Advertisements
Advertisements
प्रश्न
Assertion: \[\ce{Cu^2+}\] iodide is not known.
Reason: \[\ce{Cu^2+}\] oxidises \[\ce{I^-}\] to iodine.
विकल्प
Both assertion and reason are true, and reason is the correct explanation of the assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is not true but reason is true.
Both assertion and reason are false.
Advertisements
उत्तर
Both assertion and reason are true, and reason is the correct explanation of the assertion.
Explanation:
All halogens combine with copper to form copper halides except iodine. The reason behind this is that \[\ce{Cu^2+}\] oxidises iodide (-1) to iodine (0). Therefore, \[\ce{Cu^2+}\] iodide does not exist .Both the statements assertion and reason are correct and reason is the correct explanation of assertion.
APPEARS IN
संबंधित प्रश्न
Which is a stronger reducing agent, Cr2+ or Fe2+ and why?
What are the characteristics of the transition elements and why are they called transition elements?
Compare the stability of +2 oxidation state for the elements of the first transition series.
How would you account for the following:
The d1 configuration is very unstable in ions.
Write the factors which are related to the colour of transition metal ions.
Dissociation of H2S is suppressed in acidic medium.
Maximum magnetic moment is shown by ____________.
Highest oxidation state of manganese in fluoride is \[\ce{+4 (MnF4)}\] but highest oxidation state in oxides is \[\ce{+7 (Mn2O7)}\] because ______.
Answer the following question:
Which element of the first transition series has highest second ionisation enthalpy?
It has been observed that first ionization energy of 5 d series of transition elements are higher than that of 3d and 4d series, explain why?
The spin magnetic moment of cobalt in the compound Hg [Co(SCN)4] is:-
Which one of the following characters tie of the transition metal is associated with higher catalytic activity?
How is the variability in oxidation states of transition metals different from that of p-block elements?
The oxidation state of Fe in [Fe(CO)5] is ______.
Assertion (A): Transition metals show their highest oxidation state with oxygen.
Reason (R): The ability of oxygen to form multiple bonds to metals.
A transition element X has an electronic configuration [Ar]4s23d3. Predict its likely oxidation states.
Consider the following standard electrode potential values:
\[\ce{Sn^{2+}_{ (aq)} + 2e^- -> Sn_{(s)}}\]; E0 = −0.14 V
\[\ce{Fe^{3+}_{ (aq)} + e^- -> Fe^{2+}_{ (aq)}}\]; E0 = +0.77 V
What is the cell reaction and potential for the spontaneous reaction that occurs?
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.)
Write the ionic equation for reaction of KI with acidified KMnO4.
Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following point:
Atomic sizes
