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Chemistry Class 10 Chapter 16 - Chemical Industries - 3
1.
The process of separating a metal from its ore and preparing it for use is known as?
Allergy
Metallurgy
Pulverization
None of these
2.
The use of a magnet to remove mineral from the ore is known as?
Cyclone separation
Magnetic separation
Roasting
Extraction
3.
The conversion of minerals to oxide by heating in air at temperature below their melting point is known as?
Floating
Smelting
Corrosion
Roasting
4.
The method to reduce metal ions to free metal is known as?
Floating
Roasting
Concentration
Smelting
5.
Which one of the following is a reducing agent?
All of these
Hydrogen
Carbon monoxide
Coke
6.
Blister copper contains ___ pure CU?
97 to 99 %
50 to 60 %
40 to 50 %
10 to 20 %
7.
In electro-refining, the impure metal acts as?
None of thes
Anode
Both of these
Cathode
8.
Which one of the following is soda ash?
Mg CO
3
Na
2
CO
3
Ca CO
3
Na CO
3
9.
The continous process in which the sodium carbonate is manufactured is known as?
Solvay process
Smelting
Roasting
Habberbosch process
10.
Brine is reffered to the concentrated?
Potasium chloride solution
Sodium chloride solution
Magnesium chloride solution
Calcium chloride solution
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