MEDIUMMCQ SINGLENEET ChemistryInorganic Chemistryp-Block (group 13 and 14)Previous Year Questions
Assertion: Coloured cations can be identified by borax bead test. Reason: Transparent bead (NaBO2 + B2O3) forms coloured bead with coloured cation. (AIIMS 2009)
A.Both Assertion and Reason are true and Reason is✓ Correct
B.Both Assertion and Reason are true but Reason is
C.Assertion is true but Reason is false.
D.Both Assertion and Reason are false.
Explanation
Borax bead test is used to identify cations by qualitative analysis. When borax is heated at , it leads to the formation of a glassy bead and it gives different colour beads with different cations. The following reaction is shown below: Hence, the correct option is (a).