List of top Chemistry Questions

Which of the following molecules can be described as having sp hybridisation?

Which of the following best explains, why a hot air balloon rises?

Which of the following molecules represents the order of hybridisation sp² , sp² , sp, sp from left to right atoms ?

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

Nylon 6 is prepared from

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}}$)

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

The number of resonance structures possible for anisole is

Producer gas is a mixture of

Which of the following will have a meso-isomer also?

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

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.

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

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

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 ____

Which of the following is strongest nucleophile

If $V$ is the volume of one molecule of gas under given conditions, the van der Waal?s constant $b$ is

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?

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