NEET 2022 Chemistry Questions

Statement I: The acidic strength of monosubstituted nitrophenol is higher than phenol because of the electron-withdrawing nitro group. Statement II: o-nitrophenol, m-nitrophenol and p-nitrophenol will have the same acidic strength as they have one nitro group attached to the phenolic ring. Choose the most appropriate answer.

The Kjeldahl's method for the estimation of nitrogen can be used to estimate the amount of nitrogen in which one of the following compounds?

The incorrect statement regarding chirality is:

The correct IUPAC name of the following compound is: \ce{CH3-CH(Cl)-CH(CH3)-CH(OH)-CH2-CH2-Br}

The correct IUPAC name of the following compound is:

Choose the correct statement:

Which amongst the following is an incorrect statement?

Identify the incorrect statement related to \ce{PCl5} from the following:

Amongst the following, which one will have maximum 'lone pair–lone pair' electron repulsion?

Identify the incorrect statement from the following:

Given below are half-cell reactions: \ce{MnO4^- + 8H^+ + 5e^- -> Mn^2+ + 4H2O}, $E^\circ_{(\ce{MnO4^-}/\ce{Mn^2+})} = -1.510$ V; \ce{1/2 O2 + 2H^+ + 2e^- -> H2O}, $E^\circ_{(\ce{O2}/\ce{H2O})} = +1.223$ V. Will the permanganate ion \ce{MnO4^-} liberate \ce{O2} from water in the presence of an acid?

In the neutral or faintly alkaline medium, \ce{KMnO4} oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from:

Which compound amongst the following is not an aromatic compound?

Compound X on reaction with \ce{O3} followed by \ce{Zn/H2O} gives formaldehyde and 2-methylpropanal as products. The compound X is:

The correct IUPAC name of the following compound is:

The IUPAC name of an element with atomic number $119$ is:

Identify the incorrect statement from the following:

What mass of 95\% pure \ce{CaCO3} is required to neutralise 50 mL of 0.5 M \ce{HCl} according to the reaction below? (answer to second decimal place) \ce{CaCO3(s) + 2HCl(aq) -> CaCl2(aq) + CO2(g) + 2H2O(l)}

In a one molal solution that contains 0.5 mole of a solute, there is

The IUPAC name of an element with atomic number 119 is:

If the radius of the second Bohr orbit of the \ce{He+} ion is $105.8$ pm, what is the radius of the third Bohr orbit of the \ce{Li^2+} ion?

Which of the following $p$–$V$ curves represents the maximum work done?

In the reaction \ce{RMgX + CO2 ->[\text{dry ether}] Y ->[H3O+] RCOOH}, the intermediate Y is:

Which of the following sequence of reagents is suitable to synthesize chlorobenzene from the starting material shown?

The incorrect statement regarding chirality is:

The correct IUPAC name of the compound shown (a six-carbon chain bearing \ce{Br} at C1, \ce{OH} at C3, a \ce{CH3} branch at C4, and \ce{Cl} at C5) is:

Statement I: The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association due to dipole-dipole interactions. Statement II: The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding. In the light of the above statements, choose the most appropriate answer:

Match List-I with List-II. List-I (Products formed): (a) Cyanohydrin (b) Acetal (c) Schiff's base (d) Oxime List-II (Reaction of carbonyl compound with): (i) \ce{NH2OH} (ii) \ce{RNH2} (iii) alcohol (iv) \ce{HCN} Choose the correct answer from the options given below:

Which one of the following is \textbf{not} formed when acetone (\ce{CH3COCH3}) reacts with 2-pentanone (\ce{CH3COCH2CH2CH3}) in the presence of dilute \ce{NaOH} followed by heating?

Gadolinium has a low value of third ionisation enthalpy because of

Given below are half cell reactions: \ce{MnO4^- + 8H+ + 5e^- -> Mn^2+ + 4H2O}, $E^\circ_{(\ce{MnO4^-}/\ce{Mn^2+})} = +1.510$ V \ce{1/2 O2 + 2H+ + 2e^- -> H2O}, $E^\circ_{(\ce{O2}/\ce{H2O})} = +1.223$ V Will the permanganate ion, \ce{MnO4^-}, liberate \ce{O2} from water in the presence of an acid?

In the neutral or faintly alkaline medium, \ce{KMnO4} oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from

Given below are the half-cell reactions: \ce{MnO4^- + 8H+ + 5e- -> Mn^2+ + 4H2O}, $E^\circ_{\ce{MnO4^-/Mn^2+}} = -1.510\ \text{V}$ \ce{1/2 O2 + 2H+ + 2e- -> H2O}, $E^\circ_{\ce{O2/H2O}} = +1.223\ \text{V}$ Will the permanganate ion, \ce{MnO4^-}, liberate \ce{O2} from water in the presence of an acid?

At 298 K, the standard electrode potentials of \ce{Cu^2+/Cu}, \ce{Zn^2+/Zn}, \ce{Fe^2+/Fe} and \ce{Ag+/Ag} are $0.34\ \text{V}$, $-0.76\ \text{V}$, $-0.44\ \text{V}$ and $0.80\ \text{V}$, respectively. On the basis of standard electrode potential, predict which of the following reactions cannot occur?

Find the emf of the cell reaction \ce{Ni(s) + 2Ag+(0.001 M) -> Ni^2+(0.001 M) + 2Ag(s)} (Given $E^\circ_{cell} = 1.05\ \text{V}$, $\frac{2.303RT}{F} = 0.059$ at $298\ \text{K}$)

Statement I: The acidic strength of monosubstituted nitrophenol is higher than phenol because of the electron withdrawing nitro group. Statement II: o-nitrophenol, m-nitrophenol and p-nitrophenol will have the same acidic strength as they have one nitro group attached to the phenolic ring. Choose the most appropriate answer from the options given below:

Given below are two statements: Statement I: In the Lucas test, primary, secondary and tertiary alcohols are distinguished on the basis of their reactivity with conc. \ce{HCl} + \ce{ZnCl2}, known as Lucas reagent. Statement II: Primary alcohols are most reactive and immediately produce turbidity at room temperature on reaction with Lucas reagent. In the light of the above statements, choose the most appropriate answer from the options given below:

The IUPAC name of the complex \ce{[Ag(H2O)2][Ag(CN)2]} is:

The order of energy absorbed which is responsible for the colour of complexes: (A) $\ce{[Ni(H2O)2(en)2]^2+}$ (B) $\ce{[Ni(H2O)4(en)]^2+}$ (C) $\ce{[Ni(en)3]^2+}$

The given graph (drawn at constant temperature $T$) is a representation of the kinetics of a reaction. The plot of $y$ versus $x$ is a horizontal straight line parallel to the $x$-axis, i.e. $y$ is constant and independent of $x$. The $y$ and $x$ axes for zero order and first order reactions, respectively, are:

For a first order reaction \ce{A -> Products}, initial concentration of \ce{A} is $0.1\ \text{M}$, which becomes $0.001\ \text{M}$ after 5 minutes. Rate constant for the reaction in $\text{min}^{-1}$ is:

The incorrect statement regarding enzymes is:

In a one molal solution that contains 0.5 mole of a solute, there is:

Statement I: Primary aliphatic amines react with \ce{HNO2} to give unstable diazonium salts. Statement II: Primary aromatic amines react with \ce{HNO2} to form diazonium salts which are stable even above 300 K. Choose the most appropriate answer from the options given below: