1.

Due to crystal fractures , the slippage of the planes relative to each other is the easiest way of distorting the crystal . However,even along their most favoured direction distortion of the crystals required a large force it is due to

Answer»

displacement may bring ions of the same charge CLOSE to each other .
displacement may bring ions of the same charge away to each other .
coulombicforces
motion of these PLANES in a direction parallel to these ROWS of ions.

Answer :C


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