question_answer1) Which of the following statements is/are correct?
(I) Most synthetic fibres are obtained from coal, petroleum and natural gas. |
(II) Acrylic fibres closely resemble wool. |
(Ill) Most synthetic fibres have very high moisture absorbing capacity. |
(IV) Polyester is prepared from cellulose. |
A) I and II only done clear
B) II and III only done clear
C) IV only done clear
D) All of these done clear
View Solution play_arrowA) Wool > Silk > Nylon > Cotton done clear
B) Cotton > Silk > Nylon > Wool done clear
C) Silk > Wool > Cotton > Nylon done clear
D) Wool > Cotton > Silk > Nylon done clear
View Solution play_arrowA) Synthetic fibres catch fire very easily. done clear
B) Synthetic fibres do not absorb sweat. done clear
C) Synthetic fibres stick to the body. done clear
D) Both (b) and (c). done clear
View Solution play_arrowquestion_answer4) A brief information about three different plastics is given below :
X : Thermoplastic which can be rolled into sheets |
V : Thermoplastic which is used as a covering for electric wires. |
Z : Thermosetting which is used for making plugs and switches. Identify X, Y and Z, |
A)
X | Y | Z |
Melamine | Teflon | Bakelite |
B)
X | Y | Z |
Bakelite | Malamine | Polythene |
C)
X | Y | Z |
Polythene | Polyvinyl chloride | Bakelite |
D)
X | Y | Z |
Polyvinyl chloride | Polythene | Melamine |
question_answer5) Which of the following statements about plastics are true?
(i) All plastics do not have same arrangement of monomer units. |
(ii) Melamine resists fire and can tolerate heat better than other plastics. |
(iii) Plastics with cross-linked monomers are also known. |
(iv) Plastics have limited applications. |
A) (i) and (iii) only done clear
B) (iii) and (iv) only done clear
C) (i), (ii) and (iii) only done clear
D) (i), (iii) and (iv) only done clear
View Solution play_arrowColumn I | Column II | ||
P. | A synthetic fibre also called as artificial silk | (i) | Spandex |
Q. | A synthetic fibre also known as lycra | (ii) | Acrylic |
R. | A synthetic fibre that closely resembles wool | (iii) | Rayon |
S. | The first true synthetic fibre | (iv) | Nylon |
A) P - (iv), Q - (ii), R - (iii), S - (i) done clear
B) P - (iii), Q - (i), R - (ii), S - (iv) done clear
C) P - (ii), Q - (iii), R - (i), S - (iv) done clear
D) P - (iii), Q - (ii), R - (iv), S - (i) done clear
View Solution play_arrowA) Polyester done clear
B) Wool done clear
C) Cotton done clear
D) None of these done clear
View Solution play_arrowColumn I | Column II |
Polyester | (i) Prepared by using wood pulp |
Teflon | (ii) Used for making para chute and stockings |
Rayon | (iii) Used for making non-stick cook wares |
Nylon | (iv) Fabrics do not wrinkle easily |
A) - (iii), - (iv), - (i), - (ii) done clear
B) - (iv), - (iii), - (i), - (ii) done clear
C) - (iv), - (iii), - (ii), - (i) done clear
D) - (i), - (ii), - (iii), - (iv) done clear
View Solution play_arrowquestion_answer9) Choose the correct option for the given statements.
I. Plastics are generally good conductors of electricity. |
II. Ropes made by bake lite are used in cranes and elevators. |
III. Teflon is a special plastic on which oil and water do not stick. |
IV. Plastic is non-biodegradable, hence not environment friendly. |
A)
I-T | II-T | III-F | IV-F |
B)
I-F | II-F | III-T | IV-T |
C)
I-T | II-F | III-T | IV-F |
D)
I-F | II-T | III-F | IV-T |
question_answer10) Read the given statements and mark the appropriate answer.
Statement 1: Polyester is synthesised from petrochemicals by linking ester units. |
Statement 2: Polyester is a natural fibre. |
A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done clear
B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done clear
C) Statement 1 is true and statement 2 is false. done clear
D) Both statements 1 and 2 are false. done clear
View Solution play_arrowquestion_answer11) Which of the following is not a characteristic of plastics?
