3.Which of the following is a redox reaction?
(a) `NaCl+KNO_(3)rarr NaNO_(3)+KCl`
(b) `CaC_(2)O_(4)+2HCl rarr CaCl_(2)+H_(2)C_(2)O_(4)`
(c) `Mg(OH)_(2)+2NH_(4)Cl rarr MgCl_(2)+2NH_(4)OH`
(d) `Zn+2AgCN rarr2Ag+Zn(CN)_(2)`

In the following balanced reaction, 4O_(2)^(x)+2H_(2)O rarr 4OH^(-)+3O_(2)

Na_(2)[Zn(OH)_(4)]+4HCl to ZnCl_(2)+NaCl+H_(2)O

Which of the following reactions is an example of second order reaction (A) 2H_(2)O_(2)rarr2H_(2)O+O_(2) (B) SO_(2)Cl_(2)rarr SO_(2)+Cl_(2) (C) 2N_(2)O_(5)rarr2N_(2)O_(4)+O_(2) (D) 2N_(2)O rarr2N_(2)+O_(2)

Indicate the species which are oxidised and reduced in the following reactions: (a) CN^(Ө) + OCl^(Ө) rarr N_(2)+HCO_(3)^(Ө) + Cl^(Ө) (b) C_(6)H_(5)OH + O_(3) rarr CO_(2)+H_(2)O + O_(2) ( c) I^(Ө) + O_(3) rarr O_(2) + I_(2) (d) S_(2)O_(3)^(2-) + Cl_(2) rarr HSO_(4)^(Ө) + Cl^(Ө) (e) C + ZnO rarr Zn+CO

In the following reaction: x KMnO_(4)+y NH_(3) rarr KNO_(3)+MnO_(2)+KOH+H_(2)O x and y are

CaCl_(2)+Na_(2)C_(2)O_(4) to CaC_(2)O_(4)darr+2NaCl

In the redox reaction, x KMnO_(4) + NH_(3) rarr y KNO_(3) + MnO_(2) + MnO_(2) + KOH + H_(2)O , x and y are

Which hydrolysis reaction is not correct? (A) CaH_(2)+2H_(2)O rarr Ca(OH)_(2)+2H_(2) (B) CaC_(2)+2H_(2)O rarr Ca(OH)_(2)+C_(2)H_(4) (C) AlN+3H_(2)O rarr Al(OH)_(3)+NH_(3) (D) Ca_(3)P_(2)+6H_(2)O rarr Ca(OH)_(2)+2PH_(3)