Chemistry Miscellaneous Part-3

Total Questions: 36

11. Which one of the following pairs is correctly matched? [U.P.P.C.S. (Pre) 2015]

(a) Sulphur dioxide - Teeth
(b) Fluoride pollution - Bhopal gas tragedy
(c) Methyl isocyanate - Acid rain
(d) Ozone depletion - Skin cancer

Correct Answer: (d) Ozone depletion - Skin cancer

Solution:Explanation:

Sulphur dioxide - Acid rain
Fluoride pollution - Teeth
Methyl isocyanate - Bhopal gas tragedy
Ozone depletion - Skin cancer

12. Assertion (A): Phenyl is used as a household germicide. Reason (R): Phenyl is phenol derivative and phenol is an effective germicide. [I.A.S. (Pre) 1998]

(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.

Correct Answer: (a) Both (A) and (R) are true, and (R) is the correct explanation of (A).

Solution:Phenyl is an effective germicide. It is a derivative of phenol, which has germicidal properties. Phenyl is an emulsion of light creosote oil and water with soap. Creosote oil contains carbolic acid, creosol, and other homologues of phenol which exert germicidal power.

13. Match List-I (Scientists) and List-II (Inventions) on the basis of code: [Chhattisgarh P.C.S. (Pre) 2008]

List-I	List-II
A. Rutherford	1. Powerloom
B. Alfred Nobel	2. Telephone
C. Cartwright	3. Dynamite
D. Graham Bell	4. Atom Bomb

	A	B	C	D
(a)	1	2	3	4
(b)	4	3	1	2
(c)	3	4	2	1
(d)	4	2	1	3

Correct Answer: (b)

Solution:The information in the image can be presented in the following table:

Substance	Effect/Association
Rutherford	Ernest Rutherford is known as the "father of nuclear physics." While he didn't invent the atom bomb (that was a collective effort stemming from nuclear fission research), his pioneering work on atomic structure and the discovery of the atomic nucleus laid fundamental groundwork for nuclear technology. Among the given options, if "Atom Bomb" refers to the broader concept of nuclear power/weaponry research, his contribution is most relevant to that. However, the direct invention of the atom bomb involved many scientists (like Oppenheimer for the Manhattan Project). But within the context of these options, his work is closest to the concept of atomic energy/bomb.
Alfred Nobel	Invented dynamite.
Cartwright	Edmund Cartwright invented the power loom
Graham Bell	Alexander Graham Bell invented the telephone.

"Thus it is clear that option (b) is correctly matched."

14. Match List-I with List-II and select the correct answer from the code given below: [U.P.P.C.S. (Mains) 2003]

List-I (Specification)	List-II (Date)
A. Technology Day	1. 9 August
B. Photography Day	2. 29 August
C. National Sports Day	3. 11 May
D. Nagasaki Day	4. 19 August

	A	B	C	D
(a)	3	4	2	1
(b)	4	3	2	1
(c)	4	3	1	2
(d)	3	4	1	2

Correct Answer: (a)

Solution:

Event	Date	Description
Technology Day	11 May	(Pokharan test 1998)
Photography Day	19 August
National Sports Day	29 August	(Major Dhyanchand Jayanti)
Nagasaki Day	9 August	(Nagasaki - Japan atom bomb)

15. For which branch of science U.N. has designated the year 2011? [Uttarakhand P.C.S. (Pre) 2010]

(a) The International Year of Chemistry
(b) The International Year of Astronomy
(c) The International Year of Biodiversity
(d) The International Year of Physics

Correct Answer: (a) The International Year of Chemistry

Solution:The year 2011 was declared the International Year of Forests and International Year of Chemistry by the United Nations.

2023: International Year of Millets
2024: International Year of Camelids
2025: International Year of Peace and Trust
2026: International Year of Rangelands and Pastoralists
2027: International Year of Sustainable and Resilient Tourism

16. The United Nations Framework Convention on Climate Change deals with: [60th to 62nd B.P.S.C. (Pre) 2016]

(a) Reduction in fossil fuel usage
(b) CO₂ emissions mitigation
(c) Reduction in Uranium production
(d) Greenhouse gases emissions mitigation
(e) None of the above/More than one of the above

Correct Answer: (e) None of the above/More than one of the above

Solution:The United Nations Framework Convention on Climate Change (UNFCCC) is an international environmental treaty addressing climate change. Its ultimate objective is to stabilize greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system. Therefore, it primarily deals with greenhouse gases emissions mitigation. While

CO₂

is a major greenhouse gas and fossil fuel usage contributes to

CO₂

emissions, the scope of UNFCCC is broader, covering all greenhouse gases.

17. Consider the following pairs: [I.A.S. (Pre) 2020]

International agreement / set-up	Subject
1. Alma-Ata Declaration	Healthcare of the people
2. Hague Convention	Biological and chemical weapons
3. Talanoa Dialogue	Global climate change
4. Under2 Coalition	Child rights

Which of the pairs given above is/are correctly matched?

(a) 1 and 2 only
(b) 4 only
(c) 1 and 3 only
(d) 2, 3, and 4 only

Correct Answer: (c) 1 and 3 only

Solution:

Alma-Ata Declaration was the first international declaration underlining the importance of primary healthcare, which was adopted in 1978 at the International Conference on Primary Healthcare held in Almaty (formerly Alma-Ata), Kazakhstan

Hague Convention (1980) on the civil aspects of international child abduction is a multilateral treaty that provides an expeditious method to return a child internationally abducted by a parent from one member country to another.

Talanoa Dialogue was a process designed to help countries implement and enhance their Intended Nationally Determined Contributions (INDCs: reductions in greenhouse gas emissions under the UNFCCC) by the end of 2020. Under 2 Coalition is a global community of state and regional governments committed to ambitious climate action in line with the Paris Agreement. It is a coalition of subnational governments, founded in 2015, that aims to achieve greenhouse gases emissions mitigation. Hence, only pairs of 1 and 3 are correctly matched.

18. Which of the following countries has made it mandatory to blend ethanol with gasoline? [U.P.P.C.S. (Pre) (Re. Exam) 2015]

(a) China
(b) U.K.
(c) Switzerland
(d) Brazil

Correct Answer: (d) Brazil

Solution:Since 1976, the Brazilian Government has made it mandatory to blend ethanol with gasoline and since 2007, the legal blend is around 25% ethanol and 75% gasoline.

19. Which of the following is an inorganic gaseous pollutant of air? [R.A.S./R.T.S. (Pre) (Re. Exam) 2013]

Correct Answer: (e) Hydrogen Cyanide & Hydrogen Sulphide

Solution:Among the given options, Hydrogen Cyanide and Hydrogen Sulphide are inorganic gaseous pollutants of air. Other inorganic pollutants include Carbon dioxide, Carbon monoxide, Sulphur dioxide, Nitrous oxide, and Nitrogen dioxide.

20. The chief source of Hydrogen Sulphide pollutant is: [U.P. R.O./A.R.O. (Pre) 2021]

(a) Decaying vegetation and animal matter
(b) Automobiles
(c) Oil Refineries
(d) Thermal Power Plants

Correct Answer: (a) Decaying vegetation and animal matter

Solution:Hydrogen sulphide (H₂S) is a colorless gas with the odor of rotten eggs. It is naturally formed during the decay of vegetation and animal matter and bacterial decomposition of human and animal wastes, emitted from sewage treatment facilities and landfills.

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