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explain the physical significance of van der waals parameter?
on what factors does the surface tension depends?
i. Which type of intermolecular forces exist between NaCl and H2O
ii. What will be the pressure of the gaseous mixture when 0.5 L of H2 at 0.8 bar and 2.0 L of O2 at 0.7 bar are introduced in a 1 L vessel at 27C?
Why 2nd Electron Gain Enthalpy of oxygen is positive?
by sucking through a straw a student can reduce the pressure in his lungs to 750mm of mercury density=13.6gm/cm3 using the straw he can drink water from a glass upto a maximum depth of
a) 10cm b) 75cm 3) 13.6cm 4)1.36cm
Explain why liquids like ether and acetone are kept in cool places?
Strongest Base --
Be(OH)2 , Mg(OH)2 , Al(OH)3 , Si(OH)4
The drain cleaner, Drainex contains small bits of aluminium which react with caustic soda to produce dihydrogen. What volume of dihydrogen at 20C and one bar will be released when 0.15g of aluminium reacts?
when salt or sugar are poured into different kinds of vessels why do they take the shape of the vessel?
DIFFERENCE BETWEEN REAL GAS AND IDEAL GAS (IN POINTS)
why gases do not settle down at the bottom of the container when kept in it?
What will be the graph between log p and inverse of log v ?
What are polar and non- polar molecules?
prove that PV=1/3 mNc2
how do we do hybridisation for hcooh
the volume of a gas at 0 degree C and 700mm Pressure is 760 cc. the no. of molecules present in this volume is___?
how many pi bonds & sigma bonds are there in napthalene? reply asap!!
boiling of a liquid cannot occur in a closed vessel.comment on the statement
EQUAL MASSES OF SO2, CH4, 02 ARE MIXED IN EMPTY CONTAINER AT 298 K , TOTAL PRESSURE IS 2.1 ATM . THE PARTIAL PRESSURE OF CH4 IN THE MIXTURE IS ??METHOD????1) 0.5 ATM2) 0.75 ATM3) 1.2 ATM4) 0.6 ATM
Why rain drops are spherical ?
explain why o-hydroxy benzaldehyde is liquid at room temp. while p-hydroxy benzaldehyde is a high melting solid?
x ml of H2 effuse through a hole in a container in 5 sec.the time taken for the effusionof same volume of the gas specified below under identical condition is
A gaseous mixture contains oxygen and another unknown gas in the molar ratio 4:1 diffuses through a porous plug in 245 seconds. Under simillar conditions same volume of oxygen takes 220 seconds to diffuse. Find the molecular mass of the unknown gas.
(Q.) Calculate the pressure exerted by 1 mol of CO2 at 273 K if the van der Waal’s constant ‘a’= 3.592 dm6atm mol-. Assume that the volume occupied by CO2 molecules is negligible.
what is STP and NTP???
reply soon :)
the surface tension of which of the following liquids is maximum and why?
a)C2H5OH b)CH3OH c)H2O d)C6H6
a certain gas takes 3 times as long to effuse out as helium.what will be its molecular mass?
what should be the percentage increase in pressure for 5% decrease in volume?
calculate the temperature at which the average speed of oxygen equals that of hydrogen at 20K.
A mixture of hydrogen and oxygen at 1 bar pressure contains 20% by mass of Hydrogen .Calculate the partial pressure of hydrogen .
What do you mean by NTP (normal temperature and pressure) and STP (standard temperature and pressure)?
Can u explain me Liquefaction of Gases?
the weight of 1 mole of agas of density 0.1784g/L at NTP is ___?
why do gases show deviation from ideal behaviour?
At 500k temperature in 2 liter vessel 0.325gm O2 gas is collected over water. If the vapour pressure of water is 32 bar at 500k, find the partial pressure of dry O2 gas?
a balloon filled with an ideal gas is taken from the surface of the sea deep to a depth of 100m , what will be its volume in terms of its original volume?
What are : a) Isotherms
how to make a project on adulteration of food in chemistry ... what should be the contents of it?
0.6 g of a gas at 150C and 745 mmHg occupies 200 cm3 .It occupies 182.6 cm3 in dry state at N.T.P. Calculate the aqueous tension at 150 C.
Why Heavy water is used as moderators in nuclear reactions? And, can ordinary water act as moderators instead heavy water or not? If yes please or if no how and why?
Why are vegetables cooked with difficulty at a hill station?
A quantity of an ideal gas is collected in a graduated tube over the mercury. The volume of gas at 20.C is 50 ml and the level of the mercury is 100mm above the outside of the mercury level. The atmospheric pressure is 750mm. Volume of gas at STP is? (Take R = 0.083 litre atm/mole )
at certain mixture of helium and argon weighing 5g occupies a volume of 10 l at 25 degreec and 1 atm pressur. wha t is the composition of the mixture in mass pecentage ?
what is the unit of the constants in van der waal's equation?
plzzzzzzzzz answer as soon as possible
what is rotating polar molecule?
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