Q19 / 90 · JEE Main 2023 (31 Jan Shift 2) · Chemistry

Given below are two statements :
Statement I : Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.
Statement II : The green colour observed is due to the formation of copper(I) metaborate In the light of the above statements, choose the most appropriate answer from the options given below:

  • Correct answer
    A
    Both Statement I and Statement II are false
  • B
    Both Statement I and Statement II are true
  • C
    Statement I is false but Statement II is true
  • D
    Statement I is true but Statement II is false

Solution

Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes blue. Blue colour is observed due to copper (II) metaborate while copper (I) is colourless,

Hence, the correct answer is option: 'A'.

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