List of top Chemistry Questions

The number of bridging $CO$ ligand (s) and $Co - Co$ bond (s) in $ {CO_2(CO)_8}$, respectively are :
Consider the given plots for a reaction obeying Arrhenius equation $(0^{\circ}C < T < 300^{\circ}C)$ : ($k$ and $E_a$ are rate constant and activation energy, respectively) Choose the correct option :
The metal used for making $X$-ray tube window is :
Which of the following is a condensation polymer?
Which is wrong with respect to our responsibility as a human being to protect our environment ?
The volume occupied by 1.8 g of water vapour at 374 °C and 1 bar pressure will be :- [Use R = 0.083 bar L $K^{-1}mol^{-1}$]
In the Bayer�s process, the leaching of alumina is done by using
The correct statement regarding the given Ellingham diagram is:
Poly-$\beta$-hydroxybutyrate-co-$\beta$ hydroxyvalerate (PHBV) is a copolymer of___.
When neutral or faintly alkaline KMnO4 is treated with potassium iodide, iodide ion is converted into 'X'. 'X' is -
What is the atomicity of aluminium phosphate?
The reaction in which $2$ molecules of chlorobenzene reacts with metallic sodium in presence of dry ether forming diphenyl is an example of,
Conjugate base for Bronsted acids $H_2O$ and $HF$ are:
Orbital having 3 angular nodes and 3 total nodes is :-
The rate of decrease of kinetic energy is 9.6j/s. Find magnitude of force acting on particle when it�s speed in 3 m/s?
Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure. AB $\rightarrow$ Isothermal expansion AC $\rightarrow$ Adiabatic expansion Which of the following options is not correct ?
The mole fraction of a solvent in aqueous solution of a solute is 0.8. The molality (in mol $kg^{-1}$) of the aqueous solution is
Element 'B' forms ccp structure and 'A' occupies half of the octahedral voids, while oxygen atoms occupy all the tetrahedral voids. The structure of bimetallic oxide is :
The upper stratosphere consisting of the ozone layer protects us from the sun's radiation that falls in the wavelength region of :
A compound of formula $A_2B_3$ has the hcp lattice. Which atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms :
At $100^{\circ} \,C$, copper $(Cu)$ has $FCC$ unit cell structure with cell edge length of $x\, ?$ What is the approximate density of $Cu$ (in $g\, cm^{-3})$ at this temperature ? [Atomic Mass of $Cu = 63.55\,u]$
The mixture that forms maximum boiling azeotrope is :
The method used to remove temporary hardness of water is:
The polymer that is used as a substitute for wool in making commercial fibres is :
The biodegradable polymer is