The correct order of conductivity of ions in water is :

Given below are two statements :

Statement I : Both CaCl₂ . 6H₂O and MgCl₂ . 8H₂O undergo dehydration on heating.

Statement II : BeO is amphoteric whereas the oxides of other elements in the same group are acidic.

In the light of the above statements, choose the correct answer from the options given below :

Match List - I with List - II.

	List I (Salt)		List II (Flame colour wavelength)
(a)	LiCl	(i)	455.5 nm
(b)	NaCl	(ii)	670.8 nm
(c)	RbCl	(iii)	780.0 nm
(d)	CsCl	(iv)	589.2 nm

Choose the correct answer from the options given below :

Match the following compounds (Column-I) with their uses (Column-II) :

S.No.	Column-I	S.No.	Column-II
(I)	Ca(OH)2	(A)	casts of statues
(II)	NaCl	(B)	white wash
(III)	CaSO4, $${1 \over 2}$$H2O	(C)	antacid
(IV)	CaCO3	(D)	washing soda preparation