# Aldehyde and ketone (just to learn 4)

Chemistry Level 2

Gatterman Koch aldehyde synthesis is preparation of benzaldehyde by bubbling a mixture of $$\ce{CO}$$ and hydrogen chloride through nitrobenzene or benzene and also adding to $$\ce{AlCl_3}$$ and some amt of $$\ce{CuCl_2}$$. Which of the following is true regaridng $$\ce{CuCl_2}$$?

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