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0.7 g of N{a_2}C{O_3}.x{H_2}O is dissolved in 100 mL {H_2}O,20mL of which required 19.8 mL of 0.1 N HCl. The value of x is a) 4 b) 3 c) 2 d) 1 ...
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If {{m}_{1}} and {{m}_{2}} are the slopes of the tangents to the hyperbola frac{{{x}^{2}}}{25}-frac{{{y}^{2}}}{16}=1 which pass through the point (6, 2), then a) {{m}_{1}}+{{m}_{2}}=frac{24}{11} b) {{m}_{1}}{{m}_{2}}=frac{40} ...
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*Image* it is an infinite grid.. each segmnt of each resitance is R. all are equal squares.. to find resistance between A nd B ...
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Advanced 2 Q . 57 part (p) lim(x→0) √(2-2cosx)/2x = ? ...
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advance part 2; ques no. 56.. The least value of k for which 4/sinx + 1/1-sinx = k has a solution between ( 0, π/2 ) . ...
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*Image* The ring is rolling without slipping with a constant velocity "v", when a tangential force "F" is applied on it. What will be the net acceleration on the body.? ...
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Which one will be more easier to topple..? 1. A coin which is standing still. 2. A coin which is rolling on a surface without slipping. and WHY.? ...
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The equations of the common tangents to the circles x2 + y2-2x-6y+9=0 and x2+y2+6x-2y+1=0 is/are ? ...
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limx→0+ (sin x)sin x = ? ...
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The radius of an Xe atom is 1.3X10-8cm. A 100cm3 container is filled with Xe at a pressure of 1.0atm ans a temp of 273K. calculate the fraction of volume that is occupied by Xe atom?? ...
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The critical temperature and pressure of CO2 gas are 304.2K and 72.9atm respectively. What is the radius of CO2 molecule assuming it to behave as vander walls' gas? ...
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Vander waal's constant "b: for a gas os 4.2X10-2 lit mol-1 . How close the nuclei of the two molecules come together?? ...
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A one litre gas bulb contains 1.03*1023 H2 molecules. If the pressure exerted by these molecules is 760mm of Hg, what must be root average squared molecular speed?? ...
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The density of a gas at 1.5 atm is 1.52 g/litre. Calculate its r.m.s velocity. ...
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The rate of diffusion of a sample of ozonised oxygen is 0.98 times more than that of pure O2. Find the percentage (by volume) of ozone in the ozonized sample. also tell percentage by weight. ...
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4. A glass vessel weighs 40.1305g when clean dry and evacuated, 138.2410g when filled withwater at 25°C(d=0.9979 g/ml) & 40.2487g when filled with a gas at 740.4 torr and 24.1°C. What is the molecular weight of gas? ...
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3. A vessel contains a mixture of 7g of N_2 & 11g of CO_2 at temp 290K. if pressure of the mixture is 1atm, calculate its density. ...
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2. If chlorine gas is 70 moles percent dissociated at 2000 k and I am pressure to form atomic chlorine, calculate the density of the mixture of gas? ...
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1. One litre water in a bucket is placed in a closed dry air room having dimensions 4*2*1.5 m^3 at 300K. If the vapour pressure of water at 300K is 27.0mm and density of water at 300K is 0.990 g cm^(-3), calculate the amount ...
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A gaseous mixture contains 4 molecules with a velocity of 6 cm {sec ^{ - 1}}, 5 molecules with a velocity of 2 cm and 10 molecules with a velocity of 3 cm what is the RMS velocity of the gas – ...
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Which of the following is an expression of ideal gas equation- ...
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Phosphorous can form PH3 but no PH5 . why??? ...
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Electronegativity of C & O in carbon-monoxide suggests it to be polar. But in reality it is not so. Why? ...
