1.

Which of the following statement (s) are wrong?

Answer»

Photons having energy `400 kJ` will break `4` mole bonds of a moiecule `A_(2)` where `A-A` bond dissociation energy is `100 kJ//mol`.
TWO bulbs are emitting light having wavelenght `2000Å` & `3000 Å` respectively. If the bulbs `A` & `B` are `40` watt and `30` watt respectively then the ratio of no. of photons emitted by `A` & `B` PER day is `1:2`
When an electron make transition from LOWER to higher orbit, PHOTON is emitted.
None of these

Solution :(A) Since the NUMBER of photons is not specified `("it may or may not be equal to" 4 N_(A))`. So, this statement is not always true.
(B) No. of photon emitted per day xx Energy of one photon =energy emitted per day.
For bulb `A, n_(e_(A))xx12400/2000xx1.6xx10^(-19)=40xx24xx3600`
For bulb `B, n_(e_(B))xx12400/3000xx1.6xx10^(-19)=30xx24xx3600`
`:. n_(e_(A)): n_(e_(B))=8:9`.


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