help@askiitians.com

+91-87964 74404

Grade 12Physical Chemistry

what is the wave no. for the longest wavelength transition in lyman series of atomic hydrogen spectrum

nidhi jaiswal

8 Years agoGrade 12

1 Answer

Umakant Biswal

8 Years ago

Dear nidhi
apply the equation
wave number = Rh ( 1/ n(1) ^2 – 1/(n2)^2 )
here u mentioned about lyman series and longest wavelength
so, n1 = 1 and n2=2
so, by putting the value
wave number = 109678 ( 1/(1)^2 – 1/(2)^2 )
wave number = 109678 ( 1/1 – 1/4)
= 109678 ( 1-1/4 ) = 109678 * ¾
kindly calculate the above and u will get the answer
HOPE IT CLEARS YOUR DOUBT
CHEERS

Which of the following aqueous solutions remains neutral after
electrolysis

physical chemistry

0 Answer Available

Last Activity: 3 Years ago

In the reaction A + 2B ⇌ 2C, if 2 moles of A, 3 moles of B and 2 moles of C are placed in a 2 L flask and
the equilibrium concentration of C is 0.5 mol/L. The equilibrium constant (KC) for the reaction is.....and please tell how you know that the reaction is going forward .. imean how to calculate the reaction quotient ???

physical chemistry

1 Answer Available

Last Activity: 3 Years ago

True or false when an electron in ground state of hydrogen atom is excited with an energy that is greayer than e2-e1 but less than e3-e1 the electron will get excited n=2

physical chemistry

1 Answer Available

Last Activity: 3 Years ago

18 19 gram mixture of na2co3 and nahco3 on heating gives 2.2 gram CO2 gas find the percent nahco3 (by mass) in mixture

physical chemistry

1 Answer Available

Last Activity: 4 Years ago

A 100 cm cube solution of sodium carbonate is prepared by dissolving 8.653 g of salt in water the density of solution is 1.0816g per ml what are the molarity and molality of the solution.

physical chemistry

1 Answer Available

Last Activity: 4 Years ago

View all Questions