List of top Chemistry Questions

For the reaction $H _{2}( g )+ Br _{2}( g ) \rightarrow 2 HBr ( g )$, the experiment data suggested that $r = k \left[ H _{2}\right]\left[ Br _{2}\right]^{1 / 2} .$ The molecularity and order of the reaction are respectively:

For the reaction $CO ( g )+\frac{1}{2} O _{2}( g ) \rightarrow CO _{2}( g )$ Which one of the statement is correct at constant $T$ and $P$ ?

The electronegativities of $C, N, Si$ and $P$ are in the order of

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

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

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

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 ?

Identify the weakest oxidising agent among the following.

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, $R = 0.082 \, L \, atm \, K^{-1} \, mol^{-1}$)

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