JEE Main 2019 (Online) 10th January Evening Slot | Environmental Chemistry Question 83 | Chemistry

$$C{F_2}C{l_2}\left( g \right)\,\buildrel {uv} \over \longrightarrow \mathop {\,C}\limits^ \bullet l\left( g \right) + \mathop C\limits^ \bullet {F_2}Cl\left( g \right)$$

$$C{H_4} + 2{O_3}\, \to \,3C{H_2} = O + 3{H_2}O$$

$$HOCl\left( g \right)\,\buildrel {hv} \over \longrightarrow \,\mathop O\limits^ \bullet H\left( g \right) + \mathop C\limits^ \bullet l\left( g \right)$$

JEE Main 2019 (Online) 10th January Morning Slot

MCQ (Single Correct Answer)

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Out of Syllabus

Water filled in two glasses A and B have BOD values of 10 and 20, respectively. The correct statement regarding them, is :

B is more polluted than A.

A is suitable for drinking, whereas B is not .

Both A and B are suitable for dirnking

A is more polluted than B.

JEE Main 2019 (Online) 9th January Evening Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

Which of the following conditions in drinking water causes methemoglobinemia?

> 50 ppm of lead

> 50 ppm of chloride

> 50 ppm of nitrate

> 100 ppm of sulphate

JEE Main 2019 (Online) 9th January Morning Slot

MCQ (Single Correct Answer)

-1

Out of Syllabus

A water sample has ppm level concentration of the following metals : Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable for drinking is :