Lead pipes are not safe for carrying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2. Lead pipes are readily corroded by___________________?

Related Mcqs:

1. Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by_________________?

   A. Dilute HCI
   B. Acetic acid
   C. Concentrated H2SO4
   D. None of these

2. Polythene (low or high density) containers are not corroded by___________________?

   A. Sulphuric acid (10%) at room temperature
   B. Nitric acid (95%) at room temperature
   C. Sulphur trioxide at 60°C
   D. Any of these

3. Platinum and silver are corroded by___________________?

   A. Caustic soda solution
   B. Phosphoric acid
   C. Sulphuric acid (10%)
   D. None of these

4. Glass is corroded by________________?

   A. Fluorine (dry or wet)
   B. Sulphuric acid
   C. Phosphoric acid
   D. None of these

5. Teflon (PTFE) is corroded by_______________?

   A. Hydrochloric acid (10%)
   B. Hydrochloric acid (95%)
   C. Sulphuric acid
   D. None of these

6. Rubber lined vessels are corroded by the action of__________________?

   A. Aqua regia
   B. Chloroform
   C. Sulphuric acid (95%)
   D. All A., B. and C.

7. Tin vessels are corroded by____________________?

   A. Anhydrous ammonia
   B. Aromatic solvents
   C. Synthetic detergent solution
   D. None of these

8. Stainless steel is not corroded by _____________________?

   A. Hydrochloric acid (10%)
   B. Nitric acid (10%)
   C. Sulphuric acid (10%)
   D. Saturated brine

9. Graphite is corroded by_________________?

   A. Sulphuric acid (10%)
   B. Sea water
   C. Hydrochloric acid
   D. None of these

10. Wood is corroded by__________________?

    A. Hydrochloric acid
    B. SO2 (dry or wet)
    C. Chlorine (dry or wet)
    D. All A., B. and C.