1
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound?
A
H3C – CH2 – Br
B
H3C – Br
C
JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Practical Organic Chemistry Question 70 English Option 3
D
JEE Main 2020 (Online) 2nd September Morning Slot Chemistry - Practical Organic Chemistry Question 70 English Option 4
2
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
A, B and C are three biomolecules. The results of the tests performed on them are given below:

$$ \begin{array}{|l|l|l|l|} \hline & \begin{array}{l} \text { Molisch's } \\ \text { Test } \end{array} & \begin{array}{l} \text { Barfoed } \\ \text { Test } \end{array} & \begin{array}{l} \text { Biuret } \\ \text { Test } \end{array} \\ \hline \text { A } & \text { Positive } & \text { Negative } & \text { Negative } \\ \hline \text { B } & \text { Positive } & \text { Positive } & \text { Negative } \\ \hline \text { C } & \text { Negative } & \text { Negative } & \text { Positive } \\ \hline \end{array} $$

A, B and C are respectively :
A
A = Lactose, B = Glucose, C = Albumin
B
A = Lactose, B = Fructose, C = Alanine
C
A = Lactose, B = Glucose, C = Alanine
D
A = Glucose, B = Fructose, C = Albumin
3
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal acetate was extracted initially with a saturated solution of NaHCO3 to give fraction A. The left over organic phase was extracted with dilute NaoH solution tio give fraction B. The final organiic layer was labelled as fraction C. Fractions A,B and C, contain respectively :
A
m-chlorobenzoic acid, m-chloroaniline and m-chlorophenol.
B
m-chlorobenzoic acid, m-chlorophenol and m-chloroaniline.
C
m-chlorophenol, m-chlorobenzoic acid and m-chloronailine.
D
m-chloroaniline m-chlorobenzoic acid and m-chlorophenol.
4
JEE Main 2019 (Online) 12th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
An organic compound 'A' is oxidizod with Na2O2 followed by boiling with HNO3. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate.
Based on above observation, the element present in the given compound is:
A
Fluorine
B
Phosphorus
C
Nitrogen
D
Sulphur
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