List of top Chemistry Questions

For hydrogen - oxygen fuel cell at one $atm$ and $298\, K$ $H_2(g)+\frac {1}{2} O_2(g) \to H_2O_{(l)} ; \Delta G^\circ=-240\, kJ$ $E^\circ$ for the cell is approximately, (Given $F \,= \,96,500 \,C$)
For an ideal binary liquid mixture
Calculate the energy in joule corresponding to light of wavelength 45 nm (Planck's constant, $h=6.63\times10^{-34}$ Js; speed of light, $c=3\times 10^{8}$.
What kinds of bonds are present in ethene molecule?
In Freundlich Adsorption isotherm, the value of $1/n$ is :
Which acid is present in vinegar?
Lithium shows diagonal relationship with
Addition of oxygen to an element or a compound is termed as
Why $d$-block element form complexes?
Among the following molecule which has the zero dipole moment?
What are lanthanides and actinides?
The entropy of vaporization of a liquid is $58 \, JK^{-1} \,mol^{-1}$. If $100\, g$ of its vapour condenses at its boiling point of $123^{\circ}C$, the value of entropy change for the process is (Molar mass of the liquid = $58 \,g \,mol^{-1})$
Green chemistry deals with
According to MO theory,
The sugar moiety present in $RNA$ molecule is
Novlac, the linear polymer used in paints is
Wood spirit is known as
The smallest quantity of energy that can be emitted or absorbed in the form of electromagnetic radiation is known as
How much is the $pH$ of human blood?
What is the unit of zero order reaction?
How many octahedral void(s) are present per atom in a cubic close - packed structure?
For the reaction:
\(X_2O4(l) → 2XO_2(g)\)
△U = 2.1 k cal, △S = 20 cal K–l at 300 K.
Hence △G is
Using the Gibbs energy change, \(△G° = + 63.3\  kJ\), for the following reaction,
\(Ag_2CO_3 (g) ⇋ 2Ag+ (aq) + CO_3^{2–} (aq)\)
the \(K_{sp}\) of \(Ag_2CO_3 \)(s) in water at \(25°C\) is :
\((R = 8.314\ J K^{–1} mol^{–1})\)
Which of the following will not be soluble in sodiumhydrogen carbonate?
In the following reaction, the product (A) is :
In the following reaction, the product (A) is