The main pollutant of leather tanneries in the waste water is____________________?

Related Mcqs:

1. The percentage of suspended solid waste in raw water is removed by coagulation is__________________?

   A. 60 B. 70 C. 80 D. 90...

2. The medium which interact with long lived pollutant is:_____________?

   A. Source B. Receptor C. Sink D. All of them Submitted by: Said wali shah...

3. Biodegradable pollutant is:_____________?

   A. DDT B. mercury salt C. Domestic waste D. Aluminum foil Submitted by: Said wali shah...

4. Chlorination of water may be harmful if the water contains_________________?

   A. Ammonia B. Dissolved oxygen C. Carbon dixide D. All...

5. Empirical formula of chloroform is____________________?

   A. CH2 C12 B. CH3C1 C. CC14 D. CHCL3...

6. The most paramagnetic element is____________________?

   A. Iron B. Cobalt C. Chromium D. Manganese...

7. In K2Cr2O7 the oxidation number of chromium is____________________?

   A. 7 B. 6 C. -7 D. -6...

8. The correct electronic configuration of Cr is____________________?

   A. [Ar]4s23d4 B. [Ar] 4s23d4 C. [Ar]4s03d5 D. [Ar]4s13d5...

9. The metal which is used in thermite process because of its activity is____________________?

   A. iron B. copper C. aluminium D. zinc...

10. Phosphoric acid is a weak acid and its basicity is____________________?

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