An alkaline earth metal $(M)$ gives a salt with chlorine,which is insoluble in water at room temperature but soluble in boiling water. It also forms an insoluble sulphate whose mixture with a sulphide of a transition metal is called 'lithopone' - a white pigment. Metal $M$ is

  • A
    $Ca$
  • B
    $Mg$
  • C
    $Ba$
  • D
    $Sr$

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