Q.
Match List-I with List-II :
List-I
(Salt)
List-II
(Flame colour wavelength)
(a)
$LiCl$
(i)
$455.5 nm$
(b)
$NaCl$
(ii)
$670.8 nm$
(c)
$RbCl$
(iii)
$780.0 nm$
(d)
$CsCl$
(iv)
$589.2 nm$
Choose the correct answer from the options given below :
| List-I (Salt) |
List-II (Flame colour wavelength) |
||
|---|---|---|---|
| (a) | $LiCl$ | (i) | $455.5 nm$ |
| (b) | $NaCl$ | (ii) | $670.8 nm$ |
| (c) | $RbCl$ | (iii) | $780.0 nm$ |
| (d) | $CsCl$ | (iv) | $589.2 nm$ |
Solution:
Colour
$\lambda / nm$
Li
Crimson red
670.8
Na
Yellow
589.2
Rb
Red violet
780.0
Cs
Blue
455.5
| Colour | $\lambda / nm$ | |
| Li | Crimson red | 670.8 |
| Na | Yellow | 589.2 |
| Rb | Red violet | 780.0 |
| Cs | Blue | 455.5 |