'H', 'M' and 'Q' are the aq chlorides of the element 'X', 'Y' and 'Z' respectively. 'X', 'Y' and 'Z' are in the same period of the periodic table. 'Q' gives a white ppt with NaOH but this white ppt dissolves as more NaOH is added. When NaOH is added to 'M' a white ppt forms which does not dissolve when base is added. H does not gives a ppt with NaOH. Which of the following statement are correct? I. The three element are metals II. The electronegativity values decreases from 'X' to 'Y' to 'Z' III. 'X', 'Y'and 'Z' could be Na, Mg and Al IV. The first ionisation energy increases from 'X' to 'Y' to 'Z'.

'H', 'M' and 'Q' are the aq chlorides of the element 'X', 'Y' and 'Z'

1.	'H', 'M' and 'Q' are the aq chlorides of the element 'X', 'Y' and 'Z' respectively. 'X', 'Y' and 'Z' are in the same period of the periodic table. 'Q' gives a white ppt with NaOH but this white ppt dissolves as more NaOH is added. When NaOH is added to 'M' a white ppt forms which does not dissolve when base is added. H does not gives a ppt with NaOH. Which of the following statement are correct? I. The three element are metals II. The electronegativity values decreases from 'X' to 'Y' to 'Z' III. 'X', 'Y'and 'Z' could be Na, Mg and Al IV. The first ionisation energy increases from 'X' to 'Y' to 'Z'.
Answer» I, II, III only `I` and `III` only `II` and `IV` only `III` and `IV` ANSWER :B