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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Identify A to E and also explain the reactions involved.

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प्रश्न

Identify A to E and also explain the reactions involved.

दीर्घउत्तर
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उत्तर

A = \[\ce{Cu}\]

B = \[\ce{Cu(NO3)2}\]

C = \[\ce{[Cu(NH3)4]}\]

D = \[\ce{CO2}\]

E = \[\ce{CaCO3}\]

F = \[\ce{Cu2[Fe(CN)6]}\]

G = \[\ce{Ca (HCO3)2}\]

\[\ce{CuCO3 -> CuO + CO2}\]

\[\ce{CuO + CuS -> \underset{(A)}{Cu} + SO2}\]

\[\ce{Cu + 4HNO3 (Conc) -> Cu \underset{(B)}{(NO3)2} + 2NO + 2H2O}\]

\[\ce{\underset{(B)}{Cu^2+} + NH3 -> \underset{(C)}{[Cu(NH3)4]}}\]

\[\ce{Ca(OH)2 + \underset{(D)}{CO2} -> \underset{(E)}{CaCO3} + H2O}\]

\[\ce{CaCO3 + CO2 + H2O -> Ca(HCO3)2}\]

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अध्याय 8: The d-and f-Block Elements - Multiple Choice Questions (Type - I) [पृष्ठ ११४]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 8 The d-and f-Block Elements
Multiple Choice Questions (Type - I) | Q 64 | पृष्ठ ११४

संबंधित प्रश्न

How would you account for the following: Transition metals form complex compounds.


`E_((M^(2+)/M)`

Cr Mn Fe Co Ni Cu
-0.91 -1.18 -0.44 -0.28 -0.25 -0.34

From the given data of E0 values, answer the following questions :

(1) Why is `E_(((Cu^(2+))/(Cu)))` value exceptionally positive

(2) Why is `E_(((Mn^(2+))/(Mn)))` value is highly negative as compared to other elements

(3) Which is the stronger reducing agents Cr2+ or Fe2+ ? Give Reason.


How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.


How is the variability in oxidation states of transition metals different from that of the non-transition metals? Illustrate with examples.


How would you account for the following:

The d1 configuration is very unstable in ions.


Explain why transition elements form alloys.


Transition metals with highest melting point is ____________.


Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5. What is its atomic number?


When acidified \[\ce{K2Cr2O7}\] solution is added to \[\ce{Sn^{2+}}\] salts then \[\ce{Sn^{2+}}\] changes to ______.


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Which of the following ions show higher spin only magnetic moment value?

(i) \[\ce{Ti^3+}\]

(ii) \[\ce{Mn2+}\]

(iii) \[\ce{Fe2+}\]

(iv) \[\ce{Co3+}\]


When a brown compound of manganese (A) is treated with \[\ce{HCl}\] it gives a gas (B). The gas taken in excess, reacts with \[\ce{NH3}\] to give an explosive compound (C). Identify compounds A, B and C.


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?


The halides of transition elements become more covalent with increasing oxidation state of the metal. Why?


Why are all copper halides known except that copper iodide?


Account for the following:

Sc3+ is colourless whereas Ti3+ is coloured in an aqueous solution.


Which of the following transition metals shows +1 and +2 oxidation states?


Assertion (A): Transition metals show their highest oxidation state with oxygen.

Reason (R): The ability of oxygen to form multiple bonds to metals.


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What is the oxidation state of chromium in chromate ion and dichromate ion?


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