Chloride of an element 'A' gives neutral solution in water. In the periodic table, the element 'A' belongs to __________

In halogens,which of the following increases from fluorine to iodine ?

The pair having both members from the same period of the periodic table is

Out of the following ________ is not isoelectronic

The Size of I, I+ and I- follow the order __________.

Diagonal relationship is shown by _________

The element which forms an amphoteric oxide is

Which of the following is not a Dobereiner triad ?

Out of the following the atomic number of the element having highest vapour pressure at room temperature is

Of the following pairs, the one containing a metalloid element is _________