Why sealed soda water bottle on opening shows the evolution of gas with effervescence?

Aerated water bottles are kept under cold water during summer. Why ?

(A) : A tightly closed metal lid of a glass bottle can be opened more easily if it is put in hot water for some time. ( R) : The coefficient of expansion of metal lid is greater than that of glass.

Draw a neat diagram showing a base solution in water conducts electricity. Why the solution of sugar/ glucose in water do not conduct electricity ?

A gas 'X' is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas 'Y'. Identify 'X' and 'Y':

1 mole each of CaC_(2), Mg_(2)C_(3) reacts with excess water in separate open flasks work done by the gas during the dissolution shows the order:

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 explasion results from the sudden production of a huge volume of hot gas. It has been claimed that NH_(4) NO_3 fertilizer (NH_4)_(2)HPO_4 Analysis of such a disensitized sample of NH_(4) NO_3 showed the mass % nitrogen to be 33.81% NH_4NO_3 on explosion gives

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 explasion results from the sudden production of a huge volume of hot gas. It has been claimed that NH_(4) NO_3 fertilizer (NH_4)_(2)HPO_4 Analysis of such a disensitized sample of NH_(4) NO_3 showed the mass % nitrogen to be 33.81% An explosive mixture called Amatol contains :