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Match the following

List-1

List-II

A. pH of unpolluted rainwater

1. Moulded containers

B. Teflon

2. Hosepipe

C. Buna-N

3. 5.6

D. Polystyrene

4. Paints

 

5. Lubricant


1. A - 3, B - 5, C - 2, D - 1
2. A - 2, B - 4, C - 3, D - 5
3. A - 4, B - 2, C - 3, D - 1
4. A - 5, B - 2, C - 3, D - 1

1 Answer

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Best answer
Correct Answer - Option 1 : A - 3, B - 5, C - 2, D - 1

The correct answer is A - 3, B - 5, C - 2, D - 1.

  • pH is a measure of how acidic or basic a substance is.
    • The range on the pH scale goes from 0 to 14, with 7 being neutral.
    • pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. 
    • The pH of unpolluted rainwater is 5.6.
  • Teflon:
    • Teflon is a brand name of polytetrafluoroethylene (PTFE).
    • It is used to coat a variety of products because of its waterproof nature, it cuts down on friction, and creates a nonstick surface. 
    • It is used as a lubricant.
    •  
  • Buna-N:
    • It is synthetic nitrile rubber and is commonly known as Buna-N.
    • Its chemical name is acrylonitrile-butadiene rubber.
    • It is used to make molded goods, footwear, sealants, rubber items like hosepipes, and floor mats.
  • Polystyrene:
    • It is a synthetic aromatic hydrocarbon polymer.
    • Its monomer is called styrene.
    • It is used to make molded containers.

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