Pb 3 O 4 + 4 HNO 3 → 2 Pb NO 3 2 + PbO 2 + 2 H 2 O Which is TRUE about the lead ions in Pb 3 O 4 ?

Pb + 2 reacts with HNO 3 to give lead nitrate

Pb + 4 reacts with HNO 3 to give lead nitrate

Pb + 2 reacts with HNO 3 to give PbO 2

Pb + 4 reacts with HNO 3 to give PbO 2

MEDIUM

Earn 100

Which of the following elements has the lowest melting point?

52.17% studentsanswered this correctly

Important Questions on The p-Block Elements

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

Compound

A

used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound

A

is:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

The element that does not show catenation is

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

{Pb}_{3} O_{4} + 4 {HNO}_{3} \to 2 Pb {({NO}_{3})}_{2} + {PbO}_{2} + 2 H_{2} O

Which is TRUE about the lead ions in

{Pb}_{3} O_{4}

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

The correct order of catenation is:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

Which statement is incorrect in context with Anthracite?

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

What is the hybridization of carbon atoms in fullerene?

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

Identify the incorrect statement from the following

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

Given below are two statements :
Statement I : Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.
Statement II : The green colour observed is due to the formation of copper(I) metaborate In the light of the above statements, choose the most appropriate answer from the options given below:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

The relative order of electronegativity of

C, Ge

, and

Pb

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

The correct order of bond enthalpy (

kJ {mol}^{- 1}

) is:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

The green colour produced in the borax bead test of a chromium(III) salt is due to -

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

Which of the following statements are correct?
a) The isotope of carbon containing

7

neutrons has natural abundance of

1.1 %

b) Among the IV A group elements, Sn has the lowest melting point
c) Silicon is the

2^{nd}

(by mass) most abundant element in the earth's crust
d) Elemental carbon shows the highest electrical resistivity among the

14

group elements

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

When borax is heated with

CoO

on a platinum loop, blue coloured bead formed is largely due to

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

Among the following, the number of halide(s) which is/ are inert to hydrolysis is

(A) ${BF}_{3}$
(B) ${SiCl}_{4}$
(C) ${PCl}_{5}$
(D) ${SF}_{6}$

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

During the borax bead test with

{CuSO}_{4}

, a blue green colour of the bead was observed in oxidising flame due to the formation of

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

The alloy used in the construction of aircrafts is:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

How many five-membered and six-membered rings are present in a buckmisterfullerene

(C_{60}) ?

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

Identify the correct statements from the following.

i) Quartz is a piezoelectric material
ii) All group $14$ tetrachlorides except ${CCl}_{4}$ are easily hydrolyzed in water.
iii) The $C - C$ bond distance within the layer of graphite is $154 pm$ .
iv) ${SiO}_{2}$ is soluble in aqueous $HCl$ solution.

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

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

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Group 14 Elements: The Carbon Family

An allotrope of carbon which exhibits only two types of

C - C

bond distance of

143.5 pm

and

138.3 pm

, is

Which of the following elements has the lowest melting point?

Important Questions on The p-Block Elements

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