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1
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
A chemist has 4 samples of artificial sweetener A, B, C and D. To identify these samples, he performed certain experiments and noted the following observations :

(i) A and D both form blue-violet colour with ninhydrin.

(ii) Lassaigne extract of C gives positive AgNO3 test and negative Fe4[Fe(CN)6]3 test.

(iii) Lassaigne extract of B and D gives positive sodium nitroprusside test

Based on these observations which option is correct ?
A
A : Aspartame ; B : Alitame ; C : Saccharin ; D ; Sucralose
B
A : Alitame ; B : Saccharin ; C : Aspartame ; D ; Sucralose
C
A : Aspartame ; B : Saccharin ; C : Sucralose ; D ; Alitame
D
A : Saccharin ; B : Alitame ; C : Sucralose ; D ; Aspartame
2
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Match the following :
(i) Riboflavin    (a) Beriberi
(ii) Thiamine    (b) Scurvy
(iii) Pyridoxine   (c) Cheliosis
(iv) Ascorbic acid    (d) Convulsions
A
(i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)
B
(i)-(d), (ii)-(b), (iii)-(a), (iv)-(c)
C
(i)-c, (ii)-(a), (iii)-(d), (iv)-(b)
D
(i)-(a), (ii)-(d), (iii)-(c), (iv)-(b)
3
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Noradrenaline is a/an
A
Antacid
B
Antihistamine
C
Neurotransmitter
D
Antidepressant
4
JEE Main 2019 (Online) 11th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
The correct match between Item I and Item II is :

Item I Item II
(A) Allosteric effect (P) Molecule binding to the active site of enzyme
(B) Competitive inhibitor (Q) Molecule crucial for communication in the body
(C) Receptor
 (R) Molecule binding to a site other than the active site of
enzyme
(D) Poison (S) Molecule binding to the enzyme covalently
A
(A)$$ \to $$(P); (B)$$ \to $$(R); (C)$$ \to $$(Q); (D)$$ \to $$(S)
B
(A)$$ \to $$(P); (B)$$ \to $$(R); (C)$$ \to $$(S); (D)$$ \to $$(Q)
C
(A)$$ \to $$(R); (B)$$ \to $$(P); (C)$$ \to $$(S); (D)$$ \to $$(Q)
D
(A)$$ \to $$(R); (B)$$ \to $$(P); (C)$$ \to $$(Q); (D)$$ \to $$(S)
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