Download App

Chemistry M.C.Q (1 Marks)

Polymers · MP Board (MPBSE) STD 12 Science (Madhya Pradesh - English Medium). 163 questions.

Questions · Page 4 of 4

M.C.Q (1 Marks)

MCQ 1511 Mark
$1, 3 -$ butadiene and acrylonitrile undergo $co -$ polymerization to give $.......$
  • A
    Buna $- S$
  • ✓
    Buna $- N$
  • C
    Buna $- A$
  • D
    All
Answer
Correct option: B.
Buna $- N$
Buna $- N$ is $co -$ polymer of $1, 3$ butadiene and acrylonitrile.
1, 3 - butadiene and acrylonitrile undergo co - polymerization to give
View full question & answer→
MCQ 1521 Mark
Teflon is most commonly used in:
  • A
    Making water pipes and electrical cable insulation
  • B
    Blankets and clothing
  • ✓
    Non $-$ sticky coating
  • D
    Latex paints and adhesives
Answer
Correct option: C.
Non $-$ sticky coating
Teflon is best known for its use in coating non$-$stick frying $-$ pans and other cookware, as it is hydrophobic and possesses fairly high heat resistance.
View full question & answer→
MCQ 1531 Mark
The natural rubber is the polymer of:
  • A
    $1, 3 -$ butadiene
  • B
    Polyamide
  • ✓
    Isoprene
  • D
    None of the above
Answer
Correct option: C.
Isoprene
The monomer of natural rubber is Isoprene. Polyisoprene, a polymer of isoprene $\left(\mathrm{C}_5 \mathrm{H}_8\right)$ that is the primary chemical constituent of natural rubber.
The chemical structure of isoprene can be represented as $\mathrm{CH}_2=\mathrm{C}\left(\mathrm{CH}_3\right)-\mathrm{CH}=\mathrm{CH}_2$.
View full question & answer→
MCQ 1541 Mark
Methanal and Phenol react in the presence of base to give:
  • ✓
    Bakelite
  • B
    Polyethylene
  • C
    Dacron
  • D
    Nylon $- 6,6$
Answer
Correct option: A.
Bakelite
Bakelite is formed by condensation reaction of phenol with formaldehyde, i.e., methanal.
Methanal and Phenol react in the presence of base to give:
View full question & answer→
MCQ 1551 Mark
Low density polythene is prepared by:
  • ✓
    Free radical polymerizaiton.
  • B
    Cationic polymerization.
  • C
    Anionic polymerization.
  • D
    Ziegler $-$ Natta polymerization.
Answer
Correct option: A.
Free radical polymerizaiton.
The polymerization of ethene to polythene consists of heating or exposing to light, a mixture of ethene with a small amount of benzoyl peroxide initiator.
View full question & answer→
MCQ 1561 Mark
Which of the following polymer is condensation as well as cross$-$linked polymer?
  • ✓
    Bakelite
  • B
    Nylon$-6.6$
  • C
    Nylon$-2,$Nylon$-6$
  • D
    Dacron
Answer
Correct option: A.
Bakelite
The structure of cross linked polymer, Bakelite is shown above. It is formed by condensation polymerization of Phenol and formaldehyde monomers.
Which of the following polymer is condensation as well as cross - linked polymer?
View full question & answer→
MCQ 1571 Mark
The synthetic polymer which resembles natural rubber is:
  • ✓
    Neoprene
  • B
    Buna $- S$
  • C
    Nylon
  • D
    Rayon
Answer
Correct option: A.
Neoprene
Neoprene resembles natural rubber.
Natural rubber is a linear polymer of $2-$methyl$-1, 3-$butadiene called as isoprene and Neoprene is a linear polymer of $2-$chloro$-1, 3-$butadiene called as chloroprene.
View full question & answer→
MCQ 1581 Mark
The monomer of Buna$-S$ are:
  • ✓
    Styrene and butadiene
  • B
    Isoprene and butadiene
  • C
    Vinyl chloride and Sulphur
  • D
    Butadiene.
Answer
Correct option: A.
Styrene and butadiene
Styrene and $1,3 -$ Butadiene.
Styrene$-$butadiene or styrene$-$butadiene rubber $\text{(SBR)}$ describe families of synthetic rubbers derived from styrene and butadiene $($the version developed by Goodyear is called Neolite$).$
These materials have good abrasion resistance and good ageing stability when protected by additives.
