What is the formula of kernite, an ore of boron?

Are all the B-H bonds in diborane equivalent? 

How will you prepare an aluminosilicate?

Give reason for Carbon has a strong tendency for catenation as compared to silicon.

How is excessive content of CO₂ responsible for global warming?

What do you understand by inert pair effect.

Give reason for The decreasing stability of +3 oxidations state with increasing atomic number in group 13

Describe the shapes of BF₃ and BH₄^-. Assign the hybridisation of boron in these species.

Explain the difference in properties of diamond and graphite on the basis of their structures.

If the starting material for the manufacture of silicons is RSiCl₃ write the structure of the product formed.

Among group 14 elements name the most electronegative element.

Elemental silicon does not form a graphite-like structure as carbon does.Given reason.

How is ultra pure elemental silicon obtained? write its importance.

What happens when boric acid is added to water?

what happens when does NaBH₄ react with iodine?

Write suitable chemical equations to show their nature.