JEE Main 2024 Jan 27 Shift 1 — Chemistry

Choose the polar molecule from the following :

A solution of two miscible liquids showing negative deviation from Raoult's law will have :

Given below are two statements :

Statement (I) : Aqueous solution of ammonium carbonate is basic.

Statement (II) : Acidic/basic nature of salt solution of a salt of weak acid and weak base depends on $\mathrm{K_a}$ and $\mathrm{K_b}$ value of acid and the base forming it.

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

Given below are two statements :

Statement (I) : The $4f$ and $5f$ - series of elements are placed separately in the Periodic table to preserve the principle of classification.

Statement (II) : s-block elements can be found in pure form in nature.

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

Element not showing variable oxidation state is :

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

Assertion (A) : Melting point of Boron (2453 K) is unusually high in group 13 elements.

Reason (R) : Solid Boron has very strong crystalline lattice.

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

Which of the following electronic configuration would be associated with the highest magnetic moment ?

The electronic configuration for Neodymium is :

[Atomic Number for Neodymium 60]

Consider the following complex ions

$\mathrm{P = [FeF_6]^{3-}}$

$\mathrm{Q = [V(H_2O)_6]^{2+}}$

$\mathrm{R = [Fe(H_2O)_6]^{2+}}$

The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is :

IUPAC name of following compound (P) is :

cyclohexane ring bearing two methyl groups on the same carbon (gem-dimethyl) and an ethyl group on the carbon two positions away

Cyclohexene

cyclohexene ring structure

is ________ type of an organic compound.

Which of the following has highly acidic hydrogen ?

The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is :

Given below are two statements :

Statement (I) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol.

Statement (II) : Ethanol will give immediate turbidity with Lucas reagent.

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

The ascending order of acidity of $\mathrm{-OH}$ group in the following compounds is :

(A) $\mathrm{Bu{-}OH}$

(B)

4-nitrophenol, $\mathrm{O_2N{-}C_6H_4{-}OH}$ (para)

(C)

4-methoxyphenol, $\mathrm{MeO{-}C_6H_4{-}OH}$ (para)

(D)

phenol, $\mathrm{C_6H_5{-}OH}$

(E)

2,4-dinitrophenol, phenol with $\mathrm{NO_2}$ groups at ortho and para positions

Choose the correct answer from the options given below :

Highest enol content will be shown by :

Which of the following is strongest Bronsted base ?

Two nucleotides are joined together by a linkage known as :

Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. The product of lead formed is a :

NaCl reacts with conc. $\mathrm{H_2SO_4}$ and $\mathrm{K_2Cr_2O_7}$ to give reddish fumes (B), which react with NaOH to give yellow solution (C). (B) and (C) respectively are :

Mass of methane required to produce 22 g of $\mathrm{CO_2}$ after complete combustion is ________ g.

(Given Molar mass in $\mathrm{g\ mol^{-1}}$   C = 12.0   H = 1.0   O = 16.0)

The number of electrons present in all the completely filled subshells having $n = 4$ and $s = +\frac{1}{2}$ is ________.

(Where $n$ = principal quantum number and $s$ = spin quantum number)

Sum of bond order of CO and $\mathrm{NO^+}$ is ________.

If three moles of an ideal gas at 300 K expand isothermally from $30\ \mathrm{dm^3}$ to $45\ \mathrm{dm^3}$ against a constant opposing pressure of 80 kPa, then the amount of heat transferred is ________ J.

From the given list, the number of compounds with +4 oxidation state of Sulphur is ________.

$\mathrm{SO_3,\ H_2SO_3,\ SOCl_2,\ SF_4,\ BaSO_4,\ H_2S_2O_7}$

The mass of silver (Molar mass of Ag : $108\ \mathrm{g\,mol^{-1}}$) displaced by a quantity of electricity which displaces 5600 mL of $\mathrm{O_2}$ at S.T.P. will be ________ g.

Consider the following data for the given reaction

$$\mathrm{2\,HI_{(g)} \rightarrow H_{2(g)} + I_{2(g)}}$$

	1	2	3
$\mathrm{HI\ (mol\ L^{-1})}$	0.005	0.01	0.02
$\mathrm{Rate\ (mol\ L^{-1}s^{-1})}$	$7.5 \times 10^{-4}$	$3.0 \times 10^{-3}$	$1.2 \times 10^{-2}$

The order of the reaction is ________.

Among the following, total number of meta directing functional groups is ________. (Integer based)

$\mathrm{-OCH_3,\ -NO_2,\ -CN,\ -CH_3,\ -NHCOCH_3,\ -COR,\ -OH,\ -COOH,\ -Cl}$

Among the given organic compounds, the total number of aromatic compounds is ________.

(A)

two fused six-membered rings, each ring containing two C=C double bonds with sp3 ring-fusion carbons (4a,8a-dihydronaphthalene)

(B)

benzene ring connected through a $\mathrm{CH_2}$ group to a cyclohexene ring

(C)

benzene ring fused to a five-membered ring whose apex carbon bears a lone pair (carbanion-type centre)

(D)

two benzene rings fused to a central five-membered ring whose carbon bears a negative charge (fluorenyl anion)

3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for 'A' is ________.