1
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Compound A is converted to B on reaction with CHCl3 and KOH. The compound B is toxic and can be decomposed by C. A, B and C respectively are :
A
primary amine, nitrile compound, conc. HCl
B
secondary amine, isonitrile compound, conc. NaOH
C
primary amine, isonitrile compound, conc. HCl
D
secondary amine, nitrile compound, conc. NaOH
2
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The conditions given below are in the context of observing Tyndall effect in colloidal solutions :

(A) The diameter of the colloidal particles is comparable to the wavelength of light used.

(B) The diameter of the colloidal particles is much smaller than the wavelength of light used.

(C) The diameter of the colloidal particles is much larger than the wavelength of light used.

(D) The refractive indices of the dispersed phase and the dispersion medium are comparable.

(E) The dispersed phase has a very different refractive index from the dispersion medium.

Choose the most appropriate conditions from the options given below :
A
(A) and (E) only
B
(C) and (D) only
C
(A) and (D) only
D
(B) and (E) only
3
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the incorrect statement from the following
A
Amylose is a branched chain polymer of glucose
B
Starch is a polymer of $$\alpha$$-D glucose
C
$$\beta$$-Glycosidic linkage makes cellulose polymer
D
Glycogen is called as animal starch
4
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
JEE Main 2021 (Online) 20th July Morning Shift Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 111 English
Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?
A
(I), (III) and (IV) only
B
Only (IV)
C
Only (II)
D
(III) and (IV) only
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