H_3}$ solution to $CuS{O_4}$ solution, the dark blue colour is due to