1
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Butan -1- ol has higher boiling point than ethoxyethane.

Reason R: Extensive hydrogen bonding leads to stronger association of molecules.

In the light of the above statements, choose the correct answer from the options given below:

A
A is false but R is true
B
Both A and R are true but R is not the correct explanation of A
C
Both A and R are true and R is the correct explanation of A
D
A is true but R is false
2
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following complex is octahedral, diamagnetic and the most stable?

A
$$\mathrm{Na}_{3}\left[\mathrm{CoCl}_{6}\right]$$
B
$$\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}$$
C
$$\mathrm{K}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$$
D
$$\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{2}$$
3
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Match List I with List II:

LIST I
(Species)
LIST II
(Maximum allowed concentration in ppm in drinking water)
A. $$\mathrm{F^-}$$ I. < 50 ppm
B. $$\mathrm{SO_4^{2-}}$$ II. < 5 ppm
C. $$\mathrm{NO_3^-}$$ III. < 2 ppm
D. $$\mathrm{Zn}$$ IV. < 500 ppm

Choose the correct answer from the options given below :

A
A-IV, B-III, C-II, D-I
B
A-I, B-II, C-III, D-IV
C
A-II, B-I, C-III, D-IV
D
A-III, B-IV C-I, D-II
4
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct order of electronegativity for given elements is:

A
$$ \mathrm{C}>\mathrm{P}>\mathrm{At}>\mathrm{Br}$$
B
$$\mathrm{Br}>\mathrm{C}>\mathrm{At}>\mathrm{P}$$
C
$$\mathrm{Br}>\mathrm{P}>\mathrm{At}>\mathrm{C}$$
D
$$\mathrm{P}>\mathrm{Br}>\mathrm{C}>\mathrm{At}$$
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