Give reasons: Aluminium utensils should not be kept in water overnight.

Why aluminum utensils should not be kept in water overnight.

Give reasons : (i) Conc. HNO_(3) can be transported in aluminium container. (ii) A mixture of dilute NaOH and aluminium pieces is used to open drain. (iii) Graphite is used as lubricant. (iv) Diamond is used as an abrasive. (v) Aluminium alloys are used to make aircraft body. (vi) Aluminium utensils should not be kept in water overnight. (vii) Aluminium wire is used to make transmission cables.

Give reasons for the following : (a) Aluminium wire is used in transmission cables. (b) Aluminium utensils should not be used to strore drinking water for long time. ( c) A mixture of Al pieces and NaOH is used to open the drain. (d) Aluminium alloys are used to make aircraft bodies.

Give reasons: Aluminium alloys are used to make aircraft body.

Give reasons: Aluminium wire is used to make transmission cables.

Give reason: Aluminium is a highly reactive metal, yet it is used to make utensils for cooking