Cassiterite is an ore of_______?

Related Mcqs:

1. A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?

   A. 74% Fe
   B. 75% Fe
   C. 77% Fe
   D. 78% Fe

   Submitted by: Muhammad Ali Kunbhar

2. In Dry cell, cathode is made up of_______?

   A. Zinc
   B. Carbon (Graphite)
   C. ZnCl²
   D. MnO²(Pyrolusite)

   Submitted by: Aamir khan Hullio

3. The ore CaSO4.H2O has the general name_______________?

   A. Gypsum
   B. Dolomite
   C. Calcite
   D. Plaster of Paris

4. The purpose of Smelting an ore is to________?

   A. Reduce it
   B. Oxidize it
   C. Obtain an alloy
   D. Separate volatile impurities

   Submitted by: Muhammad Ali Kunbhar

5. A process used for the Concentration of Ore is________?

   A. Roasting
   B. Forth flotation
   C. Electrolysis
   D. Distillation

   Submitted by: Muhammad Ali Kunbhar

6. For which of the following compounds the term empirical formula cannot be applied ?

   A. NaCl
   B. H2O
   C. CCI4
   D. It can be applied to all mentioned above

7. When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained ?

   A. 1
   B. 2
   C. 3
   D. 4

8. Which catalyst is used in contact process ?

   A. Fe2O3
   B. V2O5
   C. SO3
   D. Ag2O

9. When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields______________?

   A. Carboxylic acid
   B. Ethanoic acid
   C. Propanoic acid
   D. Butanoic acid

10. Water Gas is a mixture of two gases Hydrogen & Carbon monoxide, while separating Hydrogen gas by liquification process which one is liquefied first__?

    A. Hydrogen Gas
    B. Carbon Monoxide Gas
    C. Both at same time
    D. None of them

    Submitted by: Aamir khan Hullio