Messages posted by mohit choudhary

how many sigma bond are there in C2 molecule

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.

Now putting:-

solving we ge:-

now

is answer

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

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

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

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.

no of hydrogen bonds is 4

Fe3+ is more stable in comparison with fe2+ but the standard electrode potential for fe3+/fe2+ is positive. Why?

lim_x->0( tan2x+sin2x)/x³

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

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

now using lim_x->0 tanx/x=1

answer is 4.

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?

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

dsp²hybradization 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 sp³hybradization.For example in the complex compound Ni(CO₄) Hybradization of Ni is dsp² .

dsp²hybradization 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 sp³hybradization.For example in the complex compound Ni(CO₄) Hybradization of Ni is dsp² .

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

atom means 'undivisable'. we know atom is divisable so why the name has not been changed.

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

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