JEE Main 2026 Chemistry question
Identify the INCORRECT statements from the following:
A. Notation Mg-24-12 represents 24 protons and 12 neutrons.
B. Wavelength of a radiation of frequency 4.5 × 1015 s-1 is 6.7 × 10-8 m .
C . One radiation has wavelength = λ1 (900 nm) and energy = E1 .
Other radiation has wavelength = λ2 (300 nm) and energy = E2, E1 : E2 = 3 : 1 .
D. Number of photons of light of wavelength 2000 pm that provides 1 J of energy is 1.006 × 1016 .
Choose the correct answer from the options given below:
Answer: 2
Solution
(A) Mg-24-12 represents 12 protons and 12 neutrons.
(B) λ = = = 6.67 × \ m .
(C) = {hC/
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