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reaction question

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ShriyaOberoy
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PostSubject: reaction question Wed Jan 13, 2010 8:22 pm

Why do Newspapers turn yellow on prolonged exposure to the atmosphere.Answer plzzzzzzzzzz
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kool
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PostSubject: Re: reaction question Thu Feb 25, 2010 6:14 pm

answer for ur question is......
Paper is made from wood, which is made up mainly of white cellulose.
Wood also has a lot of a dark substance in it called lignin, which ends
up in the paper, too, along with the cellulose. The exposure of lignin
to air and sunlight is what turns paper yellow.
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ShriyaOberoy
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PostSubject: Re: reaction question Sat Feb 27, 2010 6:30 pm

Thanx, where'd you get that?
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kool
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PostSubject: Re: reaction question Sat Feb 27, 2010 6:50 pm

ur always welcome..................
All D BEST!!!!!!!!
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