List of top Chemistry Questions

If molar conductivity of \(Ca^{2+}\) and \(Cl^-\) ions are 119 and 71 Scm² mol^-1 respectivily, then the molar conductivity of \(CaCl_2\) at infinite dilution is

If 10 L of an ideal gas at a pressure of 5 atm expands isothermally and reversibly to a final volume of 100 L. the work done and heat absorbed in this process (in Lit-atm), respectively are

\Mien borax is heated dining borax bead test along with CoO (Cobalt Oxide) on a loop of platinum (Pt) wire, it swells up and produces a blue colored bead. Which of the following compounds is responsible for the blue color?

The volume of $O_2$ (in L) that can be produced at STP by heating 112 g of $ {KClO_3}$ is approximately (Molar mass of $ {KCIO_3 = 122.6 \, g \, mol^{-1}}$)

Calculate the normality of a solution obtained on mixing 100 ml of $\frac{M}{10} H_2 SO_4 , 50 \, ml$ of $\frac{N}{2} HNO_3$ and $25 \, ml $ of $\frac{N}{5} HCl$ solutions.

Hydrogen peroxide reacts with lead sulphide to produce lead sulphate. Identify the other product formed

Nylon 6 is prepared from

Producer gas is a mixture of

The number of resonance structures possible for anisole is

Arrange the following alcohols in increasing order of their reactivity towards the reaction with $HCl$. $\left( CH _{3}\right)_{2} CH - OH (1),\left( CH _{3}\right)_{3} C - OH (2),\left( C _{6} H _{5}\right)_{3} COH (3)$

In a set of reactions, ethylbenzene yielded a product D.

If the Planck?s constant $h = 6.6 \times 10^{-34} \, Js$, the de Broglie wavelength of a particle having momentum of $3.3 \times 10^{-24} \, kg \, ms^{-1}$ will be

Which of the following element do not form complex with EDTA?

$100\, mL \,O _{2}$ and $H _{2}$ kept at same temperature and pressure. What is true about their number of molecules

The rate constant of a reaction is $1.5 \times 10^{-3}$ at $25^{\circ} C$ and $2.1 \times 10^{-2}$ at $60^{\circ} C$. The activation energy is

For the reaction taking place at certain temperature ${NH_2 COONH_4 (s) <=> 2NH_3 (g) + CO_2 (g) }$, if equilibrium pressure is 3X bar then $ \Delta_G$ would be

Which of the following is the correct and increasing order of lone pair of electrons on the central atom?

Beryllium shows diagonal relationship with aluminium. Which of the following similarity is incorrect ?

The pH of $0.1\, M$ solution of the following salts increases in the order :

Consider the reactions (A) $H _{2} O _{2}+2 HI \longrightarrow I _{2}+2 H _{2} O$ (B) $HOCl + H _{2} O _{2} \longrightarrow H _{3} O ^{+}+ Cl ^{-}+ O _{2}$ Which of the following statements is correct about $H _{2} O _{2}$ with reference to these reactions? Hydrogen peroxide is ____

Following are colours shown by some alkaline earth metals in flame test. Which of the following are not correctly matched?

Amongst the elements with following electronic configurations, which one of them may have the highest ionization energy?

Chloroform, $CHCl _{3}$, boils at $61.7^{\circ} C$. If the $K_{b}$ for chloroform is $3.63^{\circ} C / molal$, what is the boiling point of a solution of $15.0\, kg$ of $CHCl _{3}$ and $0.616\, kg$ of acenaphthalene, $C _{12} H _{10}$ ?

How many $\sigma$ bonds and $\pi$ bonds are present in