IIT JEE , AIEEE Forum - Mathematics , Differential Calculus

ashish040191

1)Derivativ of mod(x) is undefined but its double derivative is, why?

------------Chem:-

2)HOF, HOBr r not formed but HOCl is stable, why?

3) titration is important for IIT or not?

4)why there is huge diff in energy of 5d &4f but there is very slight diff in energy of 6d & 5f?

neeraj_agarwal_1990

Who said derivative of |x| is undefined??
its derivative is |x|/x.

(not differentiable at x=0)

see the fist derivative...u can call it as the locus of slopes of tangents drawn to the graph .
so it being defined or undefined(at a point) is not related with double derivative.

magiclko

Fluorine has no oxy-acids. Fluorine is so hard to oxidize that no H⁺ FO^- exists

so HOF doesnt exist...

but rest oxyacids exists... with acidic order HClO > HBrO > HIO

For HOCl,

Cl^- + 2OH^- <-----> ClO^- + H₂O + 2e^- -0.90 V

while oxidation potential for Br^- , is even more negative, hence its difficult to get BrO^- ion.... or can say that reduction potential of BrO^->reduction potential of ClO^-, so it easily gets reduced, thus being unstable

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