Which of the following gases in the atmosphere is/are responsible for acid rains?1. Oxides of sulphur2. Oxides of nitrogen3. Oxides of carbonSelect the correct answer:

In a batch process, the reaction takes place in the presence of an acid medium. The acid is drained from the reaction vessel at the rate of 15ml/s as a result of the density difference of the acid from the reacting component. To avoid wastage of acid, it is recycled to an acid tank which has 1000 L capacity. The acid drained from the reaction vessel, picks up 50 g/L solids from the reactor. Acid is fed once again to the process from acid tank. When the process is started, the acid is almost pure in the tank as a result of filtration. As the reaction proceeds, acid in the tank gets more and more contaminated with the solids. The concentration of the solids should not exceed 100 g/L from the process point of view. The batch time is 16h. Estimate whether the concentration of the solids will exceed 100g/L during the batch reaction.

A

37.04 h

B

30.05 h

C

36.04 h

D

32.05 h

To monitor oxides of nitrogen in stack effluents, the sample containing oxides of nitrogen is passed through a flask containing solution of H2O2 in sulphuric acid. Nitric acid is formed. The nitrate ions then react with phenol-disulphonic acid to produce blue colour.

A

True

B

False

Which of the following chemicals are used to treat the instruments made out of polymers? i) Ethylene Oxide ii) Hydrochloric Acid iii) Silver Cyanide iv) Ozone v) Bleach vi) Saline Solution vii) Sulphuric Acid viii) Glutaraldehyde and Formaldehyde ix) Phthalaldehyde x) Hydrogen Peroxide xi) Nitric Acid xii) Peracetic Acid xiii) Silver xiv) Formic Acid xv) Citric Acid

A

i, ii, iii, iv, v, vi

B

ii, iv, vi, viii, x, xii

C

i, iv, v, viii, ix, x, xii, xiii

D

iii, iv, ix, xii, xv

Solution-1 containing 10% nitric acid and 20% acetic acid at the rate F combines with Solution-2 containing 20% nitric acid and 10% acetic acid at the rate D, the product formed contains 30% nitric acid and 20% acetic acid at the rate P, how many independent equations containing F, D, and P are possible?

A

1

B

2

C

3

Solution-1 containing 10% hydrochloric acid and 20% acetic acid at the rate F combines with Solution-2 containing 20% hydrochloric acid and 30% acetic acid at the rate D, the product formed contains 20% hydrochloric acid and 30% acetic acid at the rate P, how many independent equations containing F, D, and P are possible?

A

1

B

2

C

3

Which of the following statement(s) is/are correct?
1. Metallic oxides are said to be basic oxides.
2. Non-metallic oxides are basic in nature.
3. All acids have similar chemical properties.

A

Only 1 and 3

B

Only 2 and 3

C

Only 2

D

All statements are correct

What type of oxides is formed by metals? c) Oxides with pH 10 d) Amphoteric oxides

A

Oxides with pH = 7

B

Oxides with pH > -log10[1 x 10-7

C

1 x 10-7

D

1 x 10-7

Which of the following metal oxides is used to remove the sulphur oxides from flue gases?

A

Manganese oxide

B

Activated carbon

C

Magnesium oxide

D

Calcium oxide

Consider the following constituent gases of the atmosphere : 1. Argon 2. Neon 3. Helium 4.Ceirbon dioxide Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage?

A

1-3-2-4

B

1-4-2-3

C

4-2-3-1

D

2-4-1-3

Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?

A

CO₂

B

H₂

C

SO₃

D

N₂

Which of the following gases in the atmosphere is/are responsible for acid rains?
1. Oxides of sulphur
2. Oxides of nitrogen
3. Oxides of carbon
Select the correct answer:

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