PART II: CHEMISTRY
SECTION 1 (Maximum Marks: 12)
• This section contains FOUR (04) questions.
• Each question has FOUR options. ONLY ONE of these four options is the correct answer.
• For each question, choose the option corresponding to the correct answer.
• Answer to each question will be evaluated according to the following marking scheme:
Full Marks : +3 If ONLY the correct option is chosen.
Zero Marks : 0 If none of the options is chosen (i.e. the question is unanswered).
Negative Marks : -1 In all other cases.
The green colour produced in the borax bead test of a chromium(III) salt is due to
Text Solution
Verified by ExpertsD
Cr(BO 2 ) 3
Na 2 B 4 O 7 .10H 2 O 
Na 2 B 4 O 7 
NaBO 2 + B 2 O 3
Cr 2 O 3 +B 2 O 3 
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