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