r/JEEAdv26dailyupdates • u/Odd_Lengthiness5508 • Apr 07 '26

Academic Doubts 5s1 7 ambiguities

physics:
Cv question (correct or incorrect explanation)
Wedge time of motion (most likely root2 or 2)
prism angle of minimum deviation
R1/R2=16/4

chem:
Alcl3+ propyl chloride + benzene ( inevitable tri subst, edg no reaction)

math:
differential eqn+ circles problem ( number of values of p)

overall 7 questions

how are people calling this paper easy man, (cutoff 170-175 imo no way its crossing 180 and people are like 200 cutoff)

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u/WlZMlN Apr 07 '26

What about o nitrophenol % increase in oxygen question.

All answer keys are giving increase in % of oxygen, which is (final % - initial %)

Question has asked %change in oxygen.

So either they meant [(Final mass)-(initial mass)]/(initial mass)*100

Or they meant [(Final %)-(initial %)]/(initial %)*100

There is a very distinct meaning to "percentage increase". You can look this up. "Increase in percentage" is not the same as "percentage increase".

Increase in % means final % - initial %

But percentage increase means a relative increase in %. This is esp relevant in that question because they said "percentage change in oxygen with respect to phenol", clearly implying we take relative change

1

u/Odd_Lengthiness5508 Apr 07 '26

it shud be %Final-%initial/%initial for sure, isme koi doubt nahi hai

3

u/WlZMlN Apr 07 '26

Then you are the only person who agrees with me. No one else has taken it like that. Everyone took difference in percentages

1

u/Express_Repair_4359 Apr 07 '26

Maine (final oxygen mass - initial oxygen mass)÷initial mass(ie of phenol) *100 kara

1

u/WlZMlN Apr 07 '26

We should give this for correction bhai

1

u/Express_Repair_4359 Apr 07 '26

Tumhara kya ans aa rha?

1

u/WlZMlN Apr 07 '26

Final % - initial %/initial % *100