About $50\%$ of car tires are made from various types of $\text{SBR}.$ The styrene/butadiene ratio influences the properties of the polymer: with high styrene content, the rubbers are harder and less rubbery.
View full question & answer→
MCQ 1591 Mark
A high molecular weight molecule built from a large number of small molecules is called a $......$
  • A
    Monomer
  • B
    Isomer
  • ✓
    Polymer
  • D
    Tautomer
Answer
Correct option: C.
Polymer
A polymer is a large molecule composed of many repeated subunits, known as monomers. Because of their broad range of properties, both synthetic and natural polymers play an essential and ubiquitous role in everyday life.
Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers such as $\text{DNA}$ and proteins, that are fundamental to biological structure and function.
Polymers, both natural and synthetic, are created via polymerisation of many monomers. Their large molecular mass relative to small molecular compounds produces unique physical properties, including toughness, viscoelasticity and a tendency to form glasses and semicrystalline structures rather than crystals.
View full question & answer→
MCQ 1601 Mark
Which of the following monomers form biodegradable polymers?
$a. 3-$hydroxybutanoic acid $+ 3-$hydroxypentanoic acid.
$b.$ Glycine $+$ amino caproic acid.
$c.$ Ethylene glycol $+$ phthalic acid.
$d.$ Caprolactum.
  • ✓
    $a$ and $b$
  • B
    $a$ and $c$
  • C
    $b$ and $c$
  • D
    $b$ and $d$
Answer
Correct option: A.
$a$ and $b$
Poly$-\beta-$hydroxybutyrate $co-\beta-$hydroxy valerate $\text{(PHBV)}$ It is obtained by the copolymerisation of $3$ hydroxybutanoic acid and $3-$hydroxypentanoic acid$. \text{PHBV}$ is used in speciality packaging orthopaedic devices and in controlled release of drugs$. \text{PHBV}$ undergoes bacterial degradation in the environment.
Nylon$-2-$nylon $6:$ It is an alternating polyamide copolymer of glycine $\left(\mathrm{H}_2 \mathrm{N}-\mathrm{CH}_2-\mathrm{COOH}\right)$ and amino caproic acid $\left[\mathrm{H}_2 \mathrm{N}\left(\mathrm{CH}_2\right)_5 \mathrm{COOH}\right]$ and is biodegradable.
View full question & answer→
MCQ 1611 Mark
Which of the following is not a semisynthetic polymer?
  • ✓
    Cis$-$polyisoprene.
  • B
    Cellulose nitrate.
  • C
    Cellulose acetate.
  • D
    Vulcanised rubber.
Answer
Correct option: A.
Cis$-$polyisoprene.
Cis$-$polyisoprene is not a semisynthetic polymer whereas other is semisynthetic polymers.
View full question & answer→
MCQ 1621 Mark
Which of the following polymers can have strong intermolecular forces?
$A.$ Nylon.
$B.$ Polystyrene.
$C.$ Rubber.
$D.$ Polyesters.
  • A
    $A$ and $B$
  • B
    $A$ and $C$
  • C
    $B$ and $C$
  • ✓
    $A$ and $D$
Answer
Correct option: D.
$A$ and $D$
Polyamides: These polymers possessing amide linkages are important examples of synthetic fibres and are termed as nylons.
Polyesters: These are the polycondensation products of dicarboxylic acids and diols. Dacron or terylene is the best$-$known example of polyesters.
View full question & answer→
MCQ 1631 Mark
Which one of the following statements is wrong?
  • A
    The repeating monomer units in bakelite are phenol and formaldehyde.
  • B
    Low density polythene is an example of branched chain polymers.
  • C
    Homopolymer contains a single type of monomer.
  • ✓
    Vulcanizatoin is the process of heating natural rubber with carbon.
Answer
Correct option: D.
Vulcanizatoin is the process of heating natural rubber with carbon.
Vulcanization is the of heating natural rubber with sulphur in order to develop some specific qualities such as abrasion resistance, heat resistance and elasticity.
Hence, it is an incorrect statement.
View full question & answer→
Generate Paper FreeAll Polymers topics
M.C.Q (1 Marks) - Page 4 - Chemistry STD 12 Science Questions - Vidyadip