1. The volume surface mean diameter, can be defined as ___ a) 6/ΦsAwPp b) 6/ΦsAwVp c) 6/ΦsAwDp d) 6/ΦsAwSp AnswerAnswer: a [Reason:] The average particle size of a mixture is defined by the volume surface mean diameter Ds which is related to Aw as 6/ΦsAwPp. 2. Volume of any particle, can be given as ______…