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A queen is placed at a corner of a chess-board.Two squares other than where the queen is placed on are chosen at random.What is the probability that the chosen squares both are in under attack by the Queen ? ...
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Which of the following(s) is(are) correct? ...
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In the depression of freezing point experiment, it is found that the ...
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Z1 , Z2 are two complex numbers such that |Z1|=3 and |Z2 - 12 - 16i|=20 .What is the sum of minimum and maximum value of |Z1 - Z2| ? ...
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Multiple Correct Answers Follow In the dissociation of 2AB [eq] A2+B2 , The degree of dissociation is affected by ...
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The elevation is boiling point of a solution of 13.44 g of CuCl2 in 1 kg of water using the following information will be (M CuCl2=134.4 and Kb=0.52 K/molal) ...
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Which of the reaction defines ΔHf0? ...
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The pH of 0.1 M solution of the following salts increases in the order ...
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A solution of Palmitic acid (M= 256) in benzene contains 4.24 g of acid per dm3 . When this solution is dropped on a water surface , benzene evaporates and the acid forms a monomolecular layer film of the solid type . If ...
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2NO (g) + O2(g) [eq] 2NO2 (g) ; K1 2NO2 (g) [eq] N2O4 (g) ; K2 2NO(g) + O2 (g) [eq] N2O4 (g) ; K3 which of the following relation is correct ? ...
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N2O4 [eq] 2NO2 N2O4 is 20% dissociated at 27°C and 1 atm pressure. Find the % dissociation at 27°C and 0.1 atm pressure ...
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In an AP series sum of first 12 terms is equal to the sum of first 18 terms.What is the value of sum of first 30 terms ? ...
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The vapour pressure of pure benzene is 639.7 mm of mercury and the vapour pressure of a solution of solute in benzene at the same temperature is 631.9 mm of mercury. The molality of the solution is ...
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a,b,c are three positive numbers and are in AP.If abc = 8 , what is the minimum value of b? ...
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In the above question , what is the force exerted by the top fluid ? Area of cross-section of the block is S. ...
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*Image* A block of density Ï floats in equilibrium in a tank filled with two different liquids as shown.what is the value of 'l' ? ...
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*Image* The plot of kinetic energy vs time of a particle performing SHM is shown in above figure.What can be inferred from the graph ? ...
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*Image* A particle executes SHM along Y axis according to the equation y = Asinωt.A light source is at a distance d from Y axis and a screen is at a distance 'nd' from Y axis as shown.What is the amplitude of the ...
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A ring of total mass M and radius a has a linear mass density λ = λocosφ , φ being the reference angle.What is the gravitational potential produced by the ring at the centre ? ...
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*Image* A tank filled with liquid of density Ï is given an acceleration a towards right.The tank is in the shape of a cube of side 'l' and it is closed from all sides.What is the pressure at P ? ...
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*Image* In the above system the spring has a mass M and the block has a mass m.The spring constant is K.If the block is given an initial velocity Vo what is the maximum elongation of the spring? ...
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*Image* The tank filled with water is rotated about an axis as shown in figure.The left wall and the right wall of the tank are located at a distance r1 and r2 from the axis respectively.During rotation if the height of liqui ...
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*Image* Left block is given an initial velocity Vo towards right.Which of the following equation describes the velocity of centre of mass ? ...
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What is the probability that a particle doing SHM with amplitude A is at a distance ±A/2 from the mean at a certain instant of time ? ...
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Statement I - If a spring is broken down to small springs , each of the resulting spring has a higher stiffness than the original spring. Statement II - Since force goes un-diminished in a spring and product of stiffness and ...
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Statement I - Machine parts are jammed in winter. Statment II - Viscosity increases with fall in temperature. ...
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Statement I - Value of g at centre of earth and at infinity is zero. Statement II - The rate of decrease of 'g' is constant with depth but variable with height. ...
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Which of the following is true ? ...
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When two soap bubbles coalesce to form a single soap bubble , ...
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Which of the following is true ? ...
asked2009-04-15 21:12:46