List of top Chemistry Questions

The ratio of mass percent of $C$ and $H$ of an organic compound $\left( C _{ X } H _{ Y } O _{ Z }\right)$ is $6: 1 .$ If one molecule of the above compound $\left( C _{ X } H _{ Y } O _{ Z }\right)$ contains half as much oxygen as required to burn one molecule of compound $C _{X} H_{Y}$ completely to $CO _{2}$ and $H _{2} O$. The empirical formula of compound $C _{ X } H _{ Y } O _{ Z }$ is
Two compounds I and II are eluted by column chromatography (adsorption of I > II). Which one of following is a correct statement ?
When $9.65\,A$ current was passed for $1.0\, hour$ into nitrobenzene in acidic medium, the amount of p-aminophenol produced is_____.
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
Hydrogen peroxide reacts with lead sulphide to produce lead sulphate. Identify the other product formed
Nylon 6 is prepared from
\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?
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
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}}$)
The number of resonance structures possible for anisole is
Producer gas is a mixture of
pH of a $0.1\, M$ monobasic acid is found to be $2$. Hence, its osmotic pressure at a given temperature $TK$ 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?
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
If osmotic pressure of 4% (w/v) solution of sucrose is same as 2% (w/v) solution of 'X' find molecular mass of X.
For $1$ molal aqueous solution of the following compounds, which one will show the highest freezing point ?
The trans-alkenes are formed by the reduction of alkynes with :
Thermoplastic can be reused because of?
What is the name of six membered cyclic structure of glucose?
Aniline is a resonance hybrid of five structures and where do you find the maximum electron density in those structures?
Hydrolysis of diazonium salt produces
In the reaction shown below, the major product formed is
Acetic anhydride
Which of the following amino acid is achiral?