No. of questions - 33
Time - 15 min
1.
Main ore of aluminium is:
2.
The existence of two or more crystalline forms of the same substance is called:
3.
The process in which ore is heated in air below its melting point is known as:
4.
Which among the following has highest electrical conductivity?
5.
Which element is present in pitch blende?
6.
Cyanide process is used in the extraction of
7.
When pyrolusite is fused with KOH in presence of air, the fused mass becomes:
8.
Which of the following mineral does not contain Al?
9.
Stainless steel has iron and
10.
Which is not a mineral of aluminium?
11.
Which is incorrect as the uses of lime stone in industries are concerned?
12.
Wolframite ore is separated from tin stone ore by the process of
13.
Which of the following is a carbonate ore?
15.
Forth floatation process for the concentration of the ores is an illustration of the practical application of
16.
The matte is impure substance obtained during extraction of:
17.
Iron ores are dressed by:
18.
In alumino-thermite process, aluminium is used as
19.
Which is not a mineral?
20.
The method of zone refining of metals is based on the principle of
21.
Which process is used for the purification of Al metal?
22.
Which metal occurs in free state?
23.
Mercury is transported in mental containers made up of:
24.
An essential constituent of amalgam is:
25.
Refractory materials are used for the construction of furnaces because they:
26.
Platinum, palladium, indium, etc., are called noble metals because:
27.
In blast furnace, the cup and cone arrangement is used:
28.
Pentalandite is an ore of:
29.
Mispickel is the ore of:
30.
Alloy formation gives rise to:
31.
Which process is used for the extraction of metals from their sulphide ores?
32.
Blood haemoglobin contains:
33.
Slag coming out at the bottom of a blast furnace during extraction of iron from its ores, is used in making:
