Match the items in Column I with its main use listed in Column II : Column I Column II A Silica gel i . Transistor B Silicon ii . Ion-exchanger C Silicone iii . Drying agent D Silicate iv . Sealant

A - iii , B - i , C - iv , D - ii

A - iv , B - i , C - ii , D - iii

A - ii , B - i , C - iv , D - iii

A - ii , B - iv , C - i , D - iii

EASY

Earn 100

What are double chain silicates?

Important Questions on p-Block Elements - I

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Example of a three-dimensional silicate is :

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Correct statements among regarding silicones are:
$(a)$ They are polymers with hydrophobic character.
$(b)$ They are biocompatible.
$(c)$ In general, they have high thermal stability and low dielectric strength.
$(d)$ Usually, they are resistant to oxidation and used as greases.

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

The gas evolved on heating

{CaF}_{2}

and

{SiO}_{2}

with concentrated

H_{2} {SO}_{4}

, on hydrolysis gives a white gelatinous precipitate. The precipitate is:

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Among the following substituted silanes, the one which will give rise to cross-linked silicone polymer on hydrolysis is:

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Identify the correct statements

I)

Germanium exists only in traces.

II)

The order of electronegativity of

Si, Ge, Sn

Sn > Ge > Si

III)

All group

14

elements are available in solid state

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

The correct statement about silicone is

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

What is the chief constituent of pyrex glass?

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Which of the following organo-silicon compound on hydrolysis will given a three dimensional silicon ?

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

An allotrope of carbon which exhibits only two types of

C - C

bond distance of

143.5 pm

and

138.3 pm

, is

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Zeolites are shape selective structures because of

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Among the following substituted silanes, the one which will give rise to cross linked silicone polymer on hydrolysis is?

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

The basic structural unit of feldspar, zeolites mica, and asbestos is:

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Identify the correct statements from the following:

a) Silicones are hydrophobic in nature.

b) The repeating unit in silicones is

Question Image

c) In a $C_{60}$ molecule, twenty $C_{6}$ rings and twelve $C_{5}$ rings are present.

d) Dehydration of formic acid by concentrated $H_{2} {SO}_{4}$ at $100^{o} C$ gives ${CO}_{2}$ .

e) The distance between two layers in graphite is $34 pm$ .

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Match the items in Column

I

with its main use listed in Column

II

	Column $I$		Column $II$
$A$	Silica gel	$i .$	Transistor
$B$	Silicon	$ii .$	Ion-exchanger
$C$	Silicone	$iii .$	Drying agent
$D$	Silicate	$iv .$	Sealant

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Si

reacts with

{CH}_{3} Cl

573 K

in the presence of

Cu

powder to form methyl substituted chlorosilanes. Among the given methyl substituted chlorosilanes, whose yield is minimum?

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

{({CH}_{3})}_{3} SiCl

is used during polymerization of organosilicons because

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Mention any three uses of silicones.

EASY

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Identify the correct statements from the following:
(a)

{CO}_{2} (g)

is used as a refrigerant for ice cream and frozen food.
(b) The structure of

C_{60}

contains twelve six-membered carbon rings and twenty-five membered carbon rings.
(c)

ZSM - 5

, a type of zeolite, is used to convert alcohols into gasoline.
(d)

CO

is a colourless and odourless gas.

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

The element that does not show catenation is

MEDIUM

Chemistry>Inorganic Chemistry>p-Block Elements - I>Group 14 (Carbon Group) Elements

Calculate the general formula of basic unit of orthosilicates from its structure.

What are double chain silicates?

Important Questions on p-Block Elements - I

Learn and Prepare for any exam you want !