Consider the following statements about acetylene : I. > It is used in welding industry. II. > It is raw material for preparing plastics. III. > It is easily obtained by mixing silicon carbide and water. Of these statements :

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Q: 113 (IAS/1998)
Consider the following statements about acetylene :
I. It is used in welding industry.
II. It is raw material for preparing plastics.
III. It is easily obtained by mixing silicon carbide and water.
Of these statements :

question_subject: 

Science

question_exam: 

IAS

stats: 

0,27,41,27,8,6,27

keywords: 

{'acetylene': [0, 1, 0, 0], 'welding industry': [0, 1, 0, 0], 'silicon carbide': [0, 1, 0, 1], 'plastics': [1, 1, 0, 4], 'raw material': [2, 1, 2, 8]}

The correct statement is: I and II are correct.

Acetylene is a hydrocarbon gas with the chemical formula C2H2. It has several industrial uses, and the given statements describe some of them:

I. It is used in the welding industry: Acetylene is widely used in oxy-fuel welding and cutting processes. It provides a high-temperature flame when mixed with oxygen, which is used to melt and join metals.

II. It is a raw material for preparing plastics: Acetylene is a precursor in the production of various plastics and synthetic materials. It can undergo polymerization reactions to form polymers like polyacetylene, which is used in the production of conductive plastics.

III. It is not easily obtained by mixing silicon carbide and water: Acetylene is not obtained by mixing silicon carbide and water. The industrial production of acetylene involves the reaction of calcium carbide with water. Silicon carbide is not involved in this process.

Therefore, only statements I and II are correct.