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