NTA JEE Main 24th February 2021 Shift 2

According to Bohr's atomic theory:
(A) Kinetic energy of electron is $$\propto \frac{Z^2}{n^2}$$.
(B) The product of velocity (v) of electron and principal quantum number (n), $$'vn' \propto Z^2$$.
(C) Frequency of revolution of electron in an orbit is $$\propto \frac{Z^3}{n^3}$$.
(D) Coulombic force of attraction on the electron is $$\propto \frac{Z^3}{n^4}$$.
Choose the most appropriate answer from the options given below:

The correct set from the following in which both pairs are in correct order of melting point is:

The correct shape and I - I - I bond angles respectively in $$I_3^-$$ ion are:

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.
Reason R: Hydrogen is the lightest element.
In the light of the above statements, choose the correct answer from the options given below:

Match List - I with List - II.

Which one of the following compounds is non-aromatic?

What is the correct sequence of reagents used for converting nitrobenzene into m-dibromobenzene?

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is:

Given below are two statements:
Statement I: The value of the parameter "Biochemical Oxygen Demand (BOD)" is important for survival of aquatic life.
Statement II: The optimum value of BOD is 6.5 ppm.
In the light of the above statements, choose the most appropriate answer from the options given below:

Most suitable salt which can be used for efficient clotting of blood will be?