Write notes on
(i) Electroplating
(ii) Electrorefining
(iii) Galvanic cell
(iv) Electrotyping
(v) Electrochemical series.

Write short notes on : (i) Zone refining (ii) Column chromatography

Give uses of the following metals : (i) Aluminium (ii) Copper (iii) Zinc (iv) Iron

Biodiversity loss occurs due to (i) habitat loss and fragmentation (ii) co-extinction (iii) over-exploitation (iv) alien species invasion. (a) (i) and (ii) (b) (i), (ii) and (iii) (c) (ii), (iii) and (iv) (d) (i), (ii), (iii) and (iv)

Write the location and function of the following in human testes (i) Sertoli cells (ii) Leydig cells

Explain the terms (i) Conductance (ii) Specific conductance (iii) Equivalent conductance (iv) Molar conductance.

Classify the following contraceptive measures into different methods of birth control. (i) Saheli (ii) Tubectomy (iii) Vasectomy (iv) Diaphragm (v) Cervical caps

Formulate the galvanic cell in which the following reaction takes place. Zn (s) + 2Ag^(+) ( aq) rarr Zn^(2+) (aq) + 2Ag(s) (i) Which one of its electrodes is negatively charged ? (ii) The reaction taking place at each of its electrode. (iii) The carriers of current within this cell.

Which of the following are the reasons for population explosion ? (i) Increased health facilities (ii) Rapid increase in MMR (iii) Rapid increase in IMR (iv) Rapid decrease in MMR (v) Decrease in number of people reaching reproductive age