10 গ্রাম জলে দ্রবীভূত পদার্থের 1.23 গ্রাম জলের স্ফুটনাঙ্ককে 100.39^(@)সে. এ উন্নীত করেছে...

In which of the following tables a and b vary directly? (i) a, 7, 9, 13, 21, 25 b, 21, 27, 39, 63, 75 (ii) a, 10, 20, 30, 40, 46 b, 5, 10, 15, 20, 23 (iii) a, 1^2 , 2^2 , 3^2 , 4^2 , 5^2 b, 1^3 , 2^3 , 3^3 , 4^3 , 5^3

At 100^(@)C the volume of 1 kg of water is 10^(-3) m^(3) and volume of 1 kg of steam at normal pressure is 1.671 m^(3) . The latent heat of steam is 2.3 xx 10^(6) J//kg and the normal pressure is 10^(5) N//m^(2) . If 5 kg of water at 100^(@)C is converted into steam, the increase in the internal energy of water in this process will be

In a period of 1.00 s, 5 xx 10^(23) nitrogen molecules strike a wall with an area of 8.00 cm^(2) . Assume the molecules move with a speed of 300 m//s and strike the wall head-on in elastic collisions. What is the pressure exerted on the wait? Note : The mass of one N_(2) molecules is 4.65 xx 10^(-26) kg

A sphere of alumininum of mass 0.047 kg placed for sufficient time in a vessel containing boling water, so that the sphere is at 100^(@)C . It is then immediately transferred to 0.14 kg copper calorimeter containing 0.25 kg of water at 20^(@) C . The temperature of water rises and attains a steady state at 23^(@)C . calculate the specific heat capacity of aluminum. Specific heat capacity of copper = 0.386 xx 10^(3) J kg^(-1) K^(-1) . Specific heat capacity of water = 4.18 xx 10^(-3) J kg^(-1) K^(-1)

A sphere of aluminium of 0.047 kg is placed for sufficient time in a vessel containing boiling water, so that the sphere is at 100^(@) C. It is then immediately transferred to 0.14 kg copper calorimeter containing 0.25 kg of water at 20^(@) C. The temperature of water rises and attains a steady state at 23^(@) Calculate the specific heat capacity of aluminium. (Give specific heat of copper =0.386xx10^(3)Jkg^(-1)K^(-1)) .

(a) 10 g of a certain non-volatile solute were dissolved in 100 g water at 20^(@) C . The vapour pressure was lowered from 17.3555 mm to 17.2350 mm , calculate m . wt. of solute. (b) The vapour pressure of pure water at 25^(@)C is 23.62 mm . What will be the vapour pressure of a solution of 1.5 g of urea in 50 g of water?