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