LIST I Elements | LIST II Colour imparted to the flame | ||
A | K | 1 | Brick Red |
B | Ca | 2 | Violet |
C | Sr | 3 | Apple Green |
D | Ba | 4 | Crimson Red |
Correct answer is (d) A-II, B-I, C-IV, D-III
The flame test is used to identify elements based on the characteristic colors they emit when heated. The correct matching is:
Thus, the correct matching corresponds to option (4).
20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of the sodium iodide solution is _____ M. (Nearest Integer value) (Given : Na = 23, I = 127, Ag = 108, N = 14, O = 16 g mol$^{-1}$)