2,4-DNP test for aldehydes and ketones

This type of question, asked 2 times: 2021 Paper 16, 2021 Paper 26. All 2 questions below, oldest first.

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Question 1
2021 Paper 16
31 $Which gives orange colour with 2,4 DNP?$
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Question 2
2021 Paper 26
31 $2,4-DNP test can be used to identify:$
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