Hydrogen, Alkali and Alkaline earth metals

Lithium atom and ion are very small and are comparable in sizes to those of Mg. Their polarizing power (charge / radius) are almost the same, and as a result have similar properties. 

        LiNO₃ on heating gives

        (A)    LiNO₂ and O₂

        (B)    Li₂O, NO₂ and O₂

        (C)    Li + NO₂ + O₂

        (D)    does not decompose on heating 

        The statements that are true of LiOH are

        (i)     it is a strong base

        (ii)    it decomposes on heating to give the oxide

        (iii)    it is a work base

        (iv)   it is the least soluble of alkali metal hydroxides

(A)        (i), (ii)

(B)        (iii), (iv)

(C)        (i), (iii), (iv)

(D)        (ii), (iii), (iv) 

        The fluorides of alkali metals having the highest and lowest solubility are, respectively

        (A)    LiF, CsF

        (B)    NaF, CsF

        (C)    CsF, LiF

        (D)    CsF, NaF