Gas evolved when `NH_3` is passed over heated PbO is-

What wll happen when NH_3 is passed over heated cupric oxide. Give balanced equation.

What happens when NH_(3)(g) is passed over molten sodium ?

Why does a hot Pt-wire becomes brighter when NH_(3) gas is passed over it?

A brown substance 'X' on heating in air forms a substance 'Y' when hydrogen gas is passed over heated 'Y', it again changes back into 'X'

What type of sol is obtained when H_(2)S gas is passed over an aqueous solution is SO_(2) ?

What happens if NH_3 is passed over hot so sodium. Give reaction.

A gas is evolved when white phosphours is heated with concentrated NaOH solution in an inert atmosphere of CO_(2) . Which one of the following statements about the gas in correct -

When dilute HCI is added to a white substance (A), a colourless gas (B) is evolved. When the gas (B) is passed through clear lime water, a white precipitate ( C) is obtained. The precipitate dissolves when excess of the gas (B) is passed through the lime water. The residue obtained on heating the solid substance (A) is yellow when hot but white when cold. When the gas (B) is passed through red hot charcoal, another gas (D) is obtained. The gas (D) gets absorbed in arnmoniacal cuprous chloride solution . Identify (A), (B), (C) and (D) and give the relevant reactions.

What volume of H_(2) gas at STP will be evolved when a current of 10 A is passed for 6 min 26 s through a dilute solution of H_(2)SO_(4) ?