19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Assertion: 1, 3-Butadiene is the monomer for natural rubber. Reason: Natural rubber is formed through anionic addition polymerisation.
Assertion: Glypal is obtained by condensation polymerization of ethylene glycol and terephthalic acid. Reason: Glyptal is used in the manufacture of fabrics.
Assertion: Network polymers are thermosetting. Reason: Network polymers have high molecular mass.
Acrilon is a hard, horny and a high melting material. Which of the following represents its structure ? (a) (b) (c) (d)
Assertion: Polybutadiene is an example of chain growth polymer. Reason: Copolymerization of butadiene and styrene gives Buna-S.
Chloroprene is the monomer unit in:
Assertion: Most of the synthetic polymers are not biodegradable. Reason: Polymerisation process induces toxic character in organic molecules.
Which one of the following monomers gives the polymer neoprene on polymerization? (a) (b) (c) (d)
Which one of the following is a chain growth polymer?
The formation of which of the following polymers involves hydrolysis reaction?
Which is not a macromolecule?
Nylon threads are made up of
CF₂ = CF₂ is a monomer of
Which of the following is a polyamide?
Bakelite is obtained from phenol by reacting with
The monomer unit of given compound is:
Which of the following is fully fluorinated polymer?
Assertion: Bakelite is hard and has high melting point. Reason: Interparticle forces of attraction in it are due to H-bonding.
Assertion: Teflon has high thermal stability and chemical inertness. Reason: Teflon is a thermosetting polymer.
Which of the following properties shows a gradual decrease with an increase in atomic number across a period in the periodic table?
Consider the following statements: (I) The radius of an anion is larger than that of the parent atom. (II) The ionization energy generally increases with the increasing atomic number in a period. (III) The electronega…
For a given value of n (principal quantum number), ionization energy is highest for
The electronic configurations of the elements X, Y, Z, and J are given below. Which element has the highest metallic character?
An element with lowest ionization energy in their respective period is
Second electron affinity