Chemistry Miscellaneous (Part-2)

Total Questions: 38

21. In India, water desalination plants are located in [U.P.P.C.S. (Mains) 2007]

Correct Answer: (e) Lakshadweep & Channai
Solution:In India, the first water desalination plant was opened in 2005 at Kavaratti in the Lakshadweep islands, developed by the National Institute of Ocean Technology (NIOT). Chennai also has water desalination plants.

22. Where was the first desalination plant in India to produce one lakh liters of fresh water per day, based on low temperature thermal desalination principle, commissioned? [I.A.S. (Pre) 2008]

Correct Answer: (a) Kavaratti
Solution:In India, first water desalination plant was opened in 2005 at Kavaratti in the Lakshadweep islands. This LTTD (Low Temperature Thermal Desalination) desalination plant with a capacity of 1 lakh litre per day was developed indigenously by National Institute of Ocean Technology (NIOT). Now, Chennai also have water desalination plants.

23. Which chemical acts as a reclamation agent for alkaline soil? [U.P.P.C.S. (Spl.) (Mains) 2008]

Correct Answer: (b) Calcium Sulphate
Solution:Alkaline soils (also known as sodic soils) have a high pH and often high sodium content, which degrades soil structure and permeability. To reclaim such soils, an agent that can replace sodium ions with calcium ions and help lower the pH is needed.

Gypsum (Calcium Sulphate - CaSO₄·2H₂O) is used to reclaim highly alkaline soils by dissolving calcium, which replaces sodium, making the soil fertile.

24. Which one of the following concerns soil? [U.P.P.C.S. (Pre) (Re. Exam) 2015]

Correct Answer: (a) Edaphic
Solution:Edaphic factors are related to soil, including characteristics such as drainage, texture, and chemical properties like pH.

25. Liquid Oxygen or liquid Hydrogen is used technology in obtaining the industrial level called— [U.P.P.S.C. (GIC) 2010]

Correct Answer: (d) Cryogenics
Solution:Cryogenics is the study and use of materials including biological products at very low temperatures. Nitrogen, Hydrogen, and Oxygen in liquid form are used in many cryogenic applications. Another use of cryogenics is as cryogenic fuels for rockets, where liquid hydrogen is used as fuel and liquid oxygen (LOX) as an oxidizer.

26. Which one of the following was used as a chemical weapon in the First World War? [I.A.S. (Pre) 1997]

Correct Answer: (c) Mustard gas
Solution:Mustard gas or sulphur mustard is a chemical compound used as a chemical weapon in the First World War. Its chemical name is 'Dichlorodiethyl Sulphide'. It is a poisonous gas that can cause ulcers on the skin.

27. Which of the following is used in World War-I? [U.P. Lower Sub. (Pre) 2009]

Correct Answer: (b) Mustard gas
Solution:Sulfur mustard, commonly known as mustard gas, is a chemical warfare agent that was first used effectively in World War-I by the German army against British and Canadian soldiers near Ypres, Belgium, in 1915.

28. Mustard gas is used— [U.P.P.C.S. (Spl.) (Mains) 2008]

Correct Answer: (b) In chemical warfare
Solution:Sulfur mustard, commonly known as mustard gas, is a chemical warfare agent which was first used effectively in World War-I by the German army against British and Canadian soldiers near Ypres, Belgium in 1915.

29. Poisonous mustard gas is a: [U.P. Lower Sub. (Pre) 2009]

Correct Answer: (b) Liquid
Solution:In room temperature the poisonous mustard gas is found in liquid state. It is used as a powerful chemical weapon. Skin, eyes and lungs are mostly affected by this toxic chemical. The symptoms of this chemical started to be visible after 1-6 hours.

30. Smoke screen is used in warfare for the purpose of concealment and camouflage. Smoke screens generally consist of fine particles of— [U.P.P.C.S. (Mains) 2009]

Correct Answer: (c) Titanium oxide dispersed in air
Solution:Smokescreens generally consist of fine particles of titanium oxides. Titanium dioxide is a naturally occurring oxide of titanium. Smoke screens are clouds of smoke used in military operations to conceal movements. Zinc chloride is also used in creating smoke screens.