UNIT- Choose the correct answer: . c) basic Na B O + 7H O 2NaOH + 4H BO Strong base Weak acid ⇀ ↽ - - - - . d) accepts OH - from water ,releasing proton. B OH + H O B OH + H ⇀ ↽ .
b) B H nido borane : B n H +n aracno borane : B n H +n B H is not a borane . a) Aluminium . c) four There are two 3c – 2e - bonds i.e., the bonding in the bridges account for electrons. .
c) Lead . c) sp hybridised . a) + Example : CH + in which the oxidation state of carbon is + . d) SiO .
b) Si R R . a) Me SiCl . d) dry ice dry ice – solid CO in which carbon is in sp hybridized state . a) Tetrahedral .
d) Feldspar is a three dimensional silicate . a) A-b , B- , C- , D- . d) Al,Cu,Mn,Mg Al- % , Cu- % , Mn- . % , Mg- .
% . a) Metal borides . a) Al < Ga < In < Tl stability of + oxidation state increases down the group due to inert pair effect