1
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The presence of soluble fluoride ion upto 1 ppm concentration in drinking water, is :
A
safe for teeth
B
harmful to skin
C
harmful for teeth
D
harmful to bones
2
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the following reactions

A $$ \to $$ P1 ; B $$ \to $$ P2 ; C $$ \to $$ P3 ; D $$ \to $$ P4,

The order of the above reactions are a, b, c, and d, respectively. The following graph is obtained when log[rate] vs. log[conc.] are plotted JEE Main 2020 (Online) 6th September Morning Slot Chemistry - Chemical Kinetics and Nuclear Chemistry Question 85 English
Among the following, the correct sequence for the order of the reactions is :
A
d > b > a > c
B
d > a > b > c
C
a > b > c > d
D
c > a > b > d
3
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct statement with respect to dinitrogen is :
A
N2 is paramagnetic in nature
B
it can be used as an inert diluent for reactive chemicals
C
it can combine with dioxygen at 25oC
D
liquid dinitrogen is not used in cryosurgery
4
JEE Main 2020 (Online) 6th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Consider the Assertion and Reason given below.

Assertion (A) : Ethene polymerized in the presence of Ziegler Natta Catalyst at high temperature and pressure is used to make buckets and dustbins.

Reason (R) : High density polymers are closely packed and are chemically inert.

Choose the correct answer from the following:
A
Both (A) and (R) are correct and (R) is the correct explanation of (A).
B
Both (A) and (R) are correct but (R) is not the correct explanation of (A).
C
(A) is correct but (R) is wrong.
D
(A) and (R) both are wrong.
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