I have managed to find the definition of surface tension. Surface tension is what causes the surface portion of liquid to be attracted to another surface. Based on this, I infer that polar molecues attraction is caused by surface tension. That's one question answered.
As for the other question... I suppose it would be very hard to even test it, as non-polar materials are likely to be opaque, and hence the result cannot be observed. However, if the theories are correct, liquids should not form a meniscus of any sort when they are placed in a container made of a non-polar material.
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