Water and Soil Pollution

Interactive Feed

JEE Main 2020

LEVELBoard

The presence of soluble fluoride ion upto $1 ppm$ concentration in drinking water, is

Green chemistry in day-to-day life is in the use of

(A)

chlorine for bleaching of paper.

(B)

large amount of water alone for washing clothes.

(C)

Tetrachloroethene for laundry.

(D)

Liquified

CO_{2}

for dry cleaning of clothes.

LEVELBoard

What is DDT among the following?

Biodegradable pollutant

(D)

Non-biodegradable pollutant

JEE Main 2021

LEVELJEE Main

BOD values (in ppm) for clean water ( $A$ ) and polluted water ( $B$ ) are expected respectively

(A)

A > 50, B < 27

(B)

A > 25, B < 17

(C)

A < 5, B > 17

(D)

A > 15, B > 47

JEE Main 2016

LEVELJEE Main

The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be $1000 ppb$ , $40 ppb$ , $100 ppm$ and $0.2 ppm$ , respectively. This water is unsuitable for drinking due to high concentration of

Water samples with BOD values of 4 ppm and 18 ppm, respectively, are

(A)

clean and clean

(B)

highly polluted and clean

(C)

highly polluted and highly polluted

(D)

clean and highly polluted

JEE Main 2017

LEVELJEE Main

A water sample has ppm level concentration of following anions : $F^{-} = 10$ $S O_{4}^{2 -} = 100$ $N O_{3}^{-} = 50$ The anion/anions that make/makes the water sample unsuitable for drinking is/are

(A)

Only

N O_{3}^{-}

(B)

Both

S O_{4}^{2 -}

and

N O_{3}^{-}

(C)

Only

F^{-}

(D)

Only

S O_{4}^{2 -}

JEE Main 2020

LEVELBoard

Biochemical oxygen demand (BOD) is the amount of oxygen required (in ppm)

(A)

for the photochemical breakdown of waste present in

1 m^{3}

volume of a water body.

(B)

for sustaining life in a water body.

(C)

by anaerobic bacteria to breakdown inorganic waste present in a water body.

(D)

by bacteria to breakdown organic waste in a certain volume of a water sample.

JEE Main 2019

LEVELJEE Main

The concentration of dissolved oxygen (DO) in cold water can go upto

The condition for methemoglobinemia by drinking water is

(A)

> 50 ppm

nitrate

(B)

> 50 ppm

chloride

(C)

> 50 ppm

lead

(D)

> 100 ppm

sulphate

JEE Main 2021

LEVELJEE Main

Given below are two statements Statement I Non-biodegradable wastes are generated by the thermal power plants. Statement II Bio-degradable detergents leads to eutrophication. In the light of the above statements, choose the most appropriate answer from the option given below.

(A)

Both statements I and II are false.

(B)

Statement I is true but statement II is false.

(C)

Statement I is false but statement II is true.

(D)

Both statements I and II are true.

JEE Main 2021

LEVELJEE Main

Which one of the following statements is not correct ?

(A)

Eutrophication indicates that water body is polluted.

(B)

The dissolved oxygen concentration below 6 ppm inhibits fish growth.

(C)

Eutrophication leads to increase in the oxygen level in water.

(D)

Eutrophication leads to anaerobic conditions.

JEE Main 2019

LEVELBoard

Which is wrong with respect to our responsibility as a human being to protect our environment?

(A)

Restricting the use of vehicles

(B)

Avoiding the use of floodlighted facilities

(C)

Setting up compost tin in gardens

Water sample is called cleanest on the basis of which one of the BOD values given below

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

The maximum prescribed concentration of copper in drinking water is

(A)

5 ppm

(B)

0.5 ppm

(C)

0.05 ppm

(D)

3 ppm

JEE Main 2019

LEVELJEE Main

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

(A)

A

is more polluted than

B

(B)

A

is suitable for drinking, wherease

B

is not

(C)

Both

A

and

B

are suitable for drinking

(D)

B

is more polluted than

A

JEE Main 2020

LEVELJEE Main

The condition that indicates a polluted environment is

(A)

pH of rain water to be 5.6

C O_{2}

in the atmosphere

JEE Main 2018

LEVELJEE Main

The recommended concentration of fluoride ion in drinking water is up to $1 ppm$ as fluoride ion is required to make teeth enamel harder by converting $[3 Ca_{3} (PO_{4})_{2} \cdot Ca (OH)_{2}]$ to :

(A)

[CaF_{2}]

(B)

[3 (CaF_{2}) \cdot Ca (OH)_{2}]

(C)

[3 Ca_{3} (PO_{4})_{2} \cdot CaF_{2}]

(D)

[3 {Ca_{3} (PO_{4})_{2}} \cdot CaF_{2}]

JEE Main 2021

LEVELJEE Main

Given below are two statements. Statement I The value of the parameter "Biochemical Oxygen Demand (BOD)" is important for survival of aquatic life. Statement II The optimum value of BOD is 6.5 ppm. In the light of the above statements, choose the most appropriate answer from the options given below.

(A)

Statement I is false but statement II is true.

(B)

Both statements are true.

(C)

Statement I is true but statement II is false.

(D)

Both statements are false.

JEE Main 2021

LEVELJEE Main

Which of the following statement(s) is (are) incorrect reason for eutrophication ? A. Excess usage of fertilisers. B. Excess usage of detergents. C. Dense plant population in water bodies. D. Lack of nutrients in water bodies that prevent plant growth. Choose the most appropriate answer from the options given below.

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is

Green chemistry in day-to-day life is in the use of

What is DDT among the following?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } BOD values (in ppm) for clean water (A) and polluted water (B) are expected respectively

Water samples with BOD values of 4 ppm and 18 ppm, respectively, are

Biochemical oxygen demand (BOD) is the amount of oxygen required (in ppm)

The concentration of dissolved oxygen (DO) in cold water can go upto

The condition for methemoglobinemia by drinking water is

Given below are two statements Statement I Non-biodegradable wastes are generated by the thermal power plants. Statement II Bio-degradable detergents leads to eutrophication. In the light of the above statements, choose the most appropriate answer from the option given below.

Which one of the following statements is not correct ?

Which is wrong with respect to our responsibility as a human being to protect our environment?

Water sample is called cleanest on the basis of which one of the BOD values given below

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } 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

The maximum prescribed concentration of copper in drinking water is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Water filled in two glasses A and B have BOD values of 10 and 20, respectively. The correct statement regarding them, is

The condition that indicates a polluted environment is

The presence of soluble fluoride ion upto $1 ppm$ concentration in drinking water, is

BOD values (in ppm) for clean water ( $A$ ) and polluted water ( $B$ ) are expected respectively

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

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