The s-Block Ele...

Which of the following statement(s) is/are INCORRECT ? 

A metal $$M$$ readily forms water soluble sulphate and water insoluble hydroxide, $$M(OH)_2$$. Its oxide $$MO$$ is amphoteric, hard and having high melting point. The alkaline earth metal is :

The ion having maximum value of hydration energy is:

Sodium metal cannot be stored under 

If $$Na$$ is heated in presence of air, it forms 

Point out of the incorrect statements regarding $$Be$$ (Group $$IIA$$)

Which of the following statements is true?

Which of the following has maximum solubility in water?

The atomic radii of alkali metals $$(M)$$ lie in the order $$Li < Na < K < Rb$$ but the radii of $$M^{+}$$ ions in aqueous solution lie in the reverse order $$Li^{+} > Na^{+} > K^{+} > Rb^{+}$$. What is the reason for this reverse order (on going from $$Li$$ to $$Rb$$)?

Which amongst the following is soluble in water?