answer: B
doesnt 2nd one also have a double bond as it has a carboxylic acid so a double bond with the first oxygen?
A. KNO 3
B. CH 3**COONa
C. Na 2**CO 3
. [Fe(H *2O)* 6]Cl* 3
last one is the lowest
hi
some of my answers are incomplete, anyone feel free to add your feedback 
Qestion 1)
delocalized electrons happen if the double bond can alternate between being shared by one atom or another in the molecule
The electron would be shared if the molecule was CH3COO⁻, then the (-) charge would alternate between one O or the other, and the double bond would alternate as well
Since we have CH3COOH, one O participates in the double bond, while the other is covalently bonded to the H atom. It’s octet rule is fulfilled, it has no electrons left to share
Question 2)
Strong aicd + strong base = neutral solution and release heat of neutralisation
In both experiments, the same amount of NaOH is being neutralised, so the same heat should be produced, answer D)
Why is answer B) wrong?
Question 3)
a lattice is a crystaline structure. So lattice enthalpy is the heat needed to break a salt crystal (solid state) into individual elements, this is option III)
bit confused with the last two options, if I) is ionization energy exo or endothermic?
Question 4)
KNO3 + H2O = KOH + HNO3 = strong acid + strong base neutral ph=7
CH3COONa + H2O = CH3COOH + NaOH = weak A + strong B ph>7
Na2CO3 + 2H2O = 2NaOH + H2CO3 = strong B + weak A ph>7
[Fe(H2O)6]Cl3 + 3H2O = 3HCl + [Fe(H2O)6]OH)3 = strong A + weak B ph<7
is it true to say if a structure has resonance then it most probably has delocalized electrons?
even tho the heat of neutralization is equal the highest temperature produced will be different because we have different amount of HCl in two experiments.
but this question is a bit off as i checked also from chat gpt and it gave me confusing answers as well
U truly have those confusing and nerve wrenching questions, but kinda fun to solve those xD
ahahah so glad I got this answer because I was kinda thinking whether the questions I post are way too basic and time confusing!! glad to know :)))
have fun more of them is on the way 
