In which of the following reactions, the concentration of product is higher than the concentration of reactant at equilibrium (K=equilibrium constant)

NH₄NO₃ on heating to 250⁰C-260⁰C gives the gas

The transition temp.at which rhombic sulphur becomes monoclinic sulphur is

Number of coulombs of current required to convert completely 1 mole of MnO₄^- ions in acid medium to one mole of Mn²⁺ ions electrolytically is

Consider the two gaseous equilibria involving SO2 and the corresponding equilibrium constants at 298K

SO₂(g)+1/2O₂(g)⇔SO₃(g);K₁

2SO₃(g)⇔2SO₂(g)+O₂(g);K₂

The values of the equilibrium constants are related by

X,Y,Z hydrocarbons molecular formula are CH₄, C₂H₄, C₂H₂, these three are passed through porcelain tube containing ammonical cuprous chloride. The out coming gases would be

Which of the following functional group shows +R effect

In the extraction of iron from haematite,the charge used is haematite,coke and lime stone in the following weight ratio

The salt of phosphorous acid are called

pH of pure H₂O at 25⁰C is