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.
A block of mass 1 kg is pushed up a surface inclined to horizontal at an angle of \( 60^\circ \) by a force of 10 N parallel to the inclined surface. When the block is pushed up by 10 m along the inclined surface, the work done against frictional force is:
[Given: \( g = 10 \) m/s\( ^2 \), \( \mu_s = 0.1 \)]
A gas can be taken from A to B via two different processes ACB and ADB. When path ACB is used, \( 60 J \) of heat flows into the system and \( 30 J \) of work is done by the system. If path ADB is used, the work done by the system is \( 10 J \). The heat flow into the system in path ADB is:
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 –