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 mohit choudhary's messages in the community
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 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]
how many sigma bond are there in C2 molecule
 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Let us consider a function y=f{x} an open interval (a,b).For finding maxima or minima we find critical points where either

or the function is not continous.Suppose we find 4 critical points i.e. x1 ,x2   ,a and b.

These critical point includes the end points.Now if we get local maxima from x1 and a & local minima from x2 and b.

Now absolute maxima and minima only exits if we get the ponts from x1 or x2 .

No absolute maxima and minimaexists if point is from open interval i.e. a or b.

 Discussion Forums -> This Post 10 points    (2    in 2 votes )   [?]

Now putting:-

solving we ge:-

now

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

In SHM omega represents the angular frequency or angular speed. It is the magnitude of angular velocity actualy.

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

I  think the question is not correct.It shouid be a20 instead of a19 in the question.

let the first term be a and the common difference be d then from the given information -

a+(a+4d)+(a+9d)+(a+14d)+(a+19d)+(a+23d)=225

6a+69d=225

2a+23d=75

Now solving the problem-

a1 +a2 +a3 +-------+a24 =24a+276d=12(2a+23d)=12*75=900

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

as we know mass is costant.then why scientists searching for evidences to prove that inertial and gravitational masses are equivalent or same?

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

Shell refers to a hollow sphere.A thin shell is one whose thickness is such that it can be neglected for calculations and inner and outer radius are taken to be same but in case of thick shells the thickness can't be neglected and calculation is done while including the inner and outer radius.

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

no of hydrogen bonds is 4

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]
Fe3+ is more stable in comparison with fe2+ but the standard electrode potential for fe3+/fe2+ is positive. Why?
 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

limx->0  ( tan2x+sin2x)/x3

limx->0  [(2tanx/1-tan2 x)+(2tanx/1+tan2 x)]/x3

limx->0 (2tanx.2tan2 x)/1-tan4 x . x3

now using limx->0 tanx/x=1

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

when we brominate butane using ccl4 as a solvent we get di bromo butane. now in order to get alkyne from alkyldihalide we make this to react with KOH alchohlic.  here beta elimination reaction takes place giving you the desired product?

 Discussion Forums -> This Post 5 points    (1    in 1 votes )   [?]

for alkali metals reactivity is based on the ease with which they lose electrons hence Cs bieng most electropositive loses electrons readily hence reactivity increases as we go down the group whereas in case of halogens reactivity is based on their affinity to electrons hence flourine being most electronegative has highest reactivityin the group hence reactivity decreases as we down the group in halogens

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

dsp2 hybradization is an inner orbital hybradization in which (n-1)d orbital is used  instead of nd orbital.The geometry in this case is square planar geometery . It is analogous to sp3 hybradization.For example in the complex compound Ni(CO)  Hybradization of Ni is dsp2   .

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

dsp2 hybradization is an inner orbital hybradization in which (n-1)d orbital is used  instead of nd orbital.The geometry in this case is square planar geometery . It is analogous to sp3 hybradization.For example in the complex compound Ni(CO)  Hybradization of Ni is dsp2   .

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

the answer to this  is (tan- sinx / x)+c

 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]
atom means 'undivisable'. we know atom is divisable so why the name has not been changed.
 Discussion Forums -> This Post 0 points    (0    in 0 votes )   [?]

atom is the smallest fundamental unit of a matter consisting of subatomic particles

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