Contrast the action of heat on the following and explain your answer
(i)` Na_(2)CO_(3)` and `CaCO_(3)`
(ii) `MgCl_(2).6H_(2)O`and `CaCl_(2).6H_(2)O`
(iii) `Ca(NO_(3))_(2) and NaNO_(3)`

Which of the following pairs can be distinguished by action of heat? i. K_(2)CO_(3) and CaCO_(3) ii. Na_(2)CO_(3) and Mg(NO_(3))_(2) iii. Mg(NO_(3))_(2) and NaNO_(2)

Na_(2)CO_(3)+Pb(NO_(3))_(2) to PbCO_(3)darr+NaNO_(3)

Complete the following equations (i) I_(2)+O_(3)+H_(2)O to HIO_(3)+ ….. , (ii) CaS+H_(2)O + CO_(2) to …. +…..

Compolete the following equations : (i) Na_(2)O_92)+ 2H_(2) O to (W) +H_(2)O_(2) (ii) 2KO_(2)+2H_(2)O to (X) +(Y) +O_(2) (iii) Na_(2) O+ CO_(2)to (Z).

Balance the following chemical equations. (i) HNO_(3) + Ca(OH)_(2) rarr Ca(NO_(3))_(2) + H_(2)O (ii) NaOH + H_(2)SO_(4) rarr Na_(2)SO_(4) + H_(2)O (iii) NaCl + AgNO_(3) rarrAgCl +NaNO_(3) (iv) BaCl_(2)+H_(2)SO_(4) rarr BaSO_(4) + HCl

Write the empirical formulae of the following compounds. (i) C_(6)H_(6) (ii) Na_(2)CO_(3) (iii) C_(6)H_(12)O_(6) (iv) H_(2)O_(2) (v) CH_(3)COOH (vi) CuSO_(4)