NTA JEE Mains 29th Jan 2024 Shift 1 - Chemistry

The correct set of four quantum numbers for the valence electron of rubidium atom $$(Z = 37)$$ is:

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The first ionisation enthalpy decreases across a period.
Reason R: The increasing nuclear charge outweighs the shielding across the period.
In the light of the above statements, choose the most appropriate from the options given below:

Which of the following is not correct?

Chlorine undergoes disproportionation in alkaline medium as shown below :
$$aCl_2(g) + bOH^-(aq) \rightarrow cClO^-(aq) + dCl^-(aq) + eH_2O(l)$$
The values of $$a, b, c$$ and $$d$$ in a balanced redox reaction are respectively :

$$KMnO_4$$ decomposes on heating at $$513$$ K to form $$O_2$$ along with

Given below are two statements :
Statement I : The electronegativity of group 14 elements from Si to Pb gradually decreases.
Statement II : Group 14 contains non-metallic, metallic, as well as metalloid elements.
In the light of the above statements, choose the most appropriate from the options given below :

The interaction between $$\pi$$ bond and lone pair of electrons present on an adjacent atom is responsible for

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is:

Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with $$FeSO_4$$ in presence of concentrated $$H_2SO_4$$ indicates the presence of element/s

Identify product A and product B

The major product (P) in the following reaction is

The arenium ion which is not involved in the bromination of Aniline is

The final product A formed in the following multistep reaction sequence is:

Identify the incorrect pair from the following :

In chromyl chloride test for confirmation of $$Cl^-$$ ion, a yellow solution is obtained. Acidification of the solution and addition of amyl alcohol and $$10\% H_2O_2$$ turns organic layer blue indicating formation of chromium pentoxide. The oxidation state of chromium in that is

In alkaline medium, $$MnO_4^-$$ oxidises $$I^-$$ to

In which one of the following metal carbonyls, CO forms a bridge between metal atoms?

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom.
Reason R : Phenols react with halogen acids violently.
In the light of the above statements, choose the most appropriate from the options given below:

Type of amino acids obtained by hydrolysis of proteins is :

Match List I with List II

Choose the correct answer from the options given below:

Number of compounds with one lone pair of electrons on central atom amongst following is _______
$$O_3, H_2O, SF_4, ClF_3, NH_3, BrF_5, XeF_4$$

The number of species from the following which are paramagnetic and with bond order equal to one is _______
$$H_2, He_2^+, O_2^+, N_2^{2-}, O_2^{2-}, F_2, Ne_2^+, B_2$$

For the reaction $$N_2O_4(g) \rightleftharpoons 2NO_2(g)$$, $$K_p = 0.492$$ atm at $$300$$ K. $$K_c$$ for the reaction at same temperature is _______ $$\times 10^{-2}$$. (Given: $$R = 0.082$$ L atm mol$$^{-1}$$ K$$^{-1}$$)

Number of compounds among the following which contain sulphur as heteroatom is _______.
Furan, Thiophene, Pyridine, Pyrrole, Cysteine, Tyrosine

Consider the given reaction. Trans-2-butene $$\xrightarrow{(i) O_3}$$ $$\xrightarrow{(ii) Zn/H_2O}$$ (P)
The total number of oxygen atoms present per molecule of the product (P) is _______.

A solution of $$H_2SO_4$$ is $$31.4\%$$ $$H_2SO_4$$ by mass and has a density of $$1.25$$ g/mL. The molarity of the $$H_2SO_4$$ solution is M (nearest integer) [Given molar mass of $$H_2SO_4 = 98$$ g mol$$^{-1}$$]

The osmotic pressure of a dilute solution is $$7 \times 10^5$$ Pa at $$273$$ K. Osmotic pressure of the same solution at $$283$$ K is _______ $$\times 10^4$$ Nm$$^{-2}$$. (Nearest integer)

The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of $$0.015$$ A for $$15$$ minutes is _______ $$\times 10^{-4}$$ g. (Atomic mass of zinc $$= 65.4$$ amu)

For a reaction taking place in three steps at same temperature, overall rate constant $$K = \frac{K_1 K_2}{K_3}$$. If $$Ea_1, Ea_2$$ and $$Ea_3$$ are $$40, 50$$ and $$60$$ kJ/mol respectively, the overall $$Ea$$ is _______ kJ/mol.

From the compounds given below, number of compounds which give positive Fehling's test is _______
Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4-nitrobenzaldehyde, cyclohexane carbaldehyde.