JEE-Main_2021_MT_1-9-21_S2 - Competishun – Live JEE & NEET Courses and Exam Prep

JEE MAIN 2021

1-9-21 S2

Question

Clean water could have BOD value of less than 5 ppm whereas highly polluted water could have a BOD value of 17 ppm or more.

Select the correct option:

Nickel and Aluminium

Zinc and Copper

Copper and Iron

Aluminium and Zinc

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Calamine ⇒ ZnCO3 Malachite ⇒ Cu(OH)2·CuCO3

Question Tags

JEE Main

Physics

Easy

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