Can you find what is hiding ...
[1718] Can you find what is hiding ... - Can you find what is hiding inside of this picture? - #brainteasers #riddles - Correct Answers: 25 - The first user who solved this task is Sanja Šabović
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Can you find what is hiding ...

Can you find what is hiding inside of this picture?
Correct answers: 25
The first user who solved this task is Sanja Šabović.
#brainteasers #riddles
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Most Useless Inventions


  1. Non stick Cellotape
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Carl Graebe

Born 24 Feb 1841; died 19 Jan 1927 at age 85.German organic chemist who, assisted by Carl Liebermann, synthesized (1868) the orange-red dye alizarin, which in the textile industry quickly supplanted the natural source of the dye from the madder plant root. Alizarin (dihydroscyanthraquinone) was recognized by Graebe and Liebermann, as a derivative of anthracene, a hydrocarbon contained in coal-tar. Also in 1868, they elaborated a method for preparing it commercially from anthracene. Upon this, one of the early German dyestuff products, arose rapidly a great chemical industry. Graebe also introduced the chemical terms "ortho," "meta," and "para," well known to organic chemistry students, which indicate the position of groups attached to a benzene ring.
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