JEE Main 2024 Feb 1 Shift 1 — Chemistry

According to the wave-particle duality of matter by de-Broglie, which of the following graph plot presents most appropriate relationship between wavelength of electron($\lambda$) and momentum of electron (p) ?

Arrange the bonds in order of increasing ionic character in the molecules. $\mathrm{LiF}$, $\mathrm{K_2O}$, $\mathrm{N_2}$, $\mathrm{SO_2}$ and $\mathrm{ClF_3}$ :

Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :

We have three aqueous solutions of $\mathrm{NaCl}$ labelled as 'A', 'B' and 'C' with concentration 0.1 M, 0.01 M and 0.001 M, respectively. The value of van 't Hoff factor(i) for these solutions will be in the order :

In case of isoelectronic species the size of $\mathrm{F^-}$, $\mathrm{Ne}$ and $\mathrm{Na^+}$ is affected by :

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

Assertion (A) : $\mathrm{PH_3}$ has lower boiling point than $\mathrm{NH_3}$.

Reason (R) : In liquid state $\mathrm{NH_3}$ molecules are associated through vander Waal's forces, but $\mathrm{PH_3}$ molecules are associated through hydrogen bonding.

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

In acidic medium, $\mathrm{K_2Cr_2O_7}$ shows oxidising action as represented in the half reaction :

$$\mathrm{Cr_2O_7^{2-} + XH^+ + Ye^{\ominus} \rightarrow 2A + ZH_2O}$$

X, Y, Z and A are respectively are :

Which of the following reactions are disproportionation reactions ?

(A) $\mathrm{Cu^+ \rightarrow Cu^{2+} + Cu}$

(B) $\mathrm{3MnO_4^{2-} + 4H^+ \longrightarrow 2MnO_4^- + MnO_2 + 2H_2O}$

(C) $\mathrm{2KMnO_4 \longrightarrow K_2MnO_4 + MnO_2 + O_2}$

(D) $\mathrm{2MnO_4^- + 3Mn^{2+} + 2H_2O \longrightarrow 5MnO_2 + 4H^+}$

Choose the correct answer from the options given below :

Given below are two statements :

Statement (I) : A solution of $\mathrm{[Ni(H_2O)_6]^{2+}}$ is green in colour.

Statement (II) : A solution of $\mathrm{[Ni(CN)_4]^{2-}}$ is colourless.

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

Which of the following complex is homoleptic ?

In Kjeldahl's method for estimation of nitrogen, $\mathrm{CuSO_4}$ acts as :

Given below are two statements :

Statement (I) : Aminobenzene and aniline are same organic compounds.

Statement (II) : Aminobenzene and aniline are different organic compounds.

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

Ionic reactions with organic compounds proceed through :

(A) homolytic bond cleavage

(B) heterolytic bond cleavage

(C) free radical formation

(D) primary free radical

(E) secondary free radical

Choose the correct answer from the options given below :

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

Assertion (A) : Haloalkanes react with KCN to form alkyl cyanides as a main product while with AgCN form isocyanide as the main product.

Reason (R) : KCN and AgCN both are highly ionic compounds.

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

Identify A and B in the following sequence of reaction

$$\mathrm{C_6H_5CH_3} \xrightarrow{\mathrm{Cl_2}/h\nu} \mathrm{A} \xrightarrow[\text{373 K}]{\mathrm{H_2O}} \mathrm{B}$$

toluene (benzene ring with CH$_3$) treated with Cl$_2$/h$\nu$ to give A, then H$_2$O at 373 K to give B

Match List - I with List - II.

List - I (Reactions)	List - II (Reagents)
(A) $\mathrm{CH_3(CH_2)_5\overset{\displaystyle O}{\underset{\phantom{O}}{\overset{\|}{C}}}\!-OC_2H_5 \longrightarrow CH_3(CH_2)_5CHO}$	(I) $\mathrm{CH_3MgBr,\ H_2O}$
(B) $\mathrm{C_6H_5COC_6H_5 \rightarrow C_6H_5CH_2C_6H_5}$	(II) $\mathrm{Zn(Hg)}$ and conc. $\mathrm{HCl}$
(C) $\mathrm{C_6H_5CHO \rightarrow C_6H_5CH(OH)CH_3}$	(III) $\mathrm{NaBH_4,\ H^+}$
(D) $\mathrm{CH_3COCH_2COOC_2H_5 \rightarrow CH_3\underset{\displaystyle H}{C}(OH)CH_2COOC_2H_5}$	(IV) DIBAL-H, $\mathrm{H_2O}$

Choose the correct answer from the options given below :

Given below are two statements :

Statement (I) : The $\mathrm{NH_2}$ group in Aniline is ortho and para directing and a powerful activating group.

