JEE Main 2022 Chemistry question

Match List-I with List-II. List-I (Metal): (A) Li (B) Na (C) Rb (D) Cs List-II (Emitted light wavelength (nm)): (I) 670.8 (II) 589.2 (III) 780.0 (IV) 455.5 Choose the most appropriate answer from the options given below:

(1)(A)-(I), (B)-(II), (C)-(III), (D)-(IV)Correct
(2)(A)-(III), (B)-(II), (C)-(I), (D)-(IV)
(3)(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
(4)(A)-(IV), (B)-(I), (C)-(II), (D)-(III)

Answer: (1)

Solution

The flame colours and wavelengths are: Li, crimson red, 670.8 nm; Na, yellow, 589.2 nm;

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Question ID VK-035294