List of top Chemistry Questions

An element crystallises in a structure having a $fcc$ unit cell of an edge $200\,pm$. If $200\,g$ of this element contains $24 \times 10^{23}$ atoms then its density is
An electron is in one of the $3d$-orbitals. What are the possible values of $n$, $l$ and $m$ for this electron?
An electrolytic cell contains a solution of $Ag_2SO_4$ and have platinum electrodes. A current is passed until 1.6 gm of $O_2$ has been liberated at anode. The amount of silver deposited at cathode would be
An electric current is passed through silver voltameter connected to a water voltmeter. The cathode of the silver voltameter is 0.108 g moreat the end of the electrolysis. The volume ofoxygen evolved at STP is :
An arsenious sulphide sol carries a negative charge. The maximum precipitating power for this sol is possessed by
An aqueous solution of sodium carbonate is' alkaline because sodium carbonate is a salt of
An antibiotic contains nitro group attached to aromatic nucleus in its structure. It is
An amorphous solid $(X)$ burns in air to form a gas $(Y)$ which turns lime water milky. This gas decolourises aqueous solution of acidified $KMnO_4$. Gas $(Y)$ reacts with oxygen to give another gas $(Z)$ which is responsible for acid rain. $X$, $Y$ and $Z$ are
An alkyl halide, $RX$ reacts with $KCN$ to give propane nitrile. $RX$ is
An alcohol $(A)$ on dehydration gives $(B)$ which adds bromine molecule to give $(C). (C)$ on heating with sodamide gives $(D)$ which on hydration in the presence of $Hg^{++}/H_{2}SO_{4}$ gives $(E). E$ on reduction by lithium aluminium hydride gives $(A). (E)$ is also obtained on dry distillation of calcium salt of acetic acid. How many enolisable proton present in the product $(E)$?
An aldehyde on oxidation gives
An acidified solution of potassium permanganate oxidizes
Amphoteric oxides of Mn and Cr are
Amphoteric oxide among the following is -
Amongst the following, the strongest base in aqueous medium is _____________ .
Among the following, the dissociation constant is highest for :
Among the following polymers, the strongest molecular forces are present in
Among the following diatomic molecules, the shortest bond length is associated with
Among the following isostructural compounds, which one has highest lattice energy ?
Among the following derivatives of ethane, the one having the highest boiling point is
Among the following compounds which is both paramagnetic and coloured?
Among the elements with atomic numbers $9$, $12$, $16$ and $36$ which is highly electropositive?
Among 3d transition series the I.E
Among F,Cl,Br and I the lowest ionization potential will be of
Ammonium chloride when dissolved in water leads to a cooling sensation. The dissolution of ammonium chloride at constant temperature is accompanied by