Relevant Competitive Tests:
Flexible foam (for mattresses) are usually made of _________________?
A. PVC
B. Silicone rubber
C. PolyurethanesCorrect Answer
D. Polyamides
Correct Option: C. Polyurethanes
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Which of the following is a type of sedimentary rock?Which of the following rock favors petroleum formation?DLS stands For_______?RIH stands for ________?“The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?