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

Match the solutions given in Column I and the colours given in Column II. Column I (Aqueous solution of salt) Column II (Colour) (i) FeSOX2⋅7HX2O (a) Green (ii) NiClX2⋅4HX2O (b) Light pink

Advertisements
Advertisements

प्रश्न

Match the solutions given in Column I and the colours given in Column II.

Column I
(Aqueous solution of salt)
Column II
(Colour)
(i) \[\ce{FeSO2.7H2O}\] (a) Green
(ii) \[\ce{NiCl2.4H2O}\] (b) Light pink
(iii) \[\ce{MnCl2.4H2O}\] (c) Blue
(iv) \[\ce{CoC12,6H2O}\] (d) Pale green
(v) \[\ce{Cu2 Cl2}\] (e) Pink
  (f) Colourless
जोड़ियाँ मिलाइएँ
Advertisements

उत्तर

Column I
(Aqueous solution of salt)
Column II
(Colour)
(i) \[\ce{FeSO2.7H2O}\] (d) Pale green
(ii) \[\ce{NiCl2.4H2O}\] (a) Green
(iii) \[\ce{MnCl2.4H2O}\] (b) Light pink
(iv) \[\ce{CoC12,6H2O}\] (e) Pink
(v) \[\ce{Cu2 Cl2}\] (f) Colourless
shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: The d-and f-Block Elements - Multiple Choice Questions (Type - I) [पृष्ठ ११३]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 8 The d-and f-Block Elements
Multiple Choice Questions (Type - I) | Q 56 | पृष्ठ ११३

संबंधित प्रश्न

How would you account for the following? 

Transition metals exhibit variable oxidation states.

 


Account for the following:

Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows oxidation state of +4.


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


How would you account for the following? 

Zr (Z = 40) and Hf (Z = 72) have almost identical radii.

 


Which is the most stable oxidation state of iron?


Maximum magnetic moment is shown by ____________.


Maximum oxidation state is shown by ____________.


Which of the following statements is not correct?


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

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

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

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

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


Why EΘ values for Mn, Ni and Zn are more negative than expected?


When an oxide of manganese (A) is fused with KOH in the presence of an oxidising agent and dissolved in water, it gives a dark green solution of compound (B). Compound (B) disproportionates in neutral or acidic solution to give purple compound (C). An alkaline solution of compound (C) oxidises potassium iodide solution to a compound (D) and compound (A) is also formed. Identify compounds A to D and also explain the reactions involved.


Identify the metal and justify your answer.

Carbonyl \[\ce{M(CO)5}\]


Identify the metal and justify your answer.

\[\ce{MO3F}\]


On the basis of the figure given below, answer the following questions:

  1. Why Manganese has lower melting point than Chromium?
  2. Why do transition metals of 3d series have lower melting points as compared to 4d series?
  3. In the third transition series, identify and name the metal with the highest melting point.

Which of the following maxm magnetic moment?


Passing H2S gas into a mixture of Mn2+ and Ni2+, Cu2+, ions in an acidified aqueous solution precipitates.


The basic character of transition metals monoxide follow the order.


The number of terminal oxygen atoms present in the product B obtained from the following reactions is:

\[\ce{FeCr2O4 + Na2CO3 + O2 -> A + Fe2O3 + CO2}\]

\[\ce{A + H^+ -> B + H2O + Na^+}\]


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

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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×