what is effect of heat on the following compounds? (Give equations for the reactions)
(i) `CaCO_(3)` (ii) `CaSO_(4) 2H_(2)O`

Giving justification, catogories the following species as Nuclophile or Electrophile . (i) SO_(3) (ii) C_(2)H_(5)O

Complete and balance the following chemical equations: (i) CaCO_(3)+HCl (ii) Al+HCl (iii) MnO_(2)+HCl

Complete the following chemical equations : (i) Ca_(3)P_(2)+H_(2)Orarr (ii) Cu+H_(2)SO_(4)" (conc.)"rarr

(i) What is a catalyst ? Write the chemical equation to represent the hydrogenation of ethene. (ii) Which of the following compounds belong to the same homologous series ? C_(2)H_(6), C_(2)H_(6)O_(2), C_(2)H_(6)O, C_(4)H_(10) .

Complete the following reactions : (i) C_(2)H_(4)+O_(2)rarr (ii) 4Al+3O_(2)

a) List any three observation that determine that a chemical reaction has taken place. Also list three in formation that cannot be obtained about a chemical reaction merely by its chemical equation. b) Balance the following chemical equations i) Fe+H_(2)O to Fe_(3)O_(4) +H_(2) ii) CO_(2)+H_(2)O to C_(6)H_(12)O_(6) +O_(2) OR a) Explain the following in terms of gain or lose of oxygen with two examples each. i) Oxidation ii) reduction. b) Balance the following chemical equations. 1) HNO_(3)+Ca(OH)_(2) to Ca(NO_(3))_(2)+H_(2)O ii) NaOH + H_(2)SO_(4) to Na_(2)SO_(4) + H_(2)O

Identify the type of chemical reactions in the following equations : CH_(4)+2O_(2) to CO_(2)+H_(2)O

Balance the following chemical equation : Fe+H_(2)O to Fe_(3)O_(4)+H_(2)