1.

Which of the following is correct.

Answer»

`{:("CRYSTAL system","Axial DISTANCE","Axial angles","Examples"),("Cubic",aneb=c,alpha=betanegamma=,Cu","KCl):}`
`{:("Crystal system","Axial distance","Axial angles","Examples"),("Monclinic",aneb=c,alpha=beta=gamma=90^(@),PbCrO_(2)):}`
`{:("Crystal system","Axial distance","Axial angles","Examples"),("Rhombohed",a=b=c,alpha=beta=gammane90^(@),CaCO_(3)HgS):}`

SOLUTION :Rhombohedral crystal system
`a=b=c, alpha=beta=gammane90^(@)`


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