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