Monoclinic sulphur melts to clear mobile liquid at 119 ° C but on further heating to 160 ° C to 190 ° C , it becomes viscous. Also at 200 ° C , the viscosity again decreases, Explain.

In solid form, sulphur is made up of ring-shaped molecules of eight sulphur atoms. As the temperature increases, the sulphur starts to melt. At this point, the rings slide over each other simply because of which the liquid is movable. As the temperature is increased to 160 ° C , the ring-shaped molecules break and the chains of sulphur atoms mesh with each other, this makes the liquid seems to be viscous. Above 200 ° C , the polymer chain begins to fragment in smaller pieces and thus viscosity decreases.

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How many sulphur atoms are present in a molecule of rhombic sulphur?

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Important Questions on The p-Block Elements

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

The products

P

and

Q

of the following reaction, respectively, are

a S_{8} (s) + bNaOH (aq) ⟶ P (aq) + qQ (aq) + {rH}_{2} O

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

A mixture of

3 g

of sulphur and

12.7 g

of copper was placed in a quartz tube. The tube was sealed under vacuum and then heated to the melting. The cooled tube contains

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is _______.
(A)

α

-sulphur
(B)

β

-sulphur
(C)

S_{2}

-form

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Match the following

Column - 1

Type of sulphur

Column - 2

Property

(A)

α

- Sulphur
(B)

S_{2}

(C)

β

- Sulphur

(I) soluble in

{CS}_{2}

(II) soluble in

H_{2} O

(III) Puckered ring
(IV) Paramagnetic
(V) Chair form

The correct match is:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Given below are two statements:

Statement I : $α$ and $β$ forms of sulphur can change reversibly between themselves with slow heating or slow cooling.

Statement II : At room temperature the stable crystalline form of sulphur is monoclinic sulphur.

In the light of the above statements, choose the correct answer from the options given below:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

{CS}_{2}

can separate a mixture of:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Identify the mismatch.

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Correct statement about allotropy of sulphur is :

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Draw the structure of

S_{8}

molecule.

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

How many atoms are packed differently in cyclic form in an allotrope of monoclinic Sulphur?

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

How the atoms of sulphur are arranged in its molecule? Show by a diagram.

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Monoclinic sulphur melts to clear mobile liquid at

119 ° C

but on further heating to

160 ° C

190 ° C,

it becomes viscous. Also at

200 ° C,

the viscosity again decreases, Explain.

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Identify the incorrect statement:

MEDIUM

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Sulphur can form $S_{2}, S_{6}, S_{8}$ and $S_{n}$ but oxygen forms only $O_{2}$ and $O_{3} .$ This is due to

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Which of the following elements shows the highest number of allotropes?

HARD

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Which of following is a method for preparation of Engel's sulphur?

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Which among the following statements are correct?
(a) Rhombic sulphur transforms to monoclinic sulphur when heated above

369 K

.
(b) Solution of roll sulphur in

{CS}_{2}

, on evaporation gives the crystals of rhombic suiphur.
(c) Both rhombic and monoclinic sulphur have

S_{8}

molecules.
(d) Both rhombic and monoclinic sulphur are soluble in carbon disulphide.

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

The number of

S

atoms in puckered ring structure of rhombic sulphur is____.

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Crown shape of

S_{8}

molecule is present in:

EASY

Chemistry>Inorganic Chemistry>The p-Block Elements>Allotropes of Sulphur

Which of the following elements shows highest number of allotropes:

How many sulphur atoms are present in a molecule of rhombic sulphur?

Important Questions on The p-Block Elements

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