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NTA Abhyas JEE Main2020Chemistryp Block Elements (Group 13 & 14)Practice

Match list I with list II and select this correct answer using the codes given below the lists. List I (Type of glass) List II (Property/use) ( p ) Borosilicate glass 1 . Very high transparency ( q ) Calcium-alkali silicate glass 2 . Cheap laboratory glass wares ( r ) Lead glass 3 . Optical glass ( s ) Soda glass 4 . Domestic glass for windows 5 . Low coefficient of expansion

Options

  1. A(p)-2, (q)-5, (r)-3, (s)-4
  2. B(p)-2, (q)-1, (r)-5, (s)-4
  3. C(p)-5, (q)-2, (r)-1, (s)-3
  4. D(p)-5, (q)-4, (r)-3, (s)-2

Correct answer

D. (p)-5, (q)-4, (r)-3, (s)-2

Step-by-step solution

A . Borosilicate glasses contains B and sometimes Al. It can withstand heat changes without cracking. Such glasses are widely used for making good quality laboratory equipments. This glass has low coefficient of expansion. B . Calcium-alkali-silicate glass is made by heating alkali metal carbonate, C a C O 3 and S i O 2 . This glass is used as domestic glass for windows and bottles. C . Most of CaO can be replaced by PbO giving lead glass, which has higher reflective index and is used for making optical parts (lens

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