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