Home / IB DP Chemistry Topic 8. Acids and bases – 8.5 Acid deposition HL Paper 1

IB DP Chemistry Topic 8. Acids and bases – 8.5 Acid deposition HL Paper 1

Question

Which causes acid deposition?

A SO_2

B SiO_2

C SrO

D CO_2

▶️Answer/Explanation

Ans: A

Acid deposition forms when sulfur dioxide (SO2) and nitrogen oxides (NOx) combine with moisture in the atmosphere to produce sulfuric acid and nitric acid.

Question

Which of these oxides contribute to acid deposition?

(i) SO2

(ii) NO2

(iii) CO2

A I and II only

B I and III only

C II and III only

D I, II and III

▶️Answer/Explanation

Ans: A

Acid deposition forms when sulfur dioxide (SO2) and nitrogen oxides (NOx) combine with moisture in the atmosphere to produce sulfuric acid and nitric acid.

Question

Normal rain is?

A Slightly acidic

B Slightly basic

C Neutral

D Strongly acidic

▶️Answer/Explanation

Ans: A

Normal rain is slightly acidic with pH about 5.6 due to carbon dioxide dissolving into it forming weak carbonic acid. 

Question

Which of the following is present in maximum amount in acid deposition?

A Sulfuric acid

B Hydrochloric acid

C Carbonic acid

D Carboxylic acid

▶️Answer/Explanation

Ans: A

Acid deposition forms when sulfur dioxide (SO2) and nitrogen oxides (NOx) combine with moisture in the atmosphere to produce sulfuric acid and nitric acid.

Sulfuric acid is present in maximum amount.

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