The p-Block Ele...

Which of the following properties correctly explain the compound $$SiO_2$$?

Which of the following ions is the most stable?

The shapes and hybridisation of $$ BF_3 \,\,and \,\,{ BH }_{4  }^{-  }$$ respectively are:

An oxide X in its normal form is almost non-reactive due to very high X - O bond enthalpy. It resists the attack by halogens, hydrogen and most of acids and metals even at elevated temperatures. It is only attacked by HF and NaOH. The oxide X is :

Calcium magnesium silicate is:

Topaz, opal, agate, and onyx are precious and beautiful stones found in nature. All these are different forms of:

Which of the following is not matched correctly with its use?

Borax (sodium tetraborate) has many uses, some of which are mentioned here, except?

Silica gel is a very useful:

Spaceships have to be air-tight because in space there is no air, only vaccum. Which of the following compounds has been used for air-tight closing of the door (hatch) in lunar modules?