Zn+2HCl rarr ZnCl(2)+H(2) is an example ...

`Zn+2HCl rarr ZnCl_(2)+H_(2)` is an example for ……………….

chemical combination

chemical decomposition

Chemical displacement

chemical double displacement

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Zn+2HCl rarr ZnCl_(2)+H_(2) a) What type of reaction is it ? b) Which element was displaced? c) By which element?

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Zn + HCl rarr ZnCl_2 + H_2 .Is it a balanced equation ? Give the reason.

i) 2H_(2)O overset("Electricity")rarr 2H_(2)+O_(2) ii) 2AgBr overset("hv")rarr 2Ag+Br_(2) The above reactions are examples for …………………

K_(2)Cr_(2)O_(7) + HCl rarr KCl + CrCl_(3) + Cl_(2) + H_(2)O . How many moles of HCl reacts with one mole of K_(2)Cr_(2)O_(7) ?

NH_(3)+O_(2)rarrX+H_(2)O, X+O_(2)rarrY,Y+H_(2)Orarr Z+X and Z+Zn rarr Zn(NO_(3))+H_(2)O+Y . What are X and Z in the above sequence of reactions?

DeltaH^(0) for a reaction F_(2) + 2HCl rarr 2HF + Cl_(2) is given as -352.8 kJ. Delta H_(f)^(0) for HF is -268.3 KJ mol^(-1) , then Delta H_(f)^(0) of HCl would be

Na_(2)SO_(3) + HCl rarr Na_(2)SO_(4) + H_(2)O+X X + Na_(2) S overset( Delta )(rarr) S+Y Y + I_(2) rarr NaI +'Z'

Balance the following equations and write down the stoichiometric proportions. a) C+O_(2)rarr CO_(2) b) H_(2)+Cl_(2)rarr HCl c) N_(2)+H_(2)rarr NH_(3) d) Fe+O_(2)rarrFe_(2)O_(3) e) CaCO_(3)+HClrarr CaCl_(2)+H_(2)O+CO_(2) f) MnO_(2)+HCl rarr MnCl_(2)+H_(2)O+Cl_(2) g) Mg(OH)_(2)+HClrarrMgCl_(2)+H_(2)O h) KI+H_(2)SO_(4)rarr KHSO_(4)+I_(2)+SO_(2)

NaOH_((aq)) + HCl_((aq)) rarr NaCl_((aq)) + H_(2)O, Delta H= -13.6 Kcal. H_(2(g)) + (1)/(2) O_(2(g)) rarr H_(2)O , Delta H = - 68 Kcal. What is hat of formation of OH^(-) ?

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