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Q.
Formula of green vitriol is :
Delhi UMET/DPMTDelhi UMET/DPMT 2002
Solution:
[a] $FeSO _{4} \cdot 7 H _{2} O$ is green vitriol
[b] $MgSO _{4} \cdot 7 H _{2} O$ is epsom salt
[c] $ZnSO _{4} \cdot 7 H _{2} O$ is white vitriol
[d] $CuSO _{4} .5 H _{2} O$ is blue vitriol