List of top Chemistry Questions

An organic compound \(P\) of molecular formula \( \mathrm{C_6H_{12}O_3} \) gives positive iodoform test but negative Tollens’ test. When \(P\) is treated with dilute acid, it produces \(Q\). \(Q\) gives positive Tollens’ test and also iodoform test. Identify compound \(P\).

An organic compound (P) on treatment with aqueous ammonia under hot condition forms compound (Q) which on heating with \( \mathrm{Br_2} \) and KOH forms compound (R) having molecular formula \( \mathrm{C_6H_7N} \). Name P, Q and R respectively are :

The incorrect statement from the following with respect to carbohydrates is :

{Which statements are True? A. In Hoffmann bromamide degradation, 4 moles of NaOH and 2 moles of \( \mathrm{Br_2} \) are consumed per mole of an amide. B. Hoffmann bromamide reaction is not given by alkyl amides. C. Primary amines can be synthesized by Hoffmann bromamide degradation. D. Secondary amide on reaction with \( \mathrm{Br_2} \) and NaOH will give secondary amine. E. The by-products of Hoffmann degradation are \( \mathrm{Na_2CO_3} \), \( \mathrm{NaBr} \) and \( \mathrm{H_2O} \). Choose the correct answer from the options given below:}

The correct increasing order of basic strength of the following amines/compounds is:
(I) \(C_6H_5NH_2\) (Aniline)
(II) \(NH_3\) (Ammonia)
(III) \(C_6H_5CH_2NH_2\) (Benzylamine)
(IV) \(C_2H_5NH_2\) (Ethylamine)
(V) \((C_2H_5)_2NH\) (Diethylamine)

During an electrochemistry lab session, a student uses the Nernst Equation to calculate the cell potential (\( E_{\text{cell}} \)) of a galvanic system at a non-standard temperature. Which parameter option accurately defines the scaling behavior of the cell potential relative to changes in the reaction quotient (\( Q \))?

Identify which of the following heterocyclic nitrogenous bases is found exclusively within the macromolecular structure of RNA, and is completely absent in standard double-stranded DNA structures.

The steady, progressive decrease in the atomic and ionic radii of transition metals along the lanthanide series (Lanthanide Contraction) is primarily caused by:

What is the correct official unit measurement scale used to represent Molar Conductivity (\( \Lambda_m \)) profiles within electrolytic systems?

Which of the following statement options accurately describes the structural carbohydrate linkages present inside a standard molecule of Sucrose?

According to IUPAC coordination nomenclature rules, what is the correct official name for the coordination compound represented by \( [\text{Co}(\text{NH}_3)_5(\text{Cl})]\text{Cl_2 \)?}

An organic amine compound 'X' reacts smoothly with Hinsberg's reagent (Benzenesulfonyl chloride) to form a solid precipitate. This precipitate remains completely insoluble when treated with an aqueous sodium hydroxide (\( \text{NaOH} \)) solution. Classify the amine 'X'.

Determine the spin-only magnetic moment value for a central divalent manganese gaseous ion (\( \text{Mn}^{2+} \)) based on its d-orbital electron distribution. (Atomic Number of \( \text{Mn} = 25 \))

Which of the following carbonyl compounds will undergo a self-oxidation and self-reduction reaction (Cannizzaro Reaction) when treated with a concentrated solution of a strong base (\( \text{NaOH} \))?

A first-order reaction has a specific rate constant (\( k \)) equal to \( 2.303 \times 10^{-3} \text{ s}^{-1} \). Calculate the exact time required for the initial concentration of the reactant to be reduced to exactly \( \frac{1}{10} \)th of its original value.

Which of the following biomolecules acts as the genetic material in most organisms?

The half-life of a first order reaction is 1386 s. The rate constant \(k\) is:

Which of the following compounds can show metamerism?

The compound which is most basic in gaseous phase is:

Which of the following compounds gives a positive Hinsberg test and forms a soluble sulphonamide?

Among the following, the compound having the lowest value of \(pK_a\) is:

Which of the following compounds has the highest boiling point?

Lucas reagent gives immediate turbidity with:

Among the following amines, the strongest base in aqueous solution is: \[ \text{NH}_3,\; \text{CH}_3\text{NH}_2,\; (\text{CH}_3)_2\text{NH},\; (\text{CH}_3)_3\text{N} \]

Arrange the following compounds in increasing order of acidic strength: \[ \text{Phenol, Water, Propan-1-ol, Propan-2-ol} \]