1
JEE Main 2019 (Online) 10th January Evening Slot
+4
-1
The correct match between item 'I' and item 'II' is :

Item 'I' (compound) Item 'II'
(reagent)
(A) Lysine (P) 1-naphthol
(B) Furfural (Q) ninhydrin
(C) Benzylalcohol (R) KMnO4
(D) Styrene (S) Ceric ammonium
nitrate
A
(A)  $$\to$$  (Q);  (B)  $$\to$$  (R);  (C)  $$\to$$  (S);   (D)  $$\to$$  (P)
B
(A)  $$\to$$  (Q);  (B)  $$\to$$  (P);  (C)  $$\to$$  (S);   (D)  $$\to$$  (R)
C
(A)  $$\to$$  (R);  (B)  $$\to$$  (P);  (C)  $$\to$$  (Q);   (D)  $$\to$$  (S)
D
(A)  $$\to$$  (Q);  (B)  $$\to$$  (P);  (C)  $$\to$$  (R);   (D)  $$\to$$  (S)
2
JEE Main 2019 (Online) 10th January Morning Slot
+4
-1
If dichloromethane (DCM) and water (H2O) are used for differential extraction, which one of the following statements is correct ?
A
DCM and H2O would stay as upper and lower layer respectively in the separating funnel (S.F.)
B
DCM and H2O will make turbid/colloidal mixture
C
DCM and H2O would stay as lower and upper layer respectively in the separating funnel(S.F).
D
DCM and H2O will be miscible clearly
3
JEE Main 2019 (Online) 9th January Morning Slot
+4
-1
The correct match between Item-I and Item-II is :

Item-I (drug) Item-II (test)
A Chloroxylenol P Carbylamine test
B Norethindrone Q Sodium hydrogen carbonet test
C Sulphapyridine R Ferric chloride test
D Penicillin S Bayer's test
A
A $$\to$$ R;  B $$\to$$ P;  C $$\to$$ S;  D $$\to$$ Q
B
A $$\to$$ Q;  B $$\to$$ S;  C $$\to$$ P;  D $$\to$$ R
C
A $$\to$$ R;  B $$\to$$ S;  C $$\to$$ P;  D $$\to$$ Q
D
A $$\to$$ Q;  B $$\to$$ P;  C $$\to$$ S;  D $$\to$$ R
4
JEE Main 2018 (Online) 16th April Morning Slot
+4
-1
For standardizing NaOH solution, which of the following is used as a primary standard ?
A
Ferrous Ammonium Sulfate
B
dil. HCl
C
Oxalic acid
D
Sodium tetraborate
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