Boron family

The most abundant metal in the earth's crust is

• Aluminium

• Iron

• Copper

• Tin

Boron shows reactivity only at higher temperatures

• True

• False

[Ne]  $3s^23p^1$       is the electronic configuration of

• B

• Al

• Ga

• Tl

_________ metals do not form borides with boron

• Non -metals

• Alkaline earth metals

• Alkali metals

• Hot metals

Diborane is

•  $B_2H_6$  

•  $BH_3$  

•  $H_3BO_3$  
  

•  $B_2H_8$  
  

Boron does not react directly with hydrogen

• True

• False

Boron reacts with nitrogen at high temperatures to form

• Boron nitrate

• Diborane

• Boron nitride

• Borazole

________ is used for the identification of coloured metal ions

• Boron trifluoride

• Boric acid

• Diborane

• Borax

(a)   bonds link the molecules of boric acid

Borax is______ in nature

• Acidic

• Neutral

• Hygroscopic

• Basic