Kerala SCERT Class 10 Chemistry Chapter 4 Production of Metals Question Answer Solution Here. Kerala Board Class 10 Students can find Here 4th Chapter Production of Metals Notes provide by our Teacher. Important Question Answer from Chapter 4 Production of Metals.
- Board- Kerala Board.
- Class – 10.
- Subject – Chemistry Part 1
- Chapter – 4
- Chapter Name – Production of Metals.
- Topic – Question Answer Solution.
Q.1) MCQ
1.) Bauxite is the ore of ————
a) Copper
b) Aluminium
c) Zinc
d) Calcium
2.) Impurities present in the ore is called ——-
a) froth
b) gangue
c) ore
d) metal
3.) Which of the following is Iron ore.
a) Bauxite
b) Haematite
c) Calamine
d) Cuprite
4.) Calamine is the ore of ———
a) Zinc
b) Calcium
c) Iron
d) Aluminium
5.) Which ores concentrated by froth floatation.
a) oxide
b) iron
c) sulphide
d) calcium
6.) Bauxite concentrated by ———-
a) hydraulic washing
b) magnetic separation
c) froth floatation
d) leaching
7.) In an electrolysis of alumina , which electrolyte solution is used.
a) molten cryolite and alumina
b) molten aluminium
c) molten NaOH
d) alumina
8.) Which of the following are the constituent elements of stainless steel.
a) Fe, Cr, Ni
b) Fe, Cr, Co
c) Fe, Cr, C
d) Fe, Cr, Ni, C
9.) The process of heating the concentrated ore in absence of air at a temperature below its melting point is known as —–
a) Calcination
b) Roasting
c) Reduction
d) Oxidation
10.) Zinc blende is concentrated by ———–
a) levigation
b) froth floatation
c) magnetic separation
d) leaching
Q.2) VERY SHORT ANSWER QUESTIONS
1.) What is the ore ? give two examples.
2.) Define gangue
3.) Define froth floatation
4.) Define calcination
5.) What is roasting
6.) Define distillation
7.) Give the uses of stainless stell.
8.) What acts as anode and cathode in electrolysis of alumina?
9.) Define alloy with examples.
Q.3) SHORT ANSWER QUESTIONS
1.) Explain the term liquation?
2.) Describe concentration of bauxite?
3.) Define metallurgy and write the different stages involved in metallurgy?
4.) What is concentration of ores and write the names of methods of concentration?
5.) What is the difference between calcination and roasting.
Q.4) LONG ANSWER QUESTIONS.
1.) Complete the table related to electrolysis of alumina?
| Anode | |
| Cathode | |
| Electrolyte | |
| Equation at anode | |
| Equation at cathode |
2.) Explain the method of obtaining pure aluminium from alumina by electrolysis.
3.) Write the uses of stainless steel, Alnico, Nichrome
ANSWER SHEET
Production of Metals
Q.1) MCQ
b) Aluminium
b) gangue
b) haematite
a) zinc
c) sulphide
d) leaching
a) molten cryolite and alumina
d) Fe, Cr, Ni, C
a) calcination
b) froth floatation
Q.2) VERY SHORT ANSWER QUESTIONS
1.) A mineral from which a metal is economically ,easily and quickly extracted is called the ore of the metal.
Example :- bauxite, haematite
2.) The impurities present in the ore is called gangue.
3.) Froth floatation is the process used when impurities are heavier than ore particles. Ore collected from the bottom. Sulphide ores usually concentrated by this method.
4.) The process of heating the concentrated ore in absence of air at a temperature below its melting point. This process is called calcination.
5.) The process of heating the concentrated ore ina current of air at a temperature below its melting point. This process is called roasting.
6.) Distillation Is the method used for refining of metals with low boiling points as zinc, cadmium, mercury.
7.)
- 1) stainless steel is used to manufacture utensils
- 2) it is used for making parts of vehicles.
8.) Anode :- carbon rods
Cathode:- carbon lining
9.) Alloy are the combination of two or more metals or of non metals
Stainless steel, Alnico, Nichrome.
Q.3) SHORT ANSWER QUESTIONS
1.) Low melting metals like tin and lead may contain other high melting metals or metal oxides as impurities. On heating , the metals on inclined surface of a furnace , the pure metal melts and flows down leaving the impurities behind. This process is called liquation.
2.) Bauxite is concentrated through leaching process. Impure bauxite is added to hot concentrated NaOH solution, where it gets convertes into sodium aluminate. Impurities are then filtered off. A small quantity of freshly prepared aluminium hydroxide ppt is added thereand diluted with water to get more amount of Al(OH)3 ppt.
3.) Metallurgy is the process of separation of a pure metals from its ore. This process is called metallurgy.
Different stages involved in metallurgy:-
- Concentration of ores.
- Extraction of metals from concentrated ores.
- Refining of metals.
4) Concentration of the ores is the process of removing the impurities from the ore obtained from earth`s crust. Depending on the nature of ore and impurities, there are different types of concentration of ores:-
- levigation or hydraulic washing
- froth floatation
- magnetic separation
- leaching
