Aluminium

Q. Dissolving Alumina in Cryolite reduces its melting point to ____________ degree Celsius.

1. 1000
2. 3000
3. 2000
4. 4000

Q. Which of the following statements is/are false regarding aluminium and aluminium smelting?

1. Aluminium is extracted from its ore called Borate.
2. Aluminium is a light metal and it is highly malleable.
3. Aluminium becomes weaker when mixed with other metals.
4. Aluminium smelting plants in the country are located in Odisha and West Bengal alone.

Q. Which ore is aluminium extracted from?

1. Bauxite
2. Hematite
3. Anthracite
4. Magnetite

Q. Which of the following statements is/are false about Aluminium and Aluminium smelting?

1. Aluminium is extracted from its ore called Borite.
2. Aluminium is a light metal and it is highly malleable.
3. Aluminium becomes weaker when mixed with other metals.
4. Aluminium smelting plants in the country are located in Odisha and West Bengal alone.

Q. A metal form two oxides. The higher oxide contains 80%metal. 0.72g of the lower oxide gave 0.8g of higher oxide when oxidised. Then the ratio of weight of the oxygen that combines with the fixed weight of the metal in the two oxides .