An aqueous solution of an halogen salt of potassium reacts with same halogen X2 to give KX3, a brown coloured solution, in which halogen exists as X3- ion, X2 as a Lewis acid and X- as a Lewis base, halogen X is -
The correct order of basic-strength of oxides of alkaline earth metals is -
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The order of melting point of chlorides of alkali metals is -?
Z (colourless gas) T(blue colour)
Then, substances Y and T are -?
Weakest base among KOH, NaOH, Ca(OH)2 and Zn(OH)2 is -
The aqueous solutions of lithium salts are poor conductor of electricity rather than other alkali metals because of -
Sodium metal is highly reactive and cannot be stored under -
Nitrogen dioxide cannot be prepared by heating -
Which one of the following fluoride of alkali metals has the highest lattice energy ?
White heavy precipitates are formed when BaCl2 is added to a clear solution of compound A. Precipitates are insoluble in dilute HCl. Then, the compound A is -
Amongst LiCl, RbCl, BeCl2 and MgCl2 the compounds with the greatest and the least ionic character respectively
X + C + Cl2Y : CO; Y + 2H2O ® Z + 2HCl
Compound Y is found in polymeric chain structure and is an electron deficient molecule. Y must be -
The correct order of degree of hydration of M+ ions of alkali metals is -?
The order of thermal stability of carbonates of IIA group is -?
A pair of substances which gives the same products on reaction with water is -
Which of the following is not a anomalous property of lithium ?
The commercial method of preparation of potassium by reduction of molten KCl with metallic sodium at 850°C is based on the fact that -?
Be2C + H2O → BeO + X
CaC2 + H2O → Ca(OH)2 + Y; then X and Y respectively -