NTA JEE Main 26th June 2022 Shift 1

A commercially sold conc. HCl is $$35\%$$ HCl by mass. If the density of this commercial acid is $$1.46$$ g/mL, the molarity of this solution is : (Atomic mass : Cl $$= 35.5$$ amu, H $$= 1$$ amu)

If the radius of the $$3^{rd}$$ Bohr's orbit of hydrogen atom is $$r_3$$ and the radius of $$4^{th}$$ Bohr's orbit is $$r_4$$. Then

Consider the ions/molecule $$O_2^+, O_2, O_2^-, O_2^{2-}$$. For increasing bond order the correct option is

An evacuated glass vessel weighs $$40.0$$ g when empty, $$135.0$$ g when filled with a liquid of density $$0.95$$ g mL$$^{-1}$$ and $$40.5$$ g when filled with an ideal gas at $$0.82$$ atm at $$250$$ K. The molar mass of the gas in g mol$$^{-1}$$ is : (Given : $$R = 0.082$$ L atm K$$^{-1}$$ mol$$^{-1}$$)

The correct order of melting point is

Given below are two statements :
Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.
Statement II : If both nitrogen and sulphur are present in an organic compound, then the excess of sodium used in sodium fusion will decompose the sodium thiocyanate formed to give NaCN and $$Na_2S$$.
In the light of the above statements, choose the most appropriate answer from the options given below

Which will have the highest enol content?

The $$\left(\frac{\partial E}{\partial T}\right)_P$$ of different types of half cells are as follows :
A: $$1 \times 10^{-4}$$, B: $$2 \times 10^{-4}$$, C: $$0.1 \times 10^{-4}$$, D: $$0.2 \times 10^{-4}$$
(Where E is the electromotive force). Which of the above half cells would be preferred to be used as reference electrode

Given below are two statements :
Statement I : According to the Ellingham diagram, any metal oxide with higher $$\Delta G°$$ is more stable than the one with lower $$\Delta G°$$.
Statement II : The metal involved in the formation of oxide placed lower in the Ellingham diagram can reduce the oxide of a metal placed higher in the diagram.
In the light of the above statements, choose the most appropriate answer from the options given below

Consider the following reaction :
$$2HSO_4^-(aq) \xrightarrow[(2) Hydrolysis]{(1) Electrolysis \atop } 2HSO_4^- + 2H^+ + A$$
The dihedral angle in product $$A$$ in its solid phase at $$110$$ K is