Q: 56 (IAS/2004)
question_subject:
Science
question_exam:
IAS
stats:
0,71,20,7,11,2,71
keywords:
{'gypsum': [0, 0, 1, 3], 'fire extinguishers': [0, 0, 3, 0], 'soda': [0, 0, 5, 5], 'quicklime': [0, 0, 1, 0], 'manufacture': [1, 0, 6, 10], 'plaster': [0, 0, 1, 0], 'glass': [0, 0, 1, 4]}
All the statements in the question are correct.
Statement 1: Baking soda, or sodium bicarbonate, is indeed used in fire extinguishers. It releases carbon dioxide gas when heated, which helps to suffocate the fire and prevent it from spreading.
Statement 2: Quicklime, or calcium oxide, is used in the manufacture of glass. It is one of the key ingredients which are melted together to produce glass.
Statement 3: Gypsum is used in the manufacture of Plaster of Paris. When gypsum is heated, it loses some of its water content and turns into Plaster of Paris, which is a quick-setting material used in construction and art.
Therefore, option 4 is the correct answer as it includes all the correct statements.