Question

Assertion: $Sn{l}_4$ is an orange solid.
Reason: The colour arises due to charge transfer.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

The orange colour of $Sn{l}_4$ is caused by the absorption of blue light, the reflected light thus containing a higher proportion of red and orange. The energy absorbed in this way causes the transfer of an electron from 1 to Sn. Since transferring an electron to another atom is transferring a charge, such spectra are called charge transfer spectra.