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  Dalton law of partial pressure. 1st year chemistry chapter 3 short questions notes. Dalton law of partial pressure class 11   Q) State Dalton's law of partial pressure. Why is it necessary that no forces of attractions should be there to obey this law?   Ans. Statement : Total pressure exerted by mixture of gases is equal to sum of individual partial  pressures of gases at given temperature.  Mathematically:    P t = P 1 + P 2 + P 3 If forces of attraction present between molecules of gases then total pressure will be less than individual partial pressure of gases. Therefore it is necessary that no forces of attraction should be there to obey this law.   Q) Define Mole fraction of gas. Ans. It is the ratio of number of moles of a gas to the total number of moles of gases present in a mixture. Its value always smaller than 1. Q) What is partial pressure? Give its formula. Ans. Partial pressure is the pressure which is exerted by a gas...

 A vogadro's law of gases . 1st year chemistry chapter 3 important short questions To watch lecture video of this topic on youtube please   click here What is Avogadro’s law of gases? Ans. Equal volume of all ideal gases contain equal number of molecules at S.T.P. Justify that 1 cm 3 of H 2 and 1 cm 3 of CH 4 at STP will have same number of molecules. When one molecule of CH 4 is 8 times heavier than that of hydrogen.   Ans. According to Avogadro’s law “ Equal volume of all ideal gases contain equal number of molecules at S.T.P.” 1 cm 3 of H 2 and 1 cm 3 of CH 4 have same volume so these have same number of molecules. No doubt CH 4 is 8 times heavier than that of hydrogen, but volume not depends upon sizes and masses of molecules.   Related searches of this topic: avogadro law state and explain avogadro's law define avogadro's law avogadro law class 11 example avogadro's law avogadro law class 11 avogadro law class 11 chemistry avogadro law che...

 General gas equation | 1st year chemistry chapter 3 important short questions | first year chemistry notes To watch lecture video of this topic on youtube please   click here How the value of the general gas constant ‘R’ can be derived with the help of Avogadro’s law? Ans. According to Avogadro’s law, the volume of one mole of all the ideal gases at S.T.P are 22.414 dm 3 . Putting the values of                 P = 1 atm                                           T = 273.16 K                                           V = 22.4 dm 3                                            n = 1 ...

1st year chemistry chapter 3 important short questions. Charles's law class 11. chemistry notes.  To watch lecture video of this topic on youtube please   click here   Define Charles’s law. Give its mathematical equation. Ans. Charles’s law : The volume of the given mass of a gas is directly proportional to the absolute temperature at constant pressure. Mathematically:     V/T  =K      OR      V 1 /T 1 = V 2 T 2  at constant P and   number of moles. Define Charles’s law in terms of absolute scale of temperature. Ans. At constant pressure, the volume of the given mass of a gas increases or decreases by 1/273 of its original volume at 0 o C for every 1 o C rise or fall in temperature respectively. Charles’s law is not obeyed when the temperature is measured on Celsius scale. Justify it Ans. Applying Charles’s law on given data in table It is observed that, two sides of equation are not equal. So...

  1st year chemistry notes chapter 1 short questions. Determination of relative atomic mass by mass spectrometry. First year chemistry chapter 1 mass spectrometry. Chemistry class 11 chapter 1 solved exercise. Mass spectrometer class 11 chemistry.  To watch lecture video of this topic on youtube please   click here   1.1- Define mass spectrometry? Ans. The technique in which atoms or molecules are converted to ions and are separated on the basis of mass to charge ratio is called mass spectrometry. 1.2- Define mass spectrometer? Ans. An instrument used to determine the exact masses of different isotopes of an element is called mass spectrometer. 1.3- Define mass spectrum? Ans. Mass spectrum is a plot of data in such a way that m/e value is plotted as x-axis and relative no. of ions as y-axis.   1.4- What is the difference between Aston’s mass spectrograph and Dempster’s mass spectrometer? Ans. a)   Aston’s mass spectrograph: Aston’s mass spectrograph...