11.

Give reasons for the following:

Aquatic animals are more comfortable in the cold water than in warm water.

Give reasons for the following:

Elevation of the boiling point of 1 M KCl solution is nearly double than that of 1 M sugar solution.

Write the formula of the following coordination compound :
Iron(III) hexacyanoferrate (II)

What type of isomerism is exhibited by the complex [Co(NH₃)₅ Cl]SO₄?

Write the hybridisation and number of unpaired electrons in the complex [CoF₆]^3-.

Atomic No. of Co = 27

Identify the chiral molecule in the following pair :

Give reason:

E° value for a Mn³⁺/Mn²⁺ couple is much more positive than that for Fe3⁺/Fe²⁺.

Give reason:

Iron has a higher enthalpy of atomization than that of copper.

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

Write the chemical reactions involved in the process of extraction of Gold. Explain the role of dilute NaCN and Zn in this process