The composition of silicon carbide :

Give one word for the following statement:

• The substance prepared by adding other metals to a base metal in appropriate proportions to obtain certain desirable properties.

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Complete the following reaction

${\mathrm{SiCl}}_4+{\mathrm{NH}}_3\stackrel{ }{\to }$

When ${SiCl}_4$ gets hydrolysed, after hydrolysis.

a. Hybridization of oxygen atom gets changed.
b. Bond angle around oxygen atom gets changed.
c. The hybridization of the silicon remains the same.

Complete the following reaction

${\mathrm{SiCl}}_4+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\stackrel{ }{\to }$