Chemistry
Answer
(i) Acid — An acid is a compound which when dissolved in water yields hydronium ions [H3O+] as the only positively charged ion.
(ii) Molar volume — It is the volume occupied by 1 mole of a gas at STP.
(iii) Neutralization — It is the process due to which [H+] ions of an acid react completely or combine with [OH-] ions of a base to give salt and water only.
Related Questions
Concentrated nitric acid oxidises phosphorus to phosphoric acid as
P + HNO3 ⟶H3PO4 + H2O + NO2
Balance the equation and answer the following questions based on it.
(i) What mass of phosphoric acid can be prepared from 6.2 g of phosphorus?
(ii) What mass of nitric acid will be consumed at the same time ?
(iii) What would be the volume of steam produced at the same time if measured at 760 mm. Hg pressure and 273°C.
(Atomic wt of H = 1, N = 14, O = 16, P = 31) ?
What is an 'alloy'. Give composition of
(i) duralumin
(ii) brass
(iii) fuse metal.
(i) Define pH. If the hydrogen ion concentration of a solution is 10-12 moles per litre, calculate its pH value.
(ii) What fluid is injected when yellow wasps or white ants bite? How can the pain be relieved?
(iii) A solution of Iron (III) chloride has a pH less than 7. Is the solution acidic or alkaline. Write the equation of its hydrolysis.
(iv) If iron is reacted with dilute sulphuric acid, what will be the product formed ?
What do you observe when —
(i) Ammonia is passed over heated copper oxide.
(ii) Conc. H2SO4 is added to blue vitriol.
(iii) Acetylene is passed into bromine water.
(iv) NaCl is added to silver nitrate solution.
(v) Conc. HCl acid is exposed to atmosphere.