b In sheet silicates although one \(SiO^{4-}_4\) tetrahedron is linked to other three tetrahedrons but the layer/sheet obtained is not planar, as fourth oxygen atom is projecting away from sheet.
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આપેલ સ્પીસીઝોની કુલ સંખ્યા કે જે તેની સૌથી બાહ્ય કોશમાં મધ્યસ્થ પરમાણુ આસપાસ આઠ ઈલેક્ટ્રોનો ધરાવતા નથી તે... $NH _3, AlCl _3, BeCl _2, CCl _4, PCl _5:$