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