What is the percentage of added materials like sulphur, zinc lead etc – McqOptions

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1.	What is the percentage of added materials like sulphur, zinc lead etc in vulcanised rubber?
A.	5 – 10 %
B.	3 – 5 %
C.	4 – 8 %
D.	10 – 12 %
Answer» C. 4 – 8 %

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