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true or false The air bubble has only one free surface. ...

An evacuated gass vessel weighs 50.0 g when empty, 148.0 g when filled with a liquid of density 0.98 gmL-1 and 50.5 g when filled with an ideal gas at 760 mm Hg at 300 K. Determine the molecular weight of the gas. ...

this is a easy one the equation of the image of the pair of rays y=|x| by the line x=2 is A)|y|=x+2 b)y=|x+4| c)y=|x-4| d)y=|x-2| ...

number of positive integral solutions of x1x2x3x4x5=1050 give method tooo ...

*Image* A spherical portion has been removed from a solid sphere having a charge distributed uniformly in its volume as shown in the figure. The electric field inside the emptied space is (A) zero everywhere (B) non-zero and ...

A:The rate of loss of optical activity during isotopic inversion SN2 is twice the rate of isotope exchange. B:SN2 reaction proceeds through inversion (i)Both true,B is the correct explanation of A (ii)Both true B is not the c ...

http://timesofindia.indiatimes.com/World/Pakistan-declared-world-heritage-country-/articleshow/4340876.cms ...

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*Image* *Image* whats the concept behind ...... this concept is asked frequently in the JEE ...

Q Among PCl3,CH3+,NH2-and NF3 ........................ is the least reactive towards water. GIVE REASON 4 UR ANSWER ...

In an experiment to determine the focal length (f) of a concave mirror by the u-v method, a student places an object pin A on the principal axis at a distance x from the pole P. The student looks at the pin and its inverted i ...

For the reaction N2O5 \Leftrightarrow 2NO2 + 0.5O2, calculate the mole fraction of N2O5 decomposed at a constant volume and temperature, if the initial pressure is 600 mm Hg and the pressure at any time is 960 mm Hg. Assume i ...

which of d following statements on critical constants of gases are correct. a) larger the t.c./pc value of the gas larger would be the excluded volume b) critical temperature of the gas is greater thatn its boyle temperature. ...

The compression factor (compressibilty factor) for aone mole of a van der waals gas at 0°C and 100 atm pressure is 0.5. Assuming that the volume of a gas molecule is negligible, calculate the Van der Waals constant a ...

One mole of nitrogen gas at 0.8 atm takes 38 seconds to diffuse through a pinhole, whereas one mole of an unknown compound of xenon with flourine at 1.6 atm takes 57 sec to diffuse through the same hole. Calculate the molecul ...

THe graph is plotted between PVm along Y axis and P along X axis, Vm is the molar volume of a real gas. Find the intercept on the Y axis. ...

Organic Chemistry Practice Multiple Choice Questions These questions are designed to give you practice with multiple choice questions. If you select the wrong answer, there are suggestions to help you see why that answer is n ...

WAT CONDITIONS DO V HAV TO IMPLY ON 2TAN(Î x) in the fol. functn ?? ( Q11) *Image* ...

The average velocity o fgas molecules is 400 m/s. Calculate its rms velocity at the sam etemperature.. ...

Just wanted to give u guys the formulas in properties of triangles. First of course is a diagram, which indicates all the parameters of a triangle I made it with paint...so pls forgive me if it is untidy *Image* ...

find the value of \sqrt{3}(sec55+cosec55) + sec55 - cosec55 surprisingly ,the answer consists of only 1 term(irrational) ...

WE hav discussed this once but a recent que. in Reso Test Series has forced me to ask agauin true / false if h(x) = f(x).g(x); f(x) is cont. at x = a while g(x) is discont at x =a then can h(x) be cont. at x = a ??? ...

find the condition on \lambda such that this eqn has real roots f(x) = \sqrt{3}\lambda x^4 - x^3 + 3\sqrt{3}\lambda According to the descartes rule,this eqn has either 2 or 0 roots,but i'm not getting any further frm here ...

Prove that from a point (a,b) of the circle x(x-a) + y(y-b) = 0, two chords, each bisected by the axis of x (rather x-axis), can be drawn if a2>8b2 [This is not my doubt, so provide complete solution for everyone's benefit ...

In a test ai students gave wrong answers to at least i questions where i=1,2,..........k.No student gave more than k wrong answers.THen total no. of wrong answers is given is???? ...

a large closed vessel of height H contains a liquid. at the intial moment, the height of the liquid in the vessel is H/2, the space above being filled with air at atmospheric pressure. when the height falls to H/4, find the v ...

\int_{0}^{\pi/3 }{(f'(3x)+f'''(3x))}cos3xdx=-5 find f"(0) +f"(\pi ) ...

1) The value of 50C6 - 5C1.40C6 + 5C2.30C6 - 5C3.20C6 + 5C4.10C6 is 2) The minimum value of (8x^{2}+y^{2}+z^{2})(\frac{1}{x}+\frac{1}{y}+\frac{1}{z})^{2} is 3) In a ΔABC, tanB/tanC = 2/3 and tanA.tanB.tanC=6 then the value(s ...

what is the significance of (1)Z>1 (2)Z<1???? ...

Simple HCV probs........... 1. A thin, metallic spherical shell contains a charge Q on it. A point charge q is placed at the centre of d shell and another charge q1 is placed outside it as shown in d fig. All d three charges ...