Column-I | Column-II | ||
|---|---|---|---|
| a | Silicones | i | Cracking of hydrocarbons |
| b | Zeolites | ii | Light composite material for aircraft |
| c | Quartz | iii | Flux for soldering metals |
| d | Borax | iv | Waterproofing of fabrics |
| e | Boron fibres | v | Piezoelectric material |
Kepler's second law (law of areas) of planetary motion leads to law of conservation of