s-Block Elements

The reaction that does NOT define calcination is :

The metal used for marking X–ray tube window is :

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of :

The alloy used in the construction of aircrafts is :

A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads
to an anhydrous white powder Z. X and Z, respectively, are :

Both lithium and magnesium display several similar properties due to the diagonal relationship; however,
the one which is incorrect, is :

The correct order of the solubility of alkaline-earth metal sulphates in water is :

The commercial name for calcium oxide is :

The main oxides formed on combustion of Li, Na and K in excess of air are, respectively :

The hottest region of Bunsen flame shown in the figure below is :

Which of the following atoms has the highest first ionization energy?

Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice
enthalpy?

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :

Which of the following on thermal decomposition yields a basic as well as an acidic oxide?

The ionic mobility of alkali metal ions in aqueous solution is maximum for :

Based on lattice energy and other considerations which one of the following alkali
metal chlorides is expected to have the highest melting point :

One mole of magnesium nitride on the reaction with an excess of water gives :

The substance not likely to contain CaCO3 is :

The solubilities of carbonates decrease down the magnesium group due to a decrease in :

In curing cement plasters water is sprinkled from time to time. This helps in :

The metallic sodium disolves in liquid ammonia to form a deep blue coloured solution. The deep blue colour is due to formation of :

KO2 (potassium super oxide) is used in oxygen cylinders in space and submarines because it :

A metal M readily forms its sulphate MSO4, which is water-soluble. It forms its oxide MO which becomes inert on heating. It forms an insoluble hydroxide M(OH)2 which is soluble in NaOH solution. The M is :