4th Class Science Matter and Materials Question Bank Matter and Materials

  • question_answer Select the correct statement about the separation technique shown in the picture.

    A)  Salt from water can be removed using this method.

    B)  This method is used to separate soluble substances from a liquid.

    C)  Stones from sand can be separated using this method.

    D)  It first requires sedimentation.

    Correct Answer: D

    Solution :

    The picture shown here is of decantation. In it, first sedimentation of the insoluble substance is required. Then the liquid that floats above is decanted slowly into another container and only the sedimented substance remains in the first container. This method can only be used to separate insoluble substances from a liquid.

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