Q 1 :    

Match List I with List II.

	List I (Alkali Metal)		List II (Emission Wavelength in nm)
A.	Li	I.	589.2
B.	Na	II.	455.5
C.	Rb	III.	670.8
D.	Cs	IV.	780.0

 

Choose the correct answer from the options given below:               [2024]

• (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

   

• (A)-(IV), (B)-(II), (C)-(I), (D)-(III)

   

• (A)-(II), (B)-(IV), (C)-(III), (D)-(I)

   

• (A)-(I), (B)-(IV), (C)-(III), (D)-(II)

   

Q 2 :    

A hypothetical electromagnetic wave is shown below. 

The frequency of the wave is $\mathrm{x}\times {10}^{19}\mathrm{Hz}.\mathrm{x}=$________ (nearest integer)           [2024]