Which type of waste has to be added to tar to create water repellant roads?
A
Paper
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B
Vegetable waste
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C
Plastics
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D
Metals
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Solution
The correct option is C Plastics The non-bio-degradable material poses a serious problem of its disposal. Newer technologies are being invented where the non-bio-degradable material like plastic and styrofoam etc are added with the coal tar which is traditionally used for making roads. Such mixing gives the added advantage of making the roads water resistant. It also reduces the wear and tear of roads.