No. of questions - 33
Time - 15 min
1.
Which process is used for the extraction of metals from their sulphide ores?
2.
Which among the following has highest electrical conductivity?
3.
Wolframite ore is separated from tin stone ore by the process of
4.
Stainless steel has iron and
5.
The process in which ore is heated in air below its melting point is known as:
6.
Cyanide process is used in the extraction of
7.
Main ore of aluminium is:
8.
Iron ores are dressed by:
9.
In alumino-thermite process, aluminium is used as
10.
An essential constituent of amalgam is:
11.
Which is not a mineral of aluminium?
12.
Which metal occurs in free state?
13.
Which of the following is a carbonate ore?
14.
Which of the following mineral does not contain Al?
15.
The existence of two or more crystalline forms of the same substance is called:
16.
In blast furnace, the cup and cone arrangement is used:
17.
Alloy formation gives rise to:
18.
The method of zone refining of metals is based on the principle of
19.
Slag coming out at the bottom of a blast furnace during extraction of iron from its ores, is used in making:
20.
The matte is impure substance obtained during extraction of:
21.
Which is incorrect as the uses of lime stone in industries are concerned?
22.
When pyrolusite is fused with KOH in presence of air, the fused mass becomes:
23.
Pentalandite is an ore of:
24.
Which process is used for the purification of Al metal?
25.
Mercury is transported in mental containers made up of:
26.
Mispickel is the ore of:
27.
Refractory materials are used for the construction of furnaces because they:
28.
Blood haemoglobin contains:
29.
Which element is present in pitch blende?
30.
Platinum, palladium, indium, etc., are called noble metals because:
31.
Forth floatation process for the concentration of the ores is an illustration of the practical application of
32.
Which is not a mineral?
