The ore CaSO4.H2O has the general name_______________?

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. Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________?

   A. 6
   B. 8
   C. 10
   D. 4

3. 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

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

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

   Submitted by: Muhammad Ali Kunbhar

5. Cassiterite is an ore of_______?

   A. Mn
   B. Ni
   C. Sb
   D. Sn

   Submitted by: Muhammad Ali Kunbhar

6. Aldehyde and ketone have same general formula for homologous series_________________?

   A. CnH2nO2n
   B. CnH2n
   C. CnH2nO
   D. CnH2nOn+1

7. General formula of alkyne is______________?

   A. CnH2n + 2
   B. CnH2n – 2
   C. CnH2n
   D. CnH2n + 2

8. Transition elements, in general, exhibit the following properties, except one. Name that property?

   A. Variable oxidation state
   B. Natural Radioactivity
   C. Tendency to form complexes
   D. Formation of alloys

   Submitted by: Muhammad Ali Kunbhar

9. First ionization potential of alkaline earth metal is greater than alkali metals because___________________?

   A. They are more reactive
   B. They have greater atomic radii
   C. They have smaller atomic sizes
   D. All

10. In diaphragm cell hydrogen is discharged by the reduction of__________________?

    A. Water
    B. HCI
    C. Na+
    D. NaCl