Chemistry
Give examples :
(a) Two metals which give hydrogen with cold water.
(b) A metal which liberates hydrogen only when steam is passed over red hot metal.
(c) A metallic oxide which can be reduced into metal by hydrogen.
(d) An electrolyte.
(e) A metal of which an electrode is made.
Related Questions
Match the statements in column A with those in column B.
Column A Column B A metal which reacts with cold water to form hydrogen. Reduction A gas which is inflammable and a non-supporter of combustion. Hydrogenation A process in which vanaspati ghee is prepared from vegetable oils. Oxidation The removal of hydrogen or addition of oxygen. Sodium The addition of hydrogen or removal of oxygen. Hydrogen Name the following:
(a) The process in which oxygen is added or hydrogen is removed.
(b) A process by which hydrogen gas is manufactured.
(c) A solid conductor through which current enters or leaves the electrolyte.
(d) The charged particles present in an electrolyte.
(e) A substance which removes oxygen from a compound.
Complete and balance the following equations:
(a) H2 + ……………….. ⟶ 2HCl
(b) H2 + S ⟶ ……………………
(c) Zn + ……………. ⟶ ZnCl2 + H2
(d) CuO + ………….. ⟶ Cu + ………….
(e) Fe + H2O ⟶ …………….. + ……………
(f) K + H2O ⟶ ……………… + ……………
Define:
(a) catalytic hydrogenation
(b) oxidation
(c) reduction
(d) redox reaction
(e) electrolysis
(f) electrolyte