Alternate cis - and trans - configuration

Random cis - and trans - configuration

The correct match between item - I and item - II is : Item - I Item - II (a) Natural rubber (I) 1, 3-butadiene + styrene (b) Neoprene (II) 1, 3-butadiene (c) Buna-N (III) chloroprene (d) Buna-S (IV) Isoprene

(a)-(IV), (b)-(III), (c)-(II), (d)-(I)

(a)-(III), (b)-(IV), (c)-(I), (d)-(II)

(a)-(III), (b)-(IV), (c)-(II), (d)-(I)

(a)-(IV), (b)-(III), (c)-(I), (d)-(II)

MEDIUM

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Which country is the largest producer of bauxite in the world?

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Important Questions on Polymers

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Natural rubber has unit in its structure.

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Which one of the following structures represents the neoprene polymer?

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Which one of the following monomer is used to prepare Neoprene?

MEDIUM

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Which statement is correct?

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Natural rubber has:

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

The structure of Neoprene is :

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Which one of the following structures represents the neoprene rubber?

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Extraction of gold and silver involves leaching with

C N^{-}

ion. Silver or gold is later recovered by:

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Neoprene is a

MEDIUM

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Which of the following monomers is used in manufacture of Neoprene rubber?

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Chloroprene is used as a repeating unit for which of the following polymer.

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Cis-

1, 4

-polyisoprene is called

MEDIUM

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Styrene-butadiene elastomers (SBR) are the largest-volume synthetic rubber in the world. What is the ratio of butadiene : styrene in SBR?

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

In polymer Buna-

S :' S'

stands for:

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Match items of column-I with the items of column-II and assign the correct code:

	Column I		Column II
$(a)$	Cyanide process	$(i)$	Ultrapure $Ge$
$(b)$	Froth floatation process	$(ii)$	Dressing of $ZnS$
$(c)$	Electrolytic reduction	$(iii)$	Extraction of $Al$
$(d)$	Zone refining	$(iv)$	Extraction of $Au$
		$(v)$	Purification of $Ni$

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

The idea of froth flotation method came from a person

X

and this method is related to the process

Y

of ores.

X a n d Y,

respectivity, are:

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Which one of the following ores is best concentrated by froth flotation method?

EASY

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

Which one of the following statements is not correct?

MEDIUM

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

The correct match between item - I and item - II is :

	Item - I		Item - II
(a)	Natural rubber	(I)	1, 3-butadiene + styrene
(b)	Neoprene	(II)	1, 3-butadiene
(c)	Buna-N	(III)	chloroprene
(d)	Buna-S	(IV)	Isoprene

HARD

Chemistry>Organic Chemistry>Polymers>Natural and Synthetic Rubbers

On complete hydrogenation, natural rubber produces

Which country is the largest producer of bauxite in the world?

Important Questions on Polymers

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