NTA JEE Mains 30th Jan 2024 Shift 1 - Chemistry

Given below are two statements:
Statement-I: The orbitals having same energy are called as degenerate orbitals.
Statement-II: In hydrogen atom, $$3p$$ and $$3d$$ orbitals are not degenerate orbitals.
In the light of the above statements, choose the most appropriate answer from the options given

Given below are the two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A): There is a considerable increase in covalent radius from $$N$$ to $$P$$. However from $$As$$ to $$Bi$$ only a small increase in covalent radius is observed.
Reason (R): covalent and ionic radii in a particular oxidation state increases down the group.
In the light of the above statement, choose the most appropriate answer from the options given below:

Match List - I with List-II

Structure of $$4-\text{Methylpent}-2-\text{enal}$$ is:

Example of vinylic halide is

Given below are two statements one is labeled as Assertion (A) and the other is labeled as Reason (R).
Assertion (A): $$CH_2=CH-CH_2-Cl$$ is an example of allyl halide
Reason (R): Allyl halides are the compounds in which the halogen atom is attached to $$sp^2$$ hybridised carbon atom.
In the light of the two above statements, choose the most appropriate answer from the options given below:

Which of the following molecule/species is most stable?

Compound $$A$$ formed in the following reaction reacts with $$B$$ gives the product $$C$$. Find out $$A$$ and $$B$$.

In the given reactions identify the reagent $$A$$ and reagent $$B$$

What happens to freezing point of benzene when small quantity of naphthalene is added to benzene?

Diamagnetic Lanthanoid ions are:

Match List-I with List-II

Choose the correct Statements from the following:
(A) Ethane-1,2-diamine is a chelating ligand.
(B) Metallic aluminium is produced by electrolysis of aluminium oxide in presence of cryolite.
(C) Cyanide ion is used as ligand for leaching of silver.
(D) Phosphine acts as a ligand in Wilkinson catalyst.
(E) The stability constants of $$Ca^{2+}$$ and $$Mg^{2+}$$ are similar with EDTA complexes.

Aluminium chloride in acidified aqueous solution forms an ion having geometry

This reduction reaction is known as:

Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B)

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

Given below are two statements:
Statement-I: The gas liberated on warming a salt with dil $$H_2SO_4$$, turns a piece of paper dipped in lead acetate into black, it is a confirmatory test for sulphide ion.
Statement-II: In statement-I the colour of paper turns black because of formation of lead sulphite.
In the light of the above statements, choose the most appropriate answer from the options given below:

The Lassaigne's extract is boiled with dil $$HNO_3$$ before testing for halogens because,

Sugar which does not give reddish brown precipitate with Fehling's reagent is:

$$0.05 \text{ cm}$$ thick coating of silver is deposited on a plate of area $$0.05 \text{ m}^2$$. The number of silver atoms deposited on plate are _______ $$\times 10^{23}$$. (At mass $$Ag = 108$$, $$d = 7.9 \text{ g cm}^{-3}$$) Round off to the nearest integer.

If IUPAC name of an element is "Unununnium" then the element belongs to $$n$$th group of periodic table. The value of $$n$$ is _______.

The total number of molecular orbitals formed from $$2s$$ and $$2p$$ atomic orbitals of a diatomic molecule is _______.

An ideal gas undergoes a cyclic transformation starting from the point $$A$$ and coming back to the same point by tracing the path $$A \rightarrow B \rightarrow C \rightarrow A$$ as shown in the diagram. The total work done in the process is _____ J.

The pH at which $$Mg(OH)_2 [K_{sp} = 1 \times 10^{-11}]$$ begins to precipitate from a solution containing $$0.10 \text{ M } Mg^{2+}$$ ions is ______.

$$2MnO_4^- + bI^- + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^-$$
If the above equation is balanced with integer coefficients, the value of $$z$$ is ________.

On a thin layer chromatographic plate, an organic compound moved by $$3.5 \text{ cm}$$, while the solvent moved by $$5 \text{ cm}$$. The retardation factor of the organic compound is ____________ $$\times 10^{-1}$$.

The mass of sodium acetate $$(CH_3COONa)$$ required to prepare $$250 \text{ mL}$$ of $$0.35 \text{ M}$$ aqueous solution is _____ g. (Molar mass of $$CH_3COONa$$ is $$82.02 \text{ g mol}^{-1}$$) Round off to the nearest integer.

The rate of first order reaction is $$0.04 \text{ mol L}^{-1} \text{s}^{-1}$$ at $$10$$ minutes and $$0.03 \text{ mol L}^{-1} \text{s}^{-1}$$ at $$20$$ minutes after initiation. Half life of the reaction is ______ minutes. (Given $$\log 2 = 0.3010$$, $$\log 3 = 0.4771$$)
Round off your answer to the nearest integer.

The compound formed by the reaction of ethanal with semicarbazide contains _______ number of nitrogen atoms.