Percentage of lead in lead pencil is________?

Related Mcqs:

1. The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?

   A. Ethylene iodide
   B. Ethylene bromide
   C. Ethylene chloride
   D. Ethylene fluoride

2. Percentage of sulfuric acid in lead accumulator is__________________?

   A. 40%
   B. 25%
   C. 30%
   D. 50%

3. The average salinity of sea water is________?

   A. 3%
   B. 3.5%
   C. 2.5%
   D. 2%

   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. Basicity of orthophosphoric acid is________?

   A. 2
   B. 3
   C. 4
   D. 5

   Submitted by: Muhammad Ali Kunbhar

6. Water molecule is________?

   A. V-shaped
   B. Angular
   C. Pyramidal
   D. Triangular planer

   Submitted by: Muhammad Ali Kunbhar

7. Formula of Galena is________?

   A. PbS
   B. HgS
   C. AS2S3
   D. FeS2

   Submitted by: Muhammad Ali Kunbhar

8. The Bond Energy of H-F is________?

   A. 456kJ/mol
   B. 562kJ/mol
   C. 281kJ/mol
   D. None

   Submitted by: Naintara Mustafa

9. Lead accumulators are_______________?

   A. secondary cell
   B. primary cell
   C. voltaic cell
   D. both A & C

10. Lead battery is secondary battery the paste used in it is______________?

    A. Magnese dioxide
    B. Zinc chloride
    C. Ammonium chloride
    D. AOT

    Submitted by: Safeullah Bullo