T/F Silver metal gets tarnished on exposure to atmosphere due to the formation of AgOH.

Copper gets covered with green layer when exposed to air due to the formation of:

T/F Sodium metal is kept immersed in kerosene.

T/F Silver metals acts as non-conductor of electric current.

Which among the following statements is are true ? Exposure of silver chloride to sunlight for a long duration turns grey due to (i) The formation of silver by decompositionof silver chloride (ii) Sublimation of silver chloride (iii) decomposition of chlorine gas from silver chloride (iv) oxidation of silver chloride

Figure 6.20 shows a metal rod PQ resting on the smooth rails AB and positioned between the poles of a permanent magnet. The rails, the rod, and the magnetic field are in three mutual perpendicular directions. A galvanometer G connects the rails through a switch K. Length of the rod =15 cm, B = 0.50 T, resistance of the closed loop containing the rod = 9.0 mOmega Assume the field to be uniform. With K open and the rod moving uniformly, there is no net force on the electrons in the rod PQ even though they do experience magnetic force due to the motion of the rod. Explain. :

T/F Aluminium metal does not react even with steam.

The metals used in the formation of German silver are-

T/F Tarnished copper vessles are cleaned with tamarind juice.