Which of the following plastics do not have cross-links between their polymer chains?
A. Nylon B. Melamine C. Terylene D. Bakelite
(a) A and B (b) B and C (c) A and C (d) C and D
(c) A and C
Which of the following plastics do not have cross-links between their polymer chains? A. Nylon B. Melamine C. Polyvinyl Chloride D. Bakelite
Which of the following plastic objects can be recycled ?
A. Electric socket B. Polythene bag C. PVC pipe D. Ashtray
(a) A and B (b) B and C (c) A and D (d) C and D
Which of the following planets show phases like the moon?
A. Venus
B. Mercury
C. Jupiter
D. Mars
(a) A and B
(b) B and C
(d) C and D
Which of the following constellations are visible in the summer season?
A. Cassiopeia
B. Orion
C. Leo Major
D. Big Bear
Which of the following has cross-linked polymer chains ?
(a) bakelite (b) polyester (c) PVC (d) nylon