Match list I with list II
List I | List II | ||
| A | Siderite | I | Aluminum |
| B | Malachite | II | Iron |
| C | Calamine | III | Copper |
| D | Bauxite | IV | Zinc |
Choose the correct answer from the options given below:
A-I, B-II, C-III, D-IV
A-II, B-III, C-IV, D-I
A-IV, B-III, C-II, D-I
A-III, B-II, C-IV, D-I
the correct answer is: A-II, B-III, C-IV, D-I.
Among the following statements, choose the correct statements.
Choose the correct answer from the options given below:
Atoms of element B form hcp lattice and those of the element A occupy 2/3 rd of tetrahedral voids. What is the formula of the compound formed by the elements A and B?
Among the following statements related to ionic conductance. choose the correct statements.
Choose the correct answer from the options given below:
Select the statements that are CORRECT regarding patterns of biodiversity.
Which of the following hormone is not produced by placenta ?
List - I | List - II | ||
| A | Streptokinase | I | Blood-Cholestrol lowering agents |
| B | Cyclosporin | II | Clot Buster |
| C | Statins | III | Propionibacterium sharmanii |
| D | Swiss Cheese | IV | Immuno suppressive agent |
Which of the following option determines percolation and water holding capacity of soils ?
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.

Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –