Newspaper can be recycled again and again how many times ?

Related Mcqs:

1. Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be_______________?

   A. 16 gmol-1
   B. 32 gmol-1
   C. 48 gmol-1
   D. 64 gmol-1

2. For a given mass of a gas at constant temperature, if the value V becomes 3 times, the pressure will becomes__________?

   A. 3P
   B. P/3
   C. 3P/T
   D. 6P

   Submitted by: Muhammad Ali Kunbhar

3. Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?

   A. NH2Cl
   B. NHCI2
   C. NCI2
   D. all of the above

4. Acid present in acid rain may be__________________?

   A. H2SO4
   B. HNO3
   C. both A and B
   D. none

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

   A. chromium III
   B. chromium IV
   C. chromium V
   D. chromium VI

6. Which substance can be used for disinfecting water ?

   A. KMnO4
   B. Alums
   C. Ozone
   D. All

7. Which of the following is not a heavy industry ?

   A. iron
   B. fertilizer
   C. paper
   D. none

8. Requirement of macronutrient per acre of the land is_________________?

   A. 5 to 200 kg
   B. 20-200 kg
   C. 200-400 kg
   D. 30-400 kg

9. Which of the following gases is the main cause of acid rain ?

   A. CO
   B. NO2
   C. both a & b
   D. none of the above

10. Which of the following factors help to measure quallity of water ?

    A. DO
    B. BOD
    C. COD
    D. all of the above