List of top Chemistry Questions

An organic compound (X) dissolves in dilute NaOH but not in dilute \(NaHCO_3\) solution. X with \(Br_2/H_2O\) gives tribromo derivative. What is X?

The correct statement about an \(S_N1\) reaction is

Which of the following represents the correct structure of 3-Ethyl cyclohexane carbaldehyde?

The incorrect statement regarding \(C\) formed in the given sequence of reactions is: \[ CH_3CHO \xrightarrow{\text{(i) } CH_3MgBr} A \xrightarrow{H_2O} B \xrightarrow{PCC} \text{dil. NaOH} \rightarrow C \]

What is the product Y in the given reaction sequence? \[ CH_3COOH \xrightarrow{\text{(i) } NH_3 \text{ (ii) } \Delta} X \xrightarrow{Br_2/NaOH} Y \]

What are X and Y in the following reactions? \[ (CH_3)_3C-ONa + C_2H_5Br \rightarrow X \] \[ (CH_3)_3C-Br + C_2H_5ONa \rightarrow Y \]

Which of the following is not a condensation polymer?

The reaction of chlorine with hot and concentrated NaOH solution gave two chlorine containing products X, Y and \(H_2O\). Oxidation number of chlorine in X and Y is

Which of the following will give maximum number of isomers?

Among the four complex ions given, identify the pair of ions with same spin only magnetic moment value:

Which of the following is not correctly matched with the type of drug mentioned in brackets?

Which structure of protein represents its constitution?

Iodine on reaction with concentrated nitric acid gives three products X, Y and Z. The sum of oxidation numbers of the central atoms in X, Y and Z is

Identify the incorrect statement about colloidal solution.

A student builds a galvanic cell utilizing the reaction \[ Ni(s)+2Ag^+(aq)\rightarrow Ni^{2+}(aq)+2Ag(s) \] \[ E^\circ=1.05V \] At \(25^\circ C\), what could the student do for the cell to generate a potential greater than that of the initial standard cell?

The rate constant of a reaction is \[ 1.5\,mol^{-3/2}L^{3/2}s^{-1} \] What is the order of this reaction?

In leaching alumina, concentrated solution of \(X\) and in leaching gold, dilute solution of \(Y\) are used as leaching agents. \(X\) and \(Y\) respectively are

The bond angle in the most stable form of sulphur at room temperature is

The compound X can be separated from spent-lye in soap industry by using distillation under reduced pressure. What is X?

Identify the compound which has \(1^\circ\), \(2^\circ\), \(3^\circ\) and \(4^\circ\) carbons.

What is the product Y in the given reaction sequence?

Which of the following reagent(s) will convert n-propyl bromide to alkane with same number of carbon atoms? \[ \text{I. } Zn/H^+ \] \[ \text{II. } Na/\text{dry ether} \] \[ \text{III. } (i)\;alc.KOH \quad (ii)\;H_2/Pt \]

An element with molar mass \(M\,kg\,mol^{-1}\) forms a face centred cubic unit cell with edge length 405 pm. If the density is \(2.7\times10^{3}\,kg\,m^{-3}\). What is its molar mass \(M\)? \((N_A=6.0\times10^{23}\,mol^{-1})\)

The relative lowering of vapour pressure of an aqueous solution containing a non-volatile solute is 0.0125. The molality of the solution is

Given below are two statements: Statement-I: Solubility of alkaline earth metal hydroxides in water increases down the group. Statement-II: Solubility of alkaline earth metal sulphates in water increases down the group.