List of top Chemistry Questions

Which one of the following is not a common component of photo-chemical smog ?

Which of the following is not a biodegradable polymer ?

Which of the following atoms should have the highest $1^{\text{st}]$ electron affinity?

The molality of solution containing $15.20\, g$ of urea, (molar mass = $60$) dissolved in $150 \,g$ of water is

In assigning $R-S$ configuration which among the following groups has highest priority ?

The amino acid which is basic in nature is

Aldehydes or ketones when treated with $\ce{C_6H_5 - NH - NH_2}$, the product formed is

Which among the following compounds does not act as a reducing agent ?

Solubility of which among the following solids in water changes slightly with temperature ?

Which among the following reactions is an example of pseudo first order reaction ?

The osmotic pressure of solution containing $34.2 \,g$ of cane sugar (molar mass = $342 \, g \, mol^{-1}$) in 1L of solution at $20^{\circ} C$ is (Given, $R = 0.082 \, L \, atm \, K^{-1} \, mol^{-1}$)

Identify the weakest oxidising agent among the following.

The colour and magnetic nature of manganate ion $(MnO^{2-}_4)$ is

What is the actual volume occupied by water molecules present in $20 \, cm^3$ of water ?

$XeF_6$ on partial hydrolysis with water produces a compound $'X'$. The same compound $'X'$ is formed when $XeF_6$ reacts with silica. The compound $'X'$ is :

How many faradays are required to reduce $1\, mol$ of $Cr_{2} O_{7}^{2-}$ to $Cr^{3+}$ in acid medium?

By passing electric current, \(NaClO_3\) is converted into \(NaClO_4\) according to the following equation \(Na ClO_3 + H_2 O \rightarrow NaClO_4 + H_2\) How many moles of \(NaClO_4\) will be formed when three Faradays of charge is passed through \(NaClO_3\) ?

Square planar complexes of the type $M_{ABXL}$ (where $A, B, X$ and $L$ are unidentate ligands) shows following set of isomers

Which of the following compounds will exhibit geometrical isomerism?

For a solution formed by mixing liquids $L$ and $M$, the vapour pressure of $L$ plotted against the mole fraction of $M$ in solution is shown in the following figure. Here $x _{ L }$ and $x _{ M }$ represent mole fractions of $L$ and $M$, respectively, in the solution. The correct statement $(s)$ applicable to this system is (are)

$A\, 6\%$ solution of sucrose $C_{22}H_{22} O_{11}$ is isotonic with $3\%$ solution of an unknown organic substance. The molecular weight of unknown organic substance will be:

The depression in freezing point of $0.1\, M$ aqueous solutions of $HCl$, $CuSO_4$ and $K_2SO_4$ are in the ratio

Azeotropic mixtures are formed only by non-ideal solutions and they may have boiling points either greater than both the components or lesser than both the components. The composition of the vapour phase is same as that of the liquid phase of an azeotropic mixture.

For a reaction $\frac{1}{2} A \to 2B$ rate of disappearance of $A$ is related to rate of appearance of $B$ by the expression

In a flask, the weight ratio of $CH _{4}( g )$ and $SO _{2}(g)$ at $298 \,K$ and 1 bar is $1: 2$. The ratio of the number of molecules of $SO _{2}(g)$ and $CH _{4}(g)$ is