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Solution


Q.

Match List - I with List - II.

  List - I   List - II
  Compound   Use
(A) Carbon tetrachloride (I) Paint remover
(B) Methylene chloride (II) Refrigerators and air conditioners
(C) DDT (III) Fire extinguisher
(D) Freons (IV) Non-biodegradable insecticide

 

Choose the correct answer from the options given below:                       [2024]
1 (A)-(II), (B)-(III), (C)-(I), (D)-(IV)  
2 (A)-(III), (B)-(I), (C)-(IV), (D)-(II)  
3 (A)-(I), (B)-(II), (C)-(III), (D)-(IV)  
4 (A)-(IV), (B)-(III), (C)-(II), (D)-(I)  

Ans.

(2)

(A) Until the mid 1960s, it was also widely used as a cleaning fluid, both in industry, as a degreasing agent, and in the home, as a spot remover and as fire extinguisher.

(B) Methylene chloride (CH2Cl2) is widely used as a solvent, as a paint remover, as a propellant in aerosols, and as a process solvent in the manufacture of drugs. It is also used as a metal cleaning and finishing solvent.

(C) DDT is a non-biodegradable insecticide.

(D) The chlorofluorocarbon compounds of methane and ethane are collectively known as freons. These are usually produced for aerosol propellants, refrigeration and air conditioning purposes.