Group 14 Elements

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JEE Advanced 2020

Choose the correct statement(s) among the following.

SnCl_{2} \cdot 2 H_{2} O

is a reducing agent.

(B)

SnO_{2}

reacts with KOH to form

K_{2} [Sn(OH)_{6}]

(C)

A solution of

PbCl_{2}

in HCl contains

Pb^{2 +}

and

Cl^{-}

ions.

(D)

The reaction of

Pb_{3} O_{4}

with hot dilute nitric acid to give

PbO_{2}

is a redox reaction.

JEE Advanced 2015

LEVELJEE Main

Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination, respectively, are

(A)

CH_{3} SiCl_{3}

and

Si(CH_{3})_{4}

(B)

(CH_{3})_{2} SiCl_{2}

and

(CH_{3})_{3} SiCl

(C)

(CH_{3})_{2} SiCl_{2}

and

CH_{3} SiCl_{3}

(D)

SiCl_{4}

and

(CH_{3})_{3} SiCl

JEE Advanced 2019

LEVELJEE Advanced

A tin chloride $Q$ undergoes the following reactions (not balanced) $Q + Cl^{-} \to X$ $Q + Me_{3} N \to Y$ $Q + CuCl_{2} \to Z + CuCl$ $X$ is a monoanion having pyramidal geometry. Both $Y$ and $Z$ are neutral compounds. Choose the correct option(s).

* Multiple Correct Options

(A)

The central atoms in

X

sp^{3}

hybridized

(B)

The oxidation state of the central atom in

Z

+ 2

(C)

The central atom in

Z

has one lone pair of electrons

(D)

There is a coordinate bond in

Y

JEE Main 2023

LEVELJEE Main

The stoichiometric reaction of $516 g$ of dimethyldichlorosilane with water results in a tetrameric cyclic product $X$ in $75%$ yield. The weight (in g) of $X$ obtained is_______. [Use, molar mass ( $g mol^{- 1}$ ): $H = 1, C = 12, O = 16, Si = 28, Cl = 35.5$ ]

LEVELJEE Main

The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence

(A)

G e X_{2} < S i X_{2} < S n X_{2} < P b X_{2}

(B)

S i X_{2} < G e X_{2} < P b X_{2} < S n X_{2}

(C)

S i X_{2} < G e X_{2} < S n X_{2} < P b X_{2}

(D)

P b X_{2} < S n X_{2} < G e X_{2} < S i X_{2}

LEVELJEE Main

A metal, $M$ forms chlorides in its $+ 2$ and $+ 4$ oxidation states. Which of the following statements about these chlorides is correct?

(A)

M C l_{2}

is more volatile than

M C l_{4}

(B)

M C l_{2}

is more soluble in anhydrous ethanol than

M C l_{4}

(C)

M C l_{2}

is more ionic than

M C l_{4}

(D)

M C l_{2}

is more easily hydrolysed than

M C l_{4}

JEE Main 2019

LEVELJEE Main

The element that does not show catenation is

Which one of the following compounds of group-14 elements is not known?

(A)

[GeCl_{6}]^{2 -}

(B)

[Sn(OH)_{6}]^{2 -}

(C)

[SiCl_{6}]^{2 -}

(D)

[SiF_{6}]^{2 -}

LEVELJEE Main

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

(A)

R_{4} Si

(B)

R SiCl_{3}

(C)

R_{2} SiCl_{2}

(D)

R_{3} SiCl

JEE Main 2019

LEVELBoard

C_{70}

(C)

C_{60}

(D)

diamond

LEVELJEE Main

The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to

(A)

a change in the crystalline structure of tin

(B)

an interaction with nitrogen of the air at very low temperature

(C)

a change in the partial pressure of oxygen in the air

(D)

an interaction with water vapour contained in the humid air

JEE Main 2005

LEVELJEE Main

Which of the following oxides is amphoteric in character?

