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i haven,t received the previous paper so please send this one to ashish_master2@yahoo.co.in

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a sample of metal weighs 210g in air, 180g in water and 120g in an unknown liquid. then density of metal is

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a lead sphere of mass m falls in a viscous liquid with terminal velocity v. another sphere of mass M falls through the same viscous liquid with terminal velocity 4v. the ratio M/m is..

is the answer 26% if yes tell me i will explain

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a block of massM with a semicircular track of Radiur R rests on a horizontal frictionless surface. a uniform cylinder of radius r and mass m is released from from rest at a point on the start of semicircular track. the cylinder slips on the semicircular frictionless track. when cylinder reaches the bottom point Q, the distance moved by block is ?

Entropy,S =2.303 K log W
W = no. of ways by which that state can be achieved
K = Boltzmann's constant

So by keeping W constant we can keep entropy constant

At equalibirium the slope of the graph between delta G and equalibirium mixture of reaction progress becomes zero. Therefore, delta G = 0 and according to equation,
delta G = delta G not + RT log Q
Delta G not = -RT log K
Delta G not is the standard free energy change.

Here the K you r asking of is the solubility product not the equilibrium constant.

What volume of O₂ would be liberated from an aquous sol. of NaOH by a current of 2A passed for 1.5hrs. (Temp. = 27⁰ and pressure = 1 atm )