A) Plastics are poor conductors of heat. done clear
B) Plastics are insoluble in water. done clear
C) Plastics are non-inflammable. done clear
D) Plastics do not react with water and air. done clear
View Solution play_arrowquestion_answer12) See the figure given below and select the correct statements regarding polymers.
1. Figure (X) shows structure of a monomer while figure (Y) shows structure of a polymer. |
2. Small boxes in the structure represent monomers which are joined to give a polymer. |
3. Figure (X) shows structure of a linear polymer while (Y) shows structure of a cross-linked polymer. |
A) 1 and 2 only done clear
B) 1 and 3 only done clear
C) 2 and 3 only done clear
D) All are correct. done clear
View Solution play_arrowA)
P | Q | R | S |
Monomers | Polymers | Silk | Jute |
B)
P | Q | R | S |
Natural | Synthetic | Cotton | Silk |
C)
P | Q | R | S |
Polymers | Natural | Wool | Jute |
D)
P | Q | R | S |
Natural | Monomers | Jute | Wool |
question_answer14) Sneha has classified a few materials as shown in the table.
S. No. | Material | Type/Nature |
1. | Nylon | Synthetic and non-biodegradable |
2. | Jute | Natural and non-biodegradable |
3. | Coir | Synthetic and biodegradable |
4. | Wool | Natural and biodegradable |
5. | Acrylic | Blended and biodegradable |
6. | Polyester | Synthetic and non-biodegradable |
A) 1, 3 and 4 only done clear
B) 2, 4 and 5 only done clear
C) 2, 3 and 5 only done clear
D) 1, 3 and 6 only. done clear
View Solution play_arrowA)
P | Q | R | S |
Plant fibres | Animal fibres | Thermoplastics | Thermosetting |
B)
P | Q | R | S |
Animal fibres | Plant fibres | Thermosetting | Thermoplastics |
C)
P | Q | R | S |
Rayon | Animal fibres | Biodegradable | Non-biode-gradable |
D)
P | Q | R | S |
Animal fibres | Plant fibres | Non-biodegradable | Biodegradable |
A)
I-Rayon | II-Teflon | III-Terrywool |
B)
I-Nylon | II-Teflon | III-Acrylic |
C)
I-Jute | II-Melamine | III-Terrywool |
D)
I-Jute | II-Melamine | III-Acrylic |
I. Refrigerators have an insulating wool of plastics. |
II. Electric wires have a plastic coating. |
III. Chemicals are stored in plastic containers. |
IV. Parachutes are made from plastics. |
A) II, III and IV only done clear
B) III and IV only done clear
C) I only done clear
D) II only done clear
View Solution play_arrowA)
(i) | (ii) | (iii) | (iv) |
Animal cell | Cotton | Nylon | Animal fibre |
B)
(i) | (ii) | (iii) | (iv) |
Plant cell | Rayon | Silk | Artificial silk |
C)
(i) | (ii) | (iii) | (iv) |
Plant cell | Acrylic | Wool | Artificial wool |
D)
(i) | (ii) | (iii) | (iv) |
Animal cell | Silk | Rayon | Synthetic wool |
question_answer19) Read the following statements carefully.
P. I am extensively used in the healthcare industry but my one disadvantage is that I am non-biodegradable. |
Q. I am very familiar form of polyester and used for making bottles, utensils, films, wires, etc. |
R. I am artificial silk and mixed with wool to make carpets. P, Q and R are respectively |
A) PET, Rayon and Plastic done clear
B) Rayon, Plastic and PET done clear
C) Plastic, Rayon and PET done clear
D) Plastic, PET and Rayon. done clear
View Solution play_arrowColumn I | Column II |
P. Nylon | (i) Burns quickly with a smell of burning paper |
Q. Wool | (ii) Burns with sooty flame, fabric shrinks and black beads are formed |
R. Acrylic | (iii) Shrinks after exposure to flame, forms hard beads and gives a smell of burning hair |
S. Rayon | (iv) Burns slowly with a smell of burning hair |
A) P - (i), Q - (iv), R - (ii), S - (iii) done clear
B) P - (iii), Q - (iv), R - (ii), S - (i) done clear
C) P - (iv), Q - (iii), R - (i), S - (ii) done clear
D) P - (ii), Q - (iv), R - (iii), S - (i) done clear
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