Chemistry Previous Year Questions 2024 (2024–2024)

240 Chemistry previous-year questions spanning 2024–2024.

Chemistry 2024 · Biomolecules

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

Chemistry 2024 · Haloalkanes and Haloarenes

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 statement, choose the most appropriate answer from the options given below:

Chemistry 2024 · The d-and f-Block Elements

In acidic medium, $K_2Cr_2O_7$ shows oxidising action as represented in the half reaction $$Cr_2O_7^{2-} + XH^+ + Ye^- \rightarrow 2A + ZH_2O$$ X, Y, Z and A are respectively are:

Chemistry 2024 · Structure of Atom

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 ($p$)?

Chemistry 2024 · Aldehydes, Ketones and Carboxylic Acids

Identify A and B in the following sequence of reaction {{IMG1}}

Chemistry 2024 · Alcohols, Phenols and Ethers

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

Chemistry 2024 · Organic Chemistry Some Basic Principles and Techniques

In Kjeldahl's method for estimation of nitrogen, $CuSO_4$ acts as:

Chemistry 2024 · Aldehydes, Ketones and Carboxylic Acids

Match List - I with List - II. <div style="overflow-x: auto; margin: 1rem 0;"><table style="width: 100%; border-collapse: collapse; text-align: left; font-size: 14px;"><thead><tr><th style="border: 1px solid #888; padding: 8px;">List - I (Reactions)</th><th style="border: 1px solid #888; padding: 8px;">List - II (Reagents)</th></tr></thead><tbody><tr><td style="border: 1px solid #888; padding: 8px;">(A) $CH_3(CH_2)_5-CO-OC_2H_5 \rightarrow CH_3(CH_2)_5CHO$</td><td style="border: 1px solid #888; padding: 8px;">(I) $CH_3MgBr, H_2O$</td></tr><tr><td style="border: 1px solid #888; padding: 8px;">

Chemistry 2024 · Haloalkanes and Haloarenes

Number of optical isomers possible for 2-chlorobutane

Chemistry 2024 · Organic Chemistry Some Basic Principles and Techniques

Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is {{IMG1}}

Chemistry 2024 · Redox Reactions

Which of the following reactions are disproportionation reactions? (A) $Cu^+ \rightarrow Cu^{2+} + Cu$ (B) $3MnO_4^{2-} + 4H^+ \rightarrow 2MnO_4^- + MnO_2 + 2H_2O$ (C) $2KMnO_4 \rightarrow K_2MnO_4 + MnO_2 + O_2$ (D) $2MnO_4^- + 3Mn^{2+} + 2H_2O \rightarrow 5MnO_2 + 4H^+$ Choose the correct answer from the options given below:

Chemistry 2024 · Classification of Elements and Periodicity in Properties

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

Chemistry 2024 · Coordination Compounds

Given below are two statements: Statement (I): A solution of $[Ni(H_2O)_6]^{2+}$ is green in colour. Statement (II): A solution of $[Ni(CN)_4]^{2-}$ is colourless. In the light of the above statements, choose the most appropriate answer from the options given below:

Chemistry 2024 · The p-Block Elements

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $PH_3$ has lower boiling point than $NH_3$. Reason (R): In liquid state $NH_3$ molecules are associated through vander waal's forces, but $PH_3$ molecules are associated through hydrogen bonding. In the light of the above statements, choose the most appropriate answer from the options given below:

Chemistry 2024 · Amines

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:

Chemistry 2024 · Coordination Compounds

Which of the following complex is homoleptic?

Chemistry 2024 · Organic Chemistry Some Basic Principles and Techniques

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:

Chemistry 2024 · Chemical Bonding and Molecular Structure

Arrange the bonds in order of increasing ionic character in the molecules. $LiF$, $K_2O$, $N_2$, $SO_2$ and $ClF_3$.

Chemistry 2024 · Solutions

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

Chemistry 2024 · Some Basic Concepts of Chemistry

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:
Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)

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