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There is very little difference in the acid strength of H3PO2,H3PO3,H3PO4 because a)P is not a highly electronegative element b)The hydrogen atoms are not directly bonded to P atom c)Phosphorous exists in different oxidation ...

Why do Light waves projected on oil surface show seven colors ? ...

Just random thoughts coming to my mind... 1) We know tht in CuSO4.5H2O 4water moecules are coordinated n 1 is H-bonded. So when the hydrated salt is heated, initially, one water molecule remains. Is this the H-bonded one ? 2) ...

evaluate- cot^{2}\left(\frac{\pi }{11} \right)+cot^{2}\left(\frac{2\pi }{11} \right)+cot^{2}\left(\frac{3\pi }{11} \right)+cot^{2}\left(\frac{4\pi }{11} \right)+cot^{2}\left(\frac{5\pi }{11} \right) ...

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dbts which came to my mind while studying today.. Q1 can conc H3PO4 +conc HNO3 be used as nitrating mixture ?? Q2 we know acetylene is highly acidic...butg it never exists in soln in this form H-C≡C- +H+ ... why ??? Q3 why ...

1. What type of bonds are present in B2H6.2NH3 (Single Answer) (a) Banana Bond and covalent bond (b) Banana Bond and Ionic Bond (c) Banana Bond and Co-ordinate Bond (d) Ionic Bond, Covalent Bond & Co-ordinate Bond 2. Which of ...

Has anyone got the verification of the iitjee application form at the iitjee website? i have sent it just before december but am getting the reply that it hasnt yet been received. ...

In the arrengement shown here , one end of the spring just touches the surface of mercury contained in a metalic vessel,if the key is pressed on. *Image* (1)the spring stretches,attains equilibriunm (2)the spring compresses,a ...

In winter season we feel dat an iron bar is very cool to touch compared to a fire wood why it happens but we know that the temperature shud be the same. ...

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The set of integers is divided into n infinite APs. If the common differences of the APs are denoted by di, find \sum_{i=1}^n \frac{1}{d_i} ...

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1>what is Hinsberg test ?? 2>C6H5CH2I + NaN3 (at 390°C) → products .. What is the various possible products if the reaction is assumed to involve nitrene as an intermediate ? ...

∫1/1+x^16 ...

*Image* MERA [3]UTTAR[ANSWER][3] 1 AA RAHA HAI.........PUSTAK MEIN SHUNYA[ZERO] DIYA HAI............KAUN SA UTTAR SAHI HAI!!!![3] ...

show the graph of *Image* ...

Anyone giving above exams ??? do we have to attach anything other than fee with form ?? ...

∫ dx/sec x+cosec x and ∫ 1/3√x+4√x + log(1+x1/6)/ x + x dx ...

1) \int_{0}^{2a}\sqrt{2ax-x^{2}} 2) \int_{-1/2}^{1/2}\left ( [x]+ln(\frac{1+x}{1-x}) \right )dx 3) \int_{-2}^{2}\frac{3x^{5}+4x^{3}+2x^{2}+x+20}{x^{2}+4} ...

(a)Calicene has an unusually large dipole moment (ie. separation of charge) for a hydrocarbon. Explain using resonance structures. (b)Cyclopropanone is very reactive because of angle strain. Methylcyclopropanone is quite stab ...

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1) find the sum of the series \frac{1}{4!}+\frac{4!}{8!}+\frac{8!}{12!}................\infty 2) if a function defined such that f:R→R f(x)-2f(\frac{x}{2})+f(\frac{x}{4})=x^{2} find f(x) 1st one is a doubt[1] ...

A disc of mass m ,radius R is shown rolling on horz surface(having sufficient friction). Variation of magnetic and electric fields with direction exist along its path as shown in figure *Image* 1)Find velocity of disc after v ...

Given a cylinder which rolls on horz surface.It encounters a long tub (width=wR)filled with liquid of same density as cylinder.Will the cylinder continue to roll just after it comes out of liquid ?? *Image* ...

for x>1 evaluate \frac{x}{x+1}+\frac{x^{2}}{(x+1)(x^{2}+1)}+\frac{x^{4}}{(x+1)(x^{2}+1)(x^{4}+1)}...........\infty ...

Q1 If tan-14=4tan-1x then x5-7x3+5x2+2x+9870 is equal to ? ...

2\sqrt{2}sin10[\frac{sec5}{2}+\frac{cos40}{sin5}-2sin35] calculate without using trigo tables ...

*Image* Merry Christmas to everybody :) TargetIIT now has a brand new front page. We need your feedback & comments on this. Please drop in your inputs. Few links/things are currently broken & are not working, but they will be ...

Good prob flicked from another forum: Given complex numbers a,b,c,d such that \frac{a-d}{b-c} and \frac{b-d}{c-a} are purely imaginary, prove that \frac{c-d}{a-b} is also purely imaginary ...