List of top Chemistry Questions

Given below are two statements:
Statement I: Fructose does not contain an aldehydic group but still reduces Tollen’s reagent.
Statement II: In the presence of base, fructose undergoes rearrangement to give glucose.
In the light of the above statements, choose the correct answer from the options given below.

Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is suitable for this? Given: Rydberg constant \( R_H = 10^5 \, \text{cm}^{-1} \), \( h = 6.6 \times 10^{-34} \, \text{J s} \), and \( c = 3 \times 10^8 \, \text{m/s} \)

Given below are two statements: Statement (I): In the case of formaldehyde, \( K \) is about 2280, due to small substituents, hydration is faster.
\includegraphics[]{54 i.PNG} Statement (II): In the case of trichloroacetaldehyde, \( K \) is about 2000 due to the -I effect of Cl. \includegraphics[]{54 ii.PNG} In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement (I): \textit{Nitrogen, sulphur, halogen, and phosphorus present in an organic compound are detected by Lassaigne's Test.}
Statement (II): \textit{The elements present in the compound are converted from covalent form into ionic form by fusing the compound with Magnesium in Lassaigne's test.} In the light of the above statements, choose the correct answer from the options given below:

Match List - I with List - II. List - I (Partial Derivatives) \quad List - II (Thermodynamic Quantity)

Consider the given figure and choose the correct option: \includegraphics[width=1\linewidth]{322.png}

Consider the following cases of standard enthalpy of reaction (\( \Delta H_f^\circ \) in kJ mol\(^{-1}\)): \[ \text{C}_2\text{H}_6(g) + 7 \text{O}_2(g) \rightarrow 2 \text{CO}_2(g) + 3 \text{H}_2\text{O}(l) \quad \Delta H_1^\circ = -1550 \] \[ \text{C(graphite)} + \text{O}_2(g) \rightarrow \text{CO}_2(g) \quad \Delta H_2^\circ = -393.5 \] \[ \text{H}_2(g) + \frac{1}{2} \text{O}_2(g) \rightarrow \text{H}_2\text{O}(g) \quad \Delta H_3^\circ = -286 \] The magnitude of \( \Delta H_f^\circ \) of \( \text{C}_2\text{H}_6(g) \) is ____ kJ mol\(^{-1}\) (Nearest integer).

\includegraphics[width=1\linewidth]{brc.png}

The most stable carbocation from the following is: \includegraphics[width=1\linewidth]{3333.png}

Given below are two statements: Statement (I): \textit{A spectral line will be observed for a 2p\(_x\) \(\rightarrow\) 2p\(_y\) transition.}
Statement (II): \textit{2p\(_x\) and 2p\(_y\) are degenerate orbitals.} In the light of the above statements, choose the correct answer from the options given below:

Match the Compounds (List - I) with the appropriate Catalyst/Reagents (List - II) for their reduction into corresponding amines. \includegraphics[width=1\linewidth]{b.png}

The molar solubility(s) of zirconium phosphate with molecular formula \( \text{Zr}^{4+} \text{PO}_4^{3-} \) is given by relation: \includegraphics[width=1\linewidth]{333.png}