Identify the correct statements about alkali metals. A. The order of standard reduction potential ( M + | M ) for alkali metal ions is Na > Rb > Li . B. CsI is highly soluble in water. C. Lithium carbonate is highly stable to heat. D. Potassium dissolved in concentrated liquid ammonia is blue and paramagnetic. E. All alkali metal hydrides are ionic solids. Choose the correct answer from the options given belo

Step-by-step solution

A. Electrode potential of given elements are: Li   =   - 3 . 04     Na   =   - 2 . 714     Rb   =   - 2 . 98 The standard reduction potentials (E) of the alkali metals do not follow the trend based on ionisation energies. Unexpectedly, lithium is the strongest reductant, and sodium is the weakest. Therefore, reducing character sequences is Na   < Rb   <   Li . B. The low solubility of CsI is due to smaller hydration enthalpy of its two ions. C