Copper-T acts by

A depolarizer essentially acts an agent which can prevent a) the covering of copper plates by a layer of hydrogen b) the back emf

True or false: In Zn-Cu cell, copper acts as a cathode while in Cu-Ag cell, copper acts as anode.

Copper-T is a device that prevents :

In copper turnings test, pieces of copper is added to a nitrate salt and heated with conc. H_(2)SO_(4) .In this reaction copper acts as

Assertion: Copper-T is an effective contraceptive device in human females. Reason: Copper-T prevents passage of sperms from vagina upwards into Fallopian tubes.