Advertisements
Advertisements
प्रश्न
When acidified \[\ce{K2Cr2O7}\] solution is added to \[\ce{Sn^{2+}}\] salts then \[\ce{Sn^{2+}}\] changes to ______.
पर्याय
\[\ce{Sn}\]
\[\ce{Sn^{3+}}\]
\[\ce{Sn^{4+}}\]
\[\ce{Sn+}\]
Advertisements
उत्तर
When acidified \[\ce{K2Cr2O7}\] solution is added to \[\ce{Sn^{2+}}\] salts then \[\ce{Sn^{2+}}\] changes to \[\ce{Sn^{4+}}\].
Explanation:
\[\ce{Cr2O7^{2-} + 14H^+ + 3Sn^{2+} -> 2Cr^{3+} + 3Sn^{4+} + 7H2O}\]
In the above redox reaction, oxidation of \[\ce{Sn^{2+}}\] is taking place. It gets converted to \[\ce{Sn^{4+}}\] whereas, reduction of chromium is occurring from +6 oxidation state to +3.
APPEARS IN
संबंधित प्रश्न
Which metal in the first transition series (3d series) exhibits + 1 oxidation state most frequently and why?
In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomization of zinc is the lowest, i.e., 126 kJ mol−1. Why?
Which of the 3d series of the transition metals exhibits the largest number of oxidation states and why?
Why is the highest oxidation state of a metal exhibited in its oxide or fluoride only?
How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.
The halides of transition elements become more covalent with increasing oxidation state of the metal. Why?
While filling up of electrons in the atomic orbitals, the 4s orbital is filled before the 3d orbital but reverse happens during the ionisation of the atom. Explain why?
Transition metals can act as catalysts because these can change their oxidation state. How does \[\ce{Fe(III)}\] catalyse the reaction between iodide and persulphate ions?
Fill in the blanks by choosing the appropriate word(s) from those given in the brackets:
(activation energy, Threshold energy, increased, lowered, partially, full, d-d transition, Benzoic acid, benzaldehyde)
Only those transition metal ions will be coloured which have ______ filled d-orbitals facilitating ______.
Account for the following:
In case of transition elements, ions of the same charge in a given series show progressive decrease in radius with increasing atomic number.
The product of oxidation of I– with \[\ce{MnO^{-}4}\] in alkaline medium is:-
Which of the following species has maximum magnetic momentum?
Which one of the following characters tie of the transition metal is associated with higher catalytic activity?
Which of the following ions has the maximum magnetic moment?
Account for the following:
Transition metals form alloys.
Which one among the following metals of the 3d series has the lowest melting point?
Which of the following transition metals shows +1 and +2 oxidation states?
In order to protect iron from corrosion, which one will you prefer as a sacrificial electrode, Ni or Zn? Why? (Given standard electrode potentials of Ni, Fe and Zn are -0.25 V, -0.44 V and -0.76 V respectively.)
The compounds of \[\ce{Ti^4+}\] ions are colourless due to ______.
Give a reason for the following:
Transition metals possess a great tendency to form complex compounds.
