Advertisements
Advertisements
प्रश्न
Which one among the following metals of the 3d series has the lowest melting point?
पर्याय
Fe
Mn
Zn
Cu
उत्तर
Zn
Explanation:
Metallic bonds in zinc are weak due to the absence of unpaired electrons. As a result, zinc has the lowest melting point.
APPEARS IN
संबंधित प्रश्न
What is meant by 'disproportionation'? Give two examples of disproportionation reaction in aqueous solution.
Electronic configuration of Mn2+ is ____________.
Which of the following statements is not correct?
Assertion: \[\ce{Cu^2+}\] iodide is not known.
Reason: \[\ce{Cu^2+}\] oxidises \[\ce{I^-}\] to iodine.
Assertion: Separation of \[\ce{Zr}\] and \[\ce{Hf}\] is difficult.
Reason: Because \[\ce{Zr}\] and \[\ce{Hf}\] lie in the same group of the periodic table.
Answer the following question:
Which element of the first transition series has highest third ionisation enthalpy?
In the ground state of atomic Fe (Z = 26), the spin-only magnetic moment is ______ × 10-1 BM.
(Round off to the nearest integer).
[Given: `sqrt3 = 1.73, sqrt2 = 1.41`]
The disproportionation of \[\ce{MnO^{2-}_4}\] in acidic medium resulted in the formation of two manganese compounds A and B. If the oxidation state of Mn in B is smaller than that of A, then the spin-only magnetic moment (µ) value of B in BM is ______. (Nearest integer)
The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.
Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with H2S.
