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Match List-I (Experiment performed) with List-II (Phenomena discovered/associated) and select the correct option from the options given below the lists List-I (a) Davisson and Germer experiment (b) Millikan's oil drop experiment (c) Rutherford experiment (d) Franck-Hertz experiment List-II (i) Wave nature of electrons (ii) Charge of an electron (iii) Quantisation of energy levels (iv) Existence of the nucleus

1. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
2. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
4. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

Correct answer: (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)

Solution

The correct matches reflect the discoveries associated with each experiment: Davisson and Germer demonstrated the wave nature of electrons, Millikan measured the charge of an electron, Rutherford's experiment revealed the existence of the nucleus, and Franck-Hertz showed the quantization of energy levels.

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