Identify the substance oxidised, reduced, oxidising agent and reducing agent for each of the following reactions :
`N_2H_4(l) + 2H_2O_2 (l) rarr N_2(g) + 4H_2O(l)`

Identify the substance oxidised, reduced, oxidising agent and reducing agent for each of the following reactions : HCHO(l) + 2Cu^(2+) (aq) + 5OH^- (aq) rarr Cu_2O(s) + HCOO^- (aq) + 3H_2O(l)

Justify the following reactions are redox rections : 4NH_3(g) + 5O_2(g) rarr 4NO(g) + 6H_2O (g)

Which substance is serving as a reducing agent in the following reaction ? Cr_(2) O_(7)^(2-) + 14H^(+) + 3Ni rarr 2Cr^(3+) + 7H_(2)O + 3Ni^(2+)

Justify the following reactions are redox reaction : CuO(s) + H_2 (g) rarr Cu (s) + H_2O(g)

Balance the following equation stepwise. SO_(2(g))+H_2S_((aq))rarrS_((s))+H_2O_((l))

State whether DeltaS is positive, negative or zero for the following reactions. 2H_2(g)+O_2(g)rarr2H_2O_(I)

Identify the molecularity and write the rate law for each of the following elementary reactions : H_(2(g)) + I_(2(g))rarr2HI_(g)

Write expressions of k_c for following chemical reactions. N_2 O_4(g) harr 2NO_2(g) .

Identify oxidizing agent in the following reactions: Fe_(2)O_(3)+3COrarr2Fe+3CO_(2)

Balance the following equation stepwise. NaOH_((aq))+H_2SO_(4(aq))rarrNa_2SO_(4(aq))+H_2O_((l))