Question 1: Palette 1/15

TS-EAMCET 2025 MCQ

Observe the following statements

Statement I The carbon containing components of photochemical smog are acrolein, methanal and PAN. Statement II The number of greenhouse gases in the list given below is 5 .

$ \mathrm{CH}_4, \mathrm{CO}_2, \mathrm{NO}, \mathrm{H}_2 \mathrm{O}(l), \mathrm{H}_2 \mathrm{O}(g), \mathrm{O}_2, \mathrm{O}_3 $

The correct answer is

A

Both Statements I and II are correct.

B

Both Statements I and II are not correct.

C

Statement I is correct, but Statement II is not correct.

D

Statement I is not correct, but Statement II is correct.

Question 2: Palette 2/15

TS-EAMCET 2025 MCQ

Which of the following is not the common component of photochemical smog?

A

Ozone

B

Formaldehyde

C

Acrolein

D

Sulphur dioxide

Question 3: Palette 3/15

TS-EAMCET 2025 MCQ

Which of the following is a lung irritant that can lead to an acute respiratory disease in children?

A

$\mathrm{SO}_2$

B

$\mathrm{CO}_2$

C

CO

D

$\mathrm{NO}_2$

Question 4: Palette 4/15

TS-EAMCET 2025 MCQ

In drinking water, if the maximum prescribed concentration of copper is $x \mathrm{mgdm}^{-3}$, the maximum prescribed concentration of zinc will be

A

$\frac{15}{x}$

B

$\frac{x}{15}$

C

$\frac{6}{10} x$

D

$\frac{5}{6} x$

Question 5: Palette 5/15

TS-EAMCET 2025 MCQ

Identify the correct statements from the following

I. Photochemical smog has high concentration of oxidising agents.

II. $\mathrm{NO}_2$ is present in classical smog.

III. Higher concentration of $\mathrm{SO}_2$ in air can cause stiffness of flower buds.

IV. pH of rain water is approximately 7.5 .

A

I and III

B

I and II

C

III and IV

D

II and III

Question 6: Palette 6/15

TS-EAMCET 2025 MCQ

Among the following compounds, which one is not primarily responsible for depletion of ozone layer in stratosphere?

A

NO

B

$\mathrm{CF}_2 \mathrm{Cl}_2$

C

$\mathrm{CH}_4$

D

$\mathrm{Cl}_2$

Question 7: Palette 7/15

TS-EAMCET 2024 MCQ

Eutrophication can lead to

A

decrease in nutrients

B

increase in dissolved salts

C

decrease in dissolved oxygen

D

decrease in water pollution

Question 8: Palette 8/15

TS-EAMCET 2024 MCQ

Which of the following industries generate nonbiodegradable wastes?

A

Cotton mills

B

Thermal power plants

C

Paper mills

D

Textile factories

Question 9: Palette 9/15

TS-EAMCET 2024 MCQ

Acrolein $(X)$ is one of the chemicals formed when $\mathrm{O}_3$ and $\mathrm{NO}_2$ react with unburnt hydrocarbons present in the polluted air. The structure of ' $X$ ' is

A

$\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2$

B

$\mathrm{CH}_2=\mathrm{CH}-\mathrm{CHO}$

C

$\mathrm{CH}_2=\mathrm{CH}-\mathrm{CN}$

D

$\mathrm{CH}_3 \mathrm{CO}(\mathrm{OO}) \mathrm{NO}_2$

Question 10: Palette 10/15

TS-EAMCET 2024 MCQ

Methemoglobinemia is due to

A

excess of nitrate concentration in drinking water.

B

excess of sulphate concentration in drinking water.

C

excess of fluoride concentration in drinking water.

D

excess of lead on drinking water.

Question 11: Palette 11/15

TS-EAMCET 2024 MCQ

The common components of photochemical smog are

A

$\mathrm{O}_3, \mathrm{CH}_4, \mathrm{CO}_2$

B

$\mathrm{O}_3, \mathrm{CO}_2, \mathrm{CO}$

C

$\mathrm{O}_2, \mathrm{SO}_3, \mathrm{PAN}$

D

$\mathrm{O}_3, \mathrm{NO}, \mathrm{PAN}$

Question 12: Palette 12/15

TS-EAMCET 2020 MCQ

The average atmospheric residence time is lowest for which of the given the greenhouse gas?

A

Carbon dioxide

B

Methane

C

Nitrous oxide

D

Freon

Question 13: Palette 13/15

TS-EAMCET 2020 MCQ

Acid rain is mainly caused by the emissions of which of the following gases?

I. Sulphur dioxide

II. Carbon dioxide

III. Nitrogen dioxide

IV. Methane

A

I and II

B

I, II and III

C

I and III

D

I, II, III and IV

Question 14: Palette 14/15

TS-EAMCET 2020 MCQ

Which of the following is air pollutant?

A

Pesticides

B

Phosphates

C

Biphenyls

D

Oxides of sulphur

Question 15: Palette 15/15

TS-EAMCET 2020 MCQ

Biochemical oxygen demand (BOD) is a measure of organic materials present in water, BOD value less than 5 ppm indicates a water sample to be

A

rich in dissolved oxygen

B

poor in dissolved oxygen

C

highly polluted

D

not suitable for aquatic life