jyotiFlame Institute

Which is the monomer of Neoprene is the following

Ans. d (8)

Which of the following polymer contains amide linkage

a. Nylon -66 b. Terylene c. Teflon d. Bakelite Ans. a (16)

In elastomer, intermolecular forces are

a. Nil b. Weak c. Strong d. Very strong Ans. b (6)

Which of the following is fully flourinated polymer

a. Neoprene b. Teflon c. Thiokol d. PVC Ans. b (5)

Orlon is a polymer of

a. Styrene b. Tetrafluoro ethylene c. Vinyl chloride d. Acrylonitrile Ans. d (15)

The plastic household crockery is prepared by using

a. Melamine and tetrafluoroethane b. Malonic acid and hexamethyleneamine c. Melamine and vinyl acetate d. Melamine and formaldehyde Ans. d (8)

Which of the following is teflon

Ans. c (8)

Which of the following has amide links

a. Protein b. Nylon c. Peptide d. All of these Ans. d (6)

Synthetic fibres like nylon- 66 are very strong because

a. They have high molecular weights and high melting points b. They have a high degree of cross- linking by strong C- C bond c. They have linear molecules consisting of very long chains d. They have linear molecules interlinked …

Acrilan is a hard, horny and a high melting material. Which of the following represents is structure

Ans. b (58)

F C2 = CF 2 is the monomer of

a. Nylon – 6 b. Buna – S c. Glyptal d. Teflon Ans. d (8)

Teryene is a

a. Polyamide b. Polyester c. Polyethlene d. Polypropylene Ans. b (9)

As the molecular weight increases the tensile strength of polymers

a. Increases b. Decreases c. Remains unchanged d. Uncertain Ans. a (15)

Which of the following is resistant to boiling aqua-regia

a. Polythene b. Perspex c. Teflon d. Bakelite Ans. c (6)

Caprolactum is used for the manufacture of

a. Nylon – 6 b. Teflon c. Terylene d. Bakelite Ans. a (7)

Alginic acid is obtained from

(a) Red algae (b) Green algae (c) Diatoms (d) Brown algae Ans. d (9)

Which of the following form contain algae

(a) Equisetum (b) Selaginella (c) Marsilea (d) None of these Ans. d (11)

In chlamydomonas the meiosis occurs in

(a) Gamete (b) Zygote (c) Sporogonium (d) Zoospore Ans. b (6)

Reserve food material of algae is

(a) Starch (b) Glycogen (c) Fat (d) Sugar Ans. a (10)

Pyrenoids in green algal cells are related to

(a) Starch formation (b) Protein storage (c) General metabolism (d) Enzyme secretion Ans. a (7)

Algae attached to stone is called

(a) Epilithic (b) Epifolic (c) Coenolithic (d) None of these Ans. a (6)

Agranal chloroplast are found in

(a) Bryophytes (b) Gymnosperms (c) Green algae (d) Angiosperms Ans. c (5)

Agar agar is obtained from

(a) Green algae (b) Red algae (c) Brown algae (d) Blue green algae Ans. b (10)

In oogamy, fertilization involves

(a) A large non-motile female gamete and a small non-motile male gamete (b) A large motile female gamete and a small non-motile male gamete (c) A small non-motile female gamete and a large motile male gamete (d) A large non-motile …

Batrachospermum is found in

(a) Marine water (b) Fresh water (c) Tree (d) Arctic zone Ans. b (8)

The thallus of Volvox is called

(a) Trichome (b) Coenobium (c) Coenocyte (d) Parenchymatous Ans. b (9)

Sea weeds are important source of

(a) Chlorine (b) Fluorine (c) Iodine (d) Bromine Ans. a (6)

Thallophyta includes

(a) Fungi and bryophyta (b) Algae and bryophyta (c) Algae, fungi and bryophyta (d) Algae and fungi Ans. d (8)

Spirogyra cells contain

(a) One chloroplast and one pyrenoid (b) One or more chloroplast, each with one pyrenoid (c) One or more chloroplast, each with many pyrenoids (d) None of the above Ans. c (9)