Calculate the emf of the following cell at 25⁰C:

Zn|Zn²⁺(0.001 M) || H⁺(0.01 M) | H₂(g)(1 bar) | Pt(s)

E⁰_(zn²⁺_/Zn) = -0.76 V, E⁰_(H⁺_{/H )} = 0.00 V

(i) Which one of the following is a monosaccharide:

Starch, maltose, fructose, cellulose

(ii) What is the difference between acidic amino acids and basic amino acids?

(iii) Write the name of the vitamin whose deficiency causes bleeding of gums.

(i) Indicate the principle behind the method used for the refining of Nickel.

(ii) What is then role of dilute NaCN in extraction of Gold?

(iii) What is ‘copper matte’?

Give reasons for the following observations:

(i) A delta is formed at the meeting point of sea water and river water.

(ii) NH₃ gas adsorbs more readily than N₂ gas on the surface of charcoal.

(iii) Powdered substances are more effective adsorbents.

(i) Draw the geometrical isomers of complex [Pt(en)₂Cl₂]²⁺

(ii) On the basis of crystal field theory, write the electronic configuration for d⁴ ion, if Δ₀ > P.

(iii) Write the hybridization type and magnetic behavior of the complex [Ni(CN)₄]^2-. (Atomic number of Ni = 28)