KO2 (potassium superoxide) is used in oxygen cylinders in space and submarnies because it
Absorbs CO2 and increases O2 content
Although KO2 also reacts with moisture of the breath but does not completely eliminate it.
The stability of the following alkali metal chlorides follows the order:
The product, which is not formed when sodium thiosulphate is added to a natural solution of potassium permanganate, is
The pair of compound which can exist together in aqueous solution is
Which pair does not show hydrogen isotopes?
An unknown inorganic compound (X) loses its water of crystallization on heating and its aqueous solution gives the following reactions:
(a) It gives a white turbidity with dilute HCl solution
(b) It decolourises a solution of iodine in potassium iodide
(c) It gives a white precipitate with silver nitrate solution which turns black on standing.
Identify the compound (X)
In photography, sodium thiosulphate is used for
Which of the following anhydrous halides can be prepared by heating its hydrates form?
The solubility in water of sulphates down the Be group is:
Be > Mg > Ca > Sr > Ba. This is due to
Which of the following is the correct order of gradually decreasing basic nature of the oxides?
A metal M readily forms water soluble sulphate MSO4, water insoluble hydroxide M(OH)2 and oxide MO which becomes inert on heating. The hydroxide is soluble in NaOH. The metal M is