Manganese and Its Production in India

Q. How much of Manganese is utilised to produce 1 tonne of steel?

1. 10 kg
2. 50 kg
3. 100 kg
4. 25 kg

Q.

Why ceramics are very hard?

Q. X is the fifth most abundant metal in the Earth’s crust. It can be found in large areas of the ocean floor. These occurrences are called X - nodules. The amount of X in the nodules is estimated to be much more than that in land reserves. Which of the following are valid facts about X?

1. X is used in the manufacturing of bleaching powders.
2. X improves corrosion resistance in magnesium alloys.
3. X is used to smelt iron in furnaces.
4. X has strength that is comparable to that of iron but is also super light and is known for its conductivity.

Q.

Match the columns-

Column 1	Column 2
Lithium	High tensile strength
Platinum	Used in manufacturing glass and ceramics
Rust	Metals having low density
Carbon fibre	Hydrated Iron(III) oxide
Antimony	Noble metal

Q. What kind of alloy is manganese mostly used to make?

1. Silver manganese
2. Aluminium manganese
3. Copper-manganese
4. Ferro-manganese

Q. With reference to manganese and its production, select the appropriate pairs.

1. Manganese Steel
2. Largest producer of manganese
3. Corrosion resistance
4. Self-renewing surface
5. Madhya Pradesh
6. Aluminium alloys with manganese

Q. Apart from land, manganese can be found in large areas of the ocean floor. These occurrences are called manganese.

1. veins
2. lodes
3. nodules

Q. Manganese is used to make.

1. steel
2. iron
3. magnesium
4. copper