1
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (More than One Correct Answer)
+4
-1
Change Language
Henry’s constant (in kbar) for four gases $$\alpha $$, $$\beta $$, $$\gamma $$ and $$\delta $$ in water at 298 K is given below :

$$\alpha $$ $$\beta $$ $$\gamma $$ $$\delta $$
KH 50 2 2 $$ \times $$ 10-5 0.5

(density of water = 103 kg m-3 at 298 K)
This table implies that :
A
solubility of $$\gamma $$ at 308 K is lower than at 298 K
B
The pressure of a 55.5 molal solution of $$\delta $$ is 250 bar
C
$$\alpha $$ has the highest solubility in water at a given pressure
D
The pressure of a 55.5 molal solution of $$\gamma $$ is 1 bar
2
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The atomic number of the element unnilennium is :
A
109
B
102
C
119
D
108
3
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The mechanism of SN1 reaction is given as : JEE Main 2020 (Online) 3rd September Morning Slot Chemistry - Haloalkanes and Haloarenes Question 85 English
A student writes general characteristics based on the given mechanism as :
(a) The reaction is favoured by weak nucleophiles.
(b) R+ would be easily formed if the substituents are bulky.
(c) The reaction is accompanied by racemization.
(d) The reaction is favoured by non-polar solvents.
A
(a) and (b)
B
(a), (b) and (c)
C
(a) and (c)
D
(b) and (d)
4
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Tyndall effect is observed when:
A
The diameter of dispersed particles is similar to the wavelenght of light used.
B
The diameter of dispersed particles is much smaller than the wavelength of light used.
C
The diameter of dispersed particles is much larger than the wavelength of light used.
D
The refractive index of dispersed phase is greater than that of the dispersion medium.
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