(A)

SnO_{2}

(B)

SiO_{2}

(C)

CO_{2}

(D)

CaO

JEE Main 2019

LEVELJEE Main

The correct order of catenation is

(A)

C > S n > S i \approx G e

(B)

S i > S n > C > G e

(C)

C > S i > G e \approx S n

(D)

G e > S n > S i > C

LEVELJEE Main

In silicon dioxide

(A)

there are double bonds between silicon and oxygen atoms

(B)

silicon atom is bonded to two oxygen atoms

(C)

each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms

(D)

each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms

LEVELJEE Main

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite

(A)

is a non-crystalline substance

(B)

is an allotropic form of diamond

(C)

has molecules of variable molecular masses like polymers

(D)

has carbon atoms arranged in large plates of rings of strongly bound carbon atoms with weak interplate bonds

JEE Main 2021

LEVELJEE Main

The incorrect statement regarding the structure of $C_{60}$ is

(A)

the six-membered rings are fused to both six and five-membered rings

(B)

each carbon atom forms three sigma bonds

(C)

the five-membered rings are fused only to six-membered rings

(D)

it contains 12 six-membered rings and 24 five-membered rings

JEE Main 2019

LEVELJEE Main

$C_{60}$ an allotrope of carbon contains

(A)

16 hexagons and 16 pentagons

(B)

20 hexagons and 12 pentagons

(C)

12 hexagons and 20 pentagons

(D)

18 hexagons and 14 pentagons

LEVELJEE Main

In view of the signs of $Δ_{r} G^{\circ}$ for the following reactions $Pb O_{2} + Pb ⟶ 2PbO, Δ_{r} G^{\circ} < 0$ $Sn O_{2} + Sn ⟶ 2SnO, Δ_{r} G^{\circ} > 0$ Which oxidation states are more characteristic for lead and tin?

(A)

For lead

+ 4

, for tin

+ 2

(B)

For lead

+ 2

, for tin

+ 2

(C)

For lead

+ 4

, for tin

+ 4

(D)

For lead

+ 2

, for tin

+ 4

JEE Main 2021

LEVELJEE Main

Water does not produce $CO$ on reacting with

(A)

CH_{4}

(B)

C

(C)

CO_{2}

(D)

C_{3} H_{8}

JEE Main 2019

LEVELJEE Main

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

(A)

(S i O_{3})^{2 -}

(B)

S i O_{2}

(C)

(S i O_{4})^{4 -}

(D)

R ∣ - S i - O - ∣ R_{n} (R = M e)

JEE Main 2019

LEVELJEE Main

The amorphous form of silica is

Correct statements among (I) to (IV) regarding silicones are: I. They are polymers with hydrophobic character. II. They are biocompatible. III. In general, they have high thermal stability and low dielectric strength. IV. Usually, they are resistant to oxidation and used as greases.

Choose the correct statement(s) among the following.

Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination, respectively, are

The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?

The element that does not show catenation is

Which one of the following compounds of group-14 elements is not known?

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

The one that is extensively used as a piezoelectric material is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The element that shows greater ability to form pπ−pπ multiple bonds, is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The C−C bond length is maximum in

The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to

Which of the following oxides is amphoteric in character?

The correct order of catenation is

In silicon dioxide

Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anomalous behaviour is that graphite

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The incorrect statement regarding the structure of C60​ is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } C60​ an allotrope of carbon contains

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Water does not produce CO on reacting with

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

The amorphous form of silica is

Correct statements among (I) to (IV) regarding silicones are: I. They are polymers with hydrophobic character. II. They are biocompatible. III. In general, they have high thermal stability and low dielectric strength. IV. Usually, they are resistant to oxidation and used as greases.

A metal, $M$ forms chlorides in its $+ 2$ and $+ 4$ oxidation states. Which of the following statements about these chlorides is correct?

The element that shows greater ability to form $p π - p π$ multiple bonds, is

The $C - C$ bond length is maximum in

The incorrect statement regarding the structure of $C_{60}$ is

$C_{60}$ an allotrope of carbon contains

Water does not produce $CO$ on reacting with