Balance the following equations:
a. `H_3PO_3 rarr H_3PO_4+PH_3`
b. `Ca+H_2O rarr Ca(OH)_2+H_2`
c. `Fe_2(SO_4)_3+NH_3+H_2O rarr Fe(OH)_3+(NH_4)_2SO_4`

Complete the following reactions? C_2H_4+O_2rarr

Name the type of preparation in which the following examples are involved. a) As_2 O_3+3 H_2 ~S rarr As_2 ~S_3+3 H_2 O b) SO_2+2 H_2 ~S rarr 2S+2 H_2 O c) FeCl_3 +3 H_2 O rarrFe(OH)_3+3 HCl

Complete the following reactions:- Ca_3P_2 + 6H_2O rarr ……………….. + …………………

Complete the following'reactions: i). C_6 H_5 NH_2+CHCl_3+alc KOH rarr ii). C_6 H_5 ~N_2 Cl+H_3 PO_2+H_2 O rarr iii). C_6 H_5 NH_2+H_2 SO_4(conc) rarr iv). C_6 H_5 ~N_2 Cl+C_2 H_5 OH rarr v). C_6 H_5 NH_2+Br_2(aq) rarr vi). C_6 H_5 N H_2+(C H_3 C O)_2 O rarr vii). C_6 H_5 ~N_2 dotCloverset((1)HBF_(4))underset((ii)NaNO_(2)//Cu,Delta)rarr

Complete the following reactions: (i) CaCO_3overset(1200K)rarr ? (ii) CaCO_3+H_2SO_4rarr ?

A list of reactions of sulphuric acid are given below. Zn + H_2SO_4 rarr ZnSO_4 + 2H_2O + SO_2 . 2C_2H_5OH + H_2SO_4 rarr C_2H_5-O-C_2H_5 + H_2O . 2NaOH + H_2SO_4 rarr Na_2SO_4 + 2H_2O . HCOOH + H_2SO_4 rarr H_2O + CO . 3H_2S + H_2SO_4 rarr 4H_2O + 4S . 2P + 5H_2SO_4 rarr 2H_3PO_4 + 2H_2O + 5SO_2 .Classify the reactions Into 3 sets based on the following properties of H_2SO_4 :- Oxidising property.

How many of the following reactions are roasting? i) 4FeS_2 + 11O_2 rarr 2Fe_2O_3 + 8SO_2 ii) 2PbS + 3O_2 rarr 2PbO + 2SO_2 iii) HgS + O_3 rarr Hg + SO_2 (iv) Al_2O_3.2H_2O rarr Al_2O_3 + 2H_2O (v) ZnCO_3 overset(Delta) rarr 4ZnO + CO_2 uarr

Complete the following chemical reactions. i) PbS(s)+H_2 O_2(aq) rarr ii) Mn O_4^-(a q)+H_2 O_2(a q) rarr iii) CaO(s)+H_2 O(g) rarr iv) AlCl_3(g)+H_2 O(l) rarr v) C a_3 N_2(s)+H_2 O(l) rarr Classify the above into (a) hydrolysis (b) redox and (c) hydration reactions.