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1
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively.
A
ketoses, proteins
B
proteins, ketoses
C
aldoses, ketoses
D
ketoses, aldoses
2
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following is 'a' FALSE statement ?
A
Carius method is used for the estimation of nitrogen in an organic compound.
B
Kjeldahl's method is used for the estimation of nitrogen in an organic compound.
C
Carius tube is used in the estimation of sulphur in an organic compound.
D
Phosphoric acid produced on oxidation of phosphorus present in an organic compound is precipitated as Mg2P2O7 by adding magnesia mixture.
3
JEE Main 2021 (Online) 25th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?
A
Nitric acid
B
Sodium hydroxide
C
Ammonia
D
Hydrochloric acid
4
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If you spill a chemical toilet cleaning liquid on your hand, your first aid would be
A
aqueous NaOH
B
aqueous NaHCO3
C
aqueous NH3
D
vinegar
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