ધોરણ 6 ગુજરાતી સ્વઅધ્યયનપોથી || std 6 gujarati ch.5 mahenat ni mosam || dhoran 6 gujarati path 5 mahenat ni mosam

A circular water fountain 6.6 m in diameter is surrounded by a path of width 1.5 m. The area of this path in square metres is-

Predict the order of reactivity of the following compounds in S_(N)1 and S_(N)2 reactions : (a) The four isomeric bromobutanes (b) C_(6)H_(5)CH_(2)Br, C_(6)H_(5)CH(C_(6)H_(5))Br, C_(6)H_(5)CH(CH_(3))Br, C_(6)H_(5)C(CH_(3))(C_(6)H_(5))Br

[NiCI_(2){P(C_(2)H_(5))_(2)(C_(6)H_(5))}_(2)] exhibits temperature dependent magnetic behaviour(paramagnetic//diamagnetic) The coordination geometries of Ni^(2+) in the paramagnetic and diamagnetic states are respectively .