Atomic StructureHard
Question
Which of the following statement (s) are wrong ?
Options
A.Photons having energy 400 kJ will break 4 mole bonds of a molecule A2 where A - A bond dissociation energy is 100kJ/mol.
B.Two bulbs are emitting light having wavelength 2000
3000 respectively. If the bulbs A & B are 40 watt and 30watt respectively then the ratio of no. of photons emitted by A & B per day is 1/2.
3000 respectively. If the bulbs A & B are 40 watt and 30watt respectively then the ratio of no. of photons emitted by A & B per day is 1/2.C.When an electron make transition from lower to higher orbit, photon is emitted.
D.None of the above
Solution
(A) Since the number of photons is not specified (it may or may not be equal to 4 NA). So, this statement is not always true.
(B) No.of photon emitted per day × Energy of one photon = Energy emitted per day.
For bulb A,neA ×
× 1.6 × 10-19 = 40 × 24 × 3600.
For bulb B, neB ×
× 1.6 × 10-19 = 30 × 24 × 3600.
∴ neA : neB = 8 : 9.
(B) No.of photon emitted per day × Energy of one photon = Energy emitted per day.
For bulb A,neA ×
× 1.6 × 10-19 = 40 × 24 × 3600.For bulb B, neB ×
× 1.6 × 10-19 = 30 × 24 × 3600.∴ neA : neB = 8 : 9.
Create a free account to view solution
View Solution FreeMore Atomic Structure Questions
The threshold wavelength for ejection of electrons from a metal is 330 nm. The work function for the photoelectric emiss...Suppose the mass of electron is decreased by 25%. How will it affect the Rydberg constant?...What are the number of atoms per unit cell and the number of nearest neighbours in a body centered cubic structure?...The isoelectronic pair is :...A stationary He+ ion emitted a photon corresponding to the first line of the Lyman series. That photon liberated a photo...