Which one of the following is correct order of increase of size ?

Identify the correct order of solubility in aqueous medium

The increasing order of the first ionisation enthalpies of the elements B,P,S and F is

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

The atomic numbers of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23,24,25 and 26. Which one of these may be expected to have the highest second ionisation enthalpy?

In which of the following pairs does one elements exist as a solid and the other as a liquid under normal conditions ?

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

Ionisation potential and electron affinity of fluorine are 17.42 and 3.45 eV respectively. What will be the ratio of electronegativity of fluorine on Mulliken scale and Pauling scale?

Which of the following electronic configurations would exhibit the lowest ionisation energy ?

Which element was named as Eka-silicon in Mendeleev's classification of elements ?