MEDIUM
JEE Main
IMPORTANT
Earn 100

The anion/anions that make/makes the water sample unsuitable for drinking, in which ppm level concentration of  F-=10, SO42-=100, NO3-=50  is/ are:

50% studentsanswered this correctly

Important Questions on Environmental Chemistry

EASY
JEE Main
IMPORTANT

Suppose it rains during a thunderstorm. The collected rainwater has a pH value

EASY
JEE Main
IMPORTANT
Which of the following ions, if present in excess, can harm bones and teeth?
EASY
JEE Main
IMPORTANT
When huge amount of sewage is dumped into a river, the BOD will:
 
MEDIUM
JEE Main
IMPORTANT
The smog is essentially caused by the presence of :
MEDIUM
JEE Main
IMPORTANT
Which of the following is not amongst the components of photochemical smog.
EASY
JEE Main
IMPORTANT

Brown haze produced in photochemical smog is due to:

MEDIUM
JEE Main
IMPORTANT

Choose the CORRECT option in the given following statements:

(I) Clean water contains BOD value more than 5 ppm

(II) The soluble F- ion makes the enamel on teeth into much harder as it converts hydroxyapatite into much harder fluorapatite.

(III) When the pH of the rain water drops below 5.6, it is called acid rain

EASY
JEE Main
IMPORTANT
Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?