Match the species given in Column-I with the properties mentioned in C

1.	Match the species given in Column-I with the properties mentioned in Column-II.
Answer» Solution :(A)In `B_2H_6` , each B atom uses `sp^3` hybrids for bonding. Out of the four `sp^3` hybrids on each B atom, one is without an ELECTRON shown in broken lines. The terminal B-H bonds are normal 2-centre-2-electron bonds but the two bridge bonds are 3-centre-2- electron bonds. The 3-centre-2-electron bridge bonds are also referred to as banana bonds. (B) Gallium with unusually LOW MELTING point (303K), could exist in liquid state during summer. Its high boiling point (2676 K) makes it a useful material for measuring high temperatures. (C) Borax is used as a flux for SOLDERING metals, for heat, scratch and stain resistant glazed coating to earthenwares. (D) Zeolites are aluminosilicates and widely used as a catalyst in PETROCHEMICAL industries for cracking of hydrocarbons and isomerization, e.g., ZSM-5 (A type of zeolite) used to convert alcohols directly into gasoline. (E) Quartz, cristobalite and tridymite are some of the crystalline forms of silica.

Match the species given in Column-I with the properties mentioned in Column-II.