Statement (II) : Aniline does not undergo Friedel-Craft's reaction (alkylation and acylation).

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

Which of the following compound will most easily be attacked by an electrophile ?

If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is :

Given below are two statements :

Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.

Statement (II) : In this titration phenolphthalein can be used as indicator.

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

Consider the following reaction :

$$\mathrm{3PbCl_2 + 2(NH_4)_3PO_4 \rightarrow Pb_3(PO_4)_2 + 6NH_4Cl}$$

If 72 mmol of $\mathrm{PbCl_2}$ is mixed with 50 mmol of $\mathrm{(NH_4)_3PO_4}$, then the amount of $\mathrm{Pb_3(PO_4)_2}$ formed is ________ mmol (nearest integer).

The number of molecules/ion/s having trigonal bipyramidal shape is ________.

$\mathrm{PF_5}$, $\mathrm{BrF_5}$, $\mathrm{PCl_5}$, $\mathrm{[PtCl_4]^{2-}}$, $\mathrm{BF_3}$, $\mathrm{Fe(CO)_5}$

$\mathrm{K_a}$ for $\mathrm{CH_3COOH}$ is $1.8 \times 10^{-5}$ and $\mathrm{K_b}$ for $\mathrm{NH_4OH}$ is $1.8 \times 10^{-5}$. The pH of ammonium acetate solution will be ________.

The lowest oxidation number of an atom in a compound $\mathrm{A_2B}$ is $-2$. The number of electrons in its valence shell is ________.

The potential for the given half cell at 298 K is $(-)$________ $\times 10^{-2}\,\mathrm{V}$.

$$\mathrm{2H^+_{(aq)} + 2e^- \longrightarrow H_2(g)}$$

$[\mathrm{H^+}] = 1\,\mathrm{M}$, $\mathrm{P_{H_2}} = 2$ atm

(Given : $2.303\mathrm{RT/F} = 0.06\ \mathrm{V}$, $\log 2 = 0.3$)

The ratio of $\frac{\mathrm{^{14}C}}{\mathrm{^{12}C}}$ in a piece of wood is $\frac{1}{8}$ part that of atmosphere. If half life of $\mathrm{^{14}C}$ is 5730 years, the age of wood sample is ________ years.

Among the following oxides of p-block elements, number of oxides having amphoteric nature is ________.

$\mathrm{Cl_2O_7}$, $\mathrm{CO}$, $\mathrm{PbO_2}$, $\mathrm{N_2O}$, $\mathrm{NO}$, $\mathrm{Al_2O_3}$, $\mathrm{SiO_2}$, $\mathrm{N_2O_5}$, $\mathrm{SnO_2}$

Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is ________.

$\mathrm{-\overset{\displaystyle O}{\overset{\|}{C}}-OCH_3}$ , $\mathrm{-\underset{\displaystyle H}{N}-\overset{\displaystyle O}{\overset{\|}{C}}-CH_3}$ , $\mathrm{-\underset{\displaystyle H}{N}-CH_3}$ , $\mathrm{-C{\equiv}N}$ , $\mathrm{-OCH_3}$

Number of optical isomers possible for 2-chlorobutane ________.

The number of white coloured salts, among the following is ________.

(a) $\mathrm{SrSO_4}$ (b) $\mathrm{Mg(NH_4)PO_4}$ (c) $\mathrm{BaCrO_4}$ (d) $\mathrm{Mn(OH)_2}$

(e) $\mathrm{PbSO_4}$ (f) $\mathrm{PbCrO_4}$ (g) $\mathrm{AgBr}$ (h) $\mathrm{PbI_2}$

(i) $\mathrm{CaC_2O_4}$ (j) $\mathrm{[Fe(OH)_2(CH_3COO)]}$