Advertisements
Advertisements
प्रश्न
The second ionization enthalpies of chromium and manganese are 1592 and 1509 kJ/mol respectively. Explain the lower value of Mn.
Advertisements
उत्तर
Mn+ has 3d54s1 configuration and configuration of Cr+ is 3d5, therefore, ionisation enthalpy of Mn+ is lower than Cr+.
APPEARS IN
संबंधित प्रश्न
What is meant by ‘disproportionation’?
Which one of the following ions is coloured?
Account for the following :
Ti4+ is colourless whereas V4+ is coloured in an aqueous solutions.
Metallic radii of some transition elements are given below. Which of these elements will have highest density?
| Element | \[\ce{Fe}\] | \[\ce{Co}\] | \[\ce{Ni}\] | \[\ce{Cu}\] |
| Metallic radii/pm | 126 | 125 | 125 | 128 |
When \[\ce{KMnO4}\] solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because ______.
Although \[\ce{Cr^3+}\] and \[\ce{Co^2+}\] ions have same number of unpaired electrons but the magnetic moment of \[\ce{Cr^3+}\] is 3.87 B.M. and that of \[\ce{Co^2+}\] is 4.87 B.M. Why?
Reactivity of transition elements decreases almost regularly from Sc to Cu. Explain.
A violet compound of manganese (A) decomposes on heating to liberate oxygen and compounds (B) and (C) of manganese are formed. Compound (C) reacts with KOH in the presence of potassium nitrate to give compound (B). On heating compound (C) with conc. \[\ce{H2SO4}\] and \[\ce{NaCl}\], chlorine gas is liberated and a compound (D) of manganese along with other products is formed. Identify compounds A to D and also explain the reactions involved.
Which of the following statements is not correct?
Why are interstitial compounds well known for transition metals?
