Chemistry
A chemical reaction may be 'reversible' in nature. State the meaning of the term in italics. Give a reason why a catalyst is used in certain chemical reactions.
Give a balanced equation for the following -
(a) A reversible catalytic reaction involving -
(i) nitrogen as one of the reactants
(ii) sulphur dioxide as one of the reactants.
Related Questions
Give balanced equations for -
(i) A direct combination reaction involving two elements, one of which is a non-metal.
(ii) A thermal decomposition reaction involving heat on limestone [calcium carbonate].
(iii) An electrolytic decomposition reaction involving a neutral liquid.
(iv) A displacement reaction involving a metal above hydrogen in the activity series with copper [II] sulphate solution.
(v) A double decomposition neutralization reaction involving an acid & a base.
(vi) A white precipitate obtained during a double decomposition reaction involving a silver salt with a sodium salt.
State what is meant by 'reactivity series of metals'. With reference to -
(a) Water
(b) Acids
explain with suitable examples how the reactivity of the metals could be differentiated.
State which type of chemical reactions proceed with -
(a) Evolution of heat energy
(b) Absorption of heat energy.
State in each of the following reactions whether heat is evolved or absorbed
(i) water is added to quicklime
(ii) two neutral gases on passage through an electric arc give nitric oxide
(iii) two neutral gases combine to give - a basic gas.
Certain thermal decomposition reactions, result in formation of oxides. Give balanced equations for the thermal decomposition of the following, which result in formation of a metallic oxide.
(a) Limestone
(b) Lead carbonate
(c) Calcium nitrate
(d) Calcium hydroxide.