What is the composition of Lucas reagent?

  • A
    Concentrated $HCl +$ anhydrous $ZnCl_2$
  • B
    Dilute $HCl +$ hydrated $ZnCl_2$
  • C
    Concentrated $HNO_3 +$ anhydrous $ZnCl_2$
  • D
    Concentrated $HCl +$ anhydrous $MgCl_2$

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Write the main product of the given reactions:
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$2$. $(CH_3)_2CHCH(OH)CH_3 \xrightarrow{H_2SO_4, \Delta }$

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Describe the reactions of alcohols with $(a)$ $HX$ and Lucas test,$(b)$ $PX_3$,and $(c)$ dehydration reactions.

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