Assertion : Salt such as NaCl dissolves, the Na+ and Cl− ions leaving the crystal lattice acquire far greater freedom Reason: In thermodyanamic terms, the formation of solution occurs with a favourable change in free energy i.e., ΔH has a high positive value and TΔS a low negative value.
Bleaching powder is a mixed salt of hydrochloric acid and hypochlorous acid. It has the formula, CaOCl2.H2O. It is manufactured by the action of chlorine on dry slaked lime at 40°C. There is also a view that bleaching powder is a mixture of calcium hypochlorite and basic calcium chloride Ca(OCl)2+CaCl2⋅Ca(OH)2⋅H2O
Phosphorus forms a number of oxoacids which differ in their structures and oxidation state of phosphorus. All the acids contain phosphorus atom/atoms linked tetrahedrally to four other atoms or groups. Each of them has at least one P = O or P→O unit and one P–OH unit. The OH group is ionisable but H atom linked directly to P is non-ionisable. Strucutres of all the acids are considered to be derived either from phosphorus acid or phosphoric acid
Terrorists often use ammonium nitrate fertilizer as an ingredient in car bombs. When ammonium nitrate explodes, it decomposes to gaseous nitrogen, oxygen and water vapour. The force of the explosion results from the sudden production of a huge volume of hot gas. It has been claimed that NH4NO3 fertilizer can be rendered unexplodable by adding compounds such as diammonium hydrogen phosphate (NH4)2HPO4. Analysis of such a disensitized sample of NH4NO3 showed the mass % nitrogen to be 33.81%
Mica is one of the most indispensable minerals used in electric and electronic industry. Which of the following is the most appropriate reason for the same? i) It has excellent di-electric strength ii) It has an insulating propertyiii) It shows low power loss iv) It shows resistance to high voltage