List of top Chemistry Questions

The ground state energy of hydrogen atom is $-13.6\, eV$. What is the potential energy of the electron in this state?

If 13.6eV energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $ n=2 $ is:

The elevation in boiling point, when 13.44 g of freshly prepared CuCI$_2$ are added to one kilogram of water, is . [Some useful data, K$_b = 0.52 K kg mol^{-1}$, molecular weight of CuCl$_2$ =134.4 g]

The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively. Which of the following statements is not correct ?

The correct order of the thermal stability of hydrogen halides (H - X)is :

The co-ordination number and oxidation number of $X$ in the following compound $[X(SO_4)(NH_3)_5]Cl$ will be:

The chief impurity present in red bauxite is:

The charge on an electron was discovered by:

Degree of dissociation of $NH _{4} OH$ in water is $1.8 \times 10^{-5}$, then hydrolysis constant of $NH _{4} Cl$ is :

For $A \longrightarrow B, \Delta H=4\, Cal\, mol ^{-1}\,\Delta S=10\, Cal\, mol ^{-1}\, K ^{-1}$ reaction is spontaneous when temperature can be :

What amount of water is added in $40\, ml$ of $NaOH (0.1\, N )$ which is neutralized by $50\, ml$ of $HCl (0.2\, N )$ ?

Slope between $ PV $ and $ P $ at constant temperature is:

Mole fraction of a solute in benzene is $0.2$ then find molality of solute:

Unit of rate constant of zero order reaction is:

Which of the following is more acidic in nature?

The alcohol manufactured from water gas is

Schottky defect generally appears in:

Polymer formation from monomers starts by

Which has minimum solubility?

Frenkel and Schottky defects are:

Pasteurization is :

The enthalpy change $ (\Delta H) $ for the neutralisation of $M\,HCl $ by caustic potash in dilute solution at $298\, K$ is :

Which of the following gas is linear?

Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is :

Nucleic acid was first isolated from pus cells by