List of top Chemistry Questions

The major binding force of diamond, silicon and quartz is
The main factor responsible for acidic nature of $BF_3$ is
The main element of smog is
The longest wavelength doublet absorption transition is observed at $589$ and $589.6\,nm$. Energy difference between two excited states is
The liquid drop model of nucleus was proposed by
The limiting radius ratio for tetrahedral shape is:
The lightest gas which is non-inflammable is
The last element of the third transition series is
The largest bond angle is in
The Kolbe's electrolysis proceeds via
The kinetic theory of gases gives the formula $PV = \frac{1}{3} Nm\bar{v}^{2}$ for the pressure P exerted by a gas enclosed in a volume $V$. The term $Nm$ represents
The IUPAC name of $[Ni(CO)_4]$ is
The ionization enthalpy of $He^{+} ion is 19.60 \times10^{-18} J atom^{-1}.$ The ionization enthalpy of $Li^{2+}$ ion will be
The ionic radius of $Cl^{-}$ ion is $1.81\, \mathring A $. The interionic distances of $NaCl$ and $NaF$ are $2.79 \, \mathring A $ and $2.31\, \mathring A $ respectively. The ionic radius of $F^{-}$ ion will be
The ionisation constant of acetic acid is $1.8 \times 10^{-5}$. At what concentration will it be dissociated to 2% ?
The ionisation constant of an acid, $K_a$ is the measure of strength of an acid. The $K_a$ values of acetic acid, hypochlorous acid and formic acid are $1.74 \times 10^{-5}$, $3.0 \times 10^{-8}$ and $1.8 \times 10^{-4}$ respectively. Which of the following orders of $pH$ of $0.1\, mol \,dm^{-3}$ solutions of these acids is correct?
The ionic conductance of following cations in a given conc. is in the order
The inverse square law in electrostatics is$\left|\vec{F}\right| = \frac{e^{2}}{\left(4\pi\varepsilon_{0}\right)\cdot r^{2}}$ for the force between an electron and a proton. The $(\frac{1}{r})$ dependence of $|\vec{F}|$ can be understood in quantum theory as being due to the fact that the ??article? $\left|\vec{F}\right| = \frac{e^{2}}{\left(4\pi\varepsilon_{0}\right)r^{2}}\left[\frac{1}{r^{2}} + \frac{\lambda}{r}\right] \cdot exp \left(-\lambda r\right)$ where $\lambda = m_pc/?$ and $?= \frac{h}{2\pi}$ The change in the ground state energy $(eV)$ of a $H$-atom if $m_p$ were $10^{-6}$ times the mass of an electron. ($r_B =$ Bohr?? radius)
The interparticle forces between linear chains in Nylon-66 are
The internal energy of an ideal gas is :
The interionic distance for cesium chloride crystal will be
The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon
The insecticide Gammexane is a formulation for
The inner transition elements are the elements in which the added electrons go to
The inductive effect