Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2013ChemistryEnvironmental ChemistryActual

Which one of following statements is not true?

Options

  1. AClean water would have a BOD value of 5 ppm
  2. BFluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up
  3. CWhen the pH of rain water is higher than 6.5 , it is called acid rain
  4. DDissolved Oxygen (DO) in cold water can reach a concentration upto 10 ppm

Correct answer

C. When the pH of rain water is higher than 6.5 , it is called acid rain

Step-by-step solution

The acid rain happens when the pH of the water drops below 5.6. Related Theory The oxides of N ₂, C and S mix with water during the precipitation. Non-metal axide + H ₂ O Acid Thus the pH of water decreases and acid rain is formed.

Practice Environmental Chemistry on Quantrex Academy →

More from Environmental Chemistry

An organic halogen compound which is used as refrigerant in refrigerators and air conditioners is 2026According to green chemistry, which of the following features is NOT favored by the catalyst? 2026Which of the following is responsible for depletion of ozone layer in stratosphere? 2026Which of the following is NOT a principle of green chemistry? 2026Which of the following is one of the 12 principles of Green Chemistry? 2026What is use of Carbon tetrachloride? 2026Which statement is not true about photochemical smog? 2023Given below are two statements : Statement I : The nutrient deficient water bodies lead to eutrophication. Statement II : Eutrophication leads to decrease in the level of oxygen in 2023 Full Environmental Chemistry list All NEET PYQs