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How many of the following metal chloride...

How many of the following metal chlorides impart characteristic colour to the oxidising flame ?
`LiCl, NaCl, KCl, RbCl, BeCl_2,MgCl_2,CaCl_2,SrCl_2,BaCl_2`

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The correct Answer is:
6
NaCl- Golden yellow , KCl-Lilac , `CuCl_2`-bluish green , `BaCl_2` -Apple green , `SrCl_2`-Crimson , `CaCl_2` -Brick red.
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