Justify the following reaction is a redox reaction.
`CuO_((s)) + H_(2(g)) to Cu_((s)) + H_(2)O_((g))`

Complete the following reactions and balance them: CO_((g))+H_(2(g))to

The change in the oxidation number of S in H_2S and SO_2 in the following industrial reaction : 2H_(2)S_((g))+SO_(2_(g)) to 3S_((s))+2H_(2)O_((g)) .

Which among the following chemical reaction is an example of combination reaction ? (i) H_(2(g))+Cl_(2(g)) to 2HCl_((g)) (ii) NaOH _((aq))+HCl_((aq))+H_(2)O_((l)) (iii ) 2Mg_((s)) +O_(2(g)) to 2MgO_((s)) (Iv ) Zn_((s))+2HCl_((aq)) to ZnCl_(2) +H_(2(g))

Calculate Deltan_(g) , for the following reactions (i) H_(2(g))+I_(2(g))hArr2HI_((g)) (ii) 2H_(2)O_((g))+2Cl_(2(g))hArr4HCl_((g))+O_(2)((g))

Calculate the standard enthalpy of formation of CH_3OH_((l)) from the following data : (i) CH_3OH_((l)) +3//2 O_(2(g)) to CO_(2(g)) + 2H_2O_((l)) , Delta_r H^(Ө)=-726 "kJ mol"^(-1) (ii) C_((s)) + O_(2(g)) to CO_(2(g)) , Delta_c H^(Ө)=-393 "kJ mol"^(-1) (iii) H_(2(g)) +1//2O_(2(g)) to H_2O_((l)) , Delta_f H^(Ө)=-286 "kJ mol"^(-1)