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Jessica James Grade: 10
        
why do we write MG2+O2=MGO
AS 2MG+O2 =MGO
2  ACTIVITY 1.3 PG 2  WHY ZN DOES NOT HAVE VALENCY 2 IT IS WRITTEN AS ZN+H2SO4=ZNSO4+H2
3 PLEASE GIVE ME THE UNBALANCED OR THE SIMPLEST FORM FOR  RESPIRATION PROCESS
4 WHAT IS H2 HYDROGEN OR HYDROXIDE IF HYDROGEN THEN WHY ITS VALENCY IS 2 IT IS SUPPOSE TO BE 1 SINCE IN EVERY EQUATION HYDROGEN IS WRITTEN AS H2
5 BALANCE PG 6 QUESTION 2( 3)CBSE READER
6VALENCY OF OXIDE IS 3 BUT WHY IS IT WRITTEN AS 2 EVERYWHERE EXAMPLE PG 6 CAO +..................
7 BALANCE WITH STEPS THE FOLL EQUATIONPB(NO3)2=PBO+2NO2+O2
8 BALANCE WITHSTEPS PG9 1ST EQUATION
9IN DISPLACEMENT REACTION 
FE+CUSO4=FESO4+CU
WHY THE VALENCY OF FE NOT 2 BUT 1 
IS THIS BECAUSE OF SOME FERRIC FERROUS THING AND IF SO WHAT IS THE DIFFERENCE BETWEEN FERROUS AND FERRIC
AND WHY IS IT THAT IN THIS EQUATIONIF CU IN THE LHS HAVING VALENCY 2 AND IN THE RHS VALENCY 1
10 IRON NAIL IS WHAT FERRIC OR FERROUS?
11 EXPLAIN EQUATION 1.32 PG 12 EQUATION CBSE READER
12WHY THE VALENCY OF NITROGEN IS NOT 3 IN HYDROGEN +NITROGEN GIVES AMMONIA IT IS WRITTEN AS H2+N=NH3
 
2 years ago

Answers : (2)

Charchit Tailong
askIITians Faculty
147 Points
										1)To balanve the reaction we write2MG+O2 =2MGO.
3)Respiration is much more than just breathing; in fact, the term refers to two separate processes, only one of which is the intake and outflow of breath. At least cellular respiration, the process by which organisms convert food into chemical energy, requires oxygen; on the other hand, some forms of respiration are anaerobic, meaning that they require no oxygen.
10)Iron nail is not even ferric or ferrous,IT IS IRON ITSELF i.e Fe,When it oxidised then it converts into ferrous or ferric by reacting with Oxygen.
9)Iron has electronic configuration of:-[Ar] 3d6 4s2
But if we talk about Fe in +2 state,then 2 electrons from 4s2 will get extracted then the Fe shell becomes defficient of 2 electrons which it will share from so4.
About difference between ferrous and ferric,Always remember that Any element ending from IC Has always more oxidation state then OUS Ending element.E.g.Fe+2 is Ferrous and Fe3 is Ferric.
2)Same reason as 9th.
7)2 Pb(NO3)2(s) → 2 PbO (s) + 4 NO2(g) + O2(g)+
we have to balance Pb,O2,N in RHS AS WELL AS LHS So,by applying oxidation state method,we can balance the equation.
The reaction involves the breaking down of lead nitrate in three components;therefore it is categorised under decomposition redox reaction.
12)Because energy required to give the energy to NASCENT NITROGEN IN the Habours process will be very huge and cost would be high,So we use NITROGEN IN ZERO OXIDATION STATE INSTEAD OF +3 OXIDATION STATE IN 3H2+N2=2NH3
2 years ago
Jessica James
51 Points
										
thanku sir
 
2 years ago
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