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please someone provide me with the IIT papers of previous years.
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Hi dear I am providing you the papers of 2009, 2008 and 2007 4. Among cellulose, poly(vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is (A) Nylon (B) Poly(vinyl chloride) (C) Cellulose (D) Natural Rubber Sol. (D) As chain of natural rubber involves weak van der Waal force of interaction. 5. Given that the abundances of isotopes 54Fe, 56Fe and 57Fe are 5%, 90% and 5% respectively, the atomic mass of Fe is (A) 55.85 (B) 55.95 (C) 55.75 (D) 56.05
__________________ Answered By StudyChaCha Member |