List of top Chemistry Questions

The transition metal present in vitamin $B_{12}$ is
The transition metals have a less tendency to form ions due to
The treatment of $CH_3OH$ with $CH_3MgI$ releases $1.04 \,mL$ of a gas at STP. The mass of $CH_3OH$ added is
The total spin resulting from a $d^{7}$ configuration is
The total number of inner transition elements in the periodic table is
The total number of tetrahedral voids in the face centred unit cell is________.
The total number of electrons that take part in forming bond in $O_2$ is
The total energy of an electron in the second excited state of the hydrogen atom is -1.51 eV. The kinetic and potential energies of the electron in this state are respectively
The three important oxidation states of phosphorus are
The third line of the Balmer series in the emission spectrum of the hydrogen atom is due to the transition from the
The tetrahedral voids formed by ccp arrangement of $Cl^{-}$ ions in rock salt structure are
The tendency of $ {BF_3, BCl_3}$ and $ {BBr_3}$ to behave as Lewis acid decreases in the sequence
The tendency of the transition elements to form coloured compounds is attributed to
The temperature at which the r.m.s. velocity of carbon dioxide becomes the same as that of nitrogen at 21 $^\circ$C is
The structure of $ICl^-_2$ is
The structure of $IF_7$ is
The structure and hybridization of $ {Si(CH_3)_4}$ is
The structure of diborane $(B_2H_6)$ contains
The structure of $H_{2}O_{2}$ is
The structure of $H_2O_2$ is
The stopping potential for the photoelectric emitted from a ;metal surface of work function 1.7 eV is 10.4V,Find the wavelength of the radiation used Also identify the energy levels in hydrogen atom, which will emit this Wavelength
The state of hybridisation of S in $SO_2$ is similar to that of
The state of hybridization of xenon in $XeF_6$ is
The standard scale of temperature is
The standard $E^{\circ}$ values of few redox couples are $Zn^{2+}/ Zn = -0.76\, V$, $Ag^+/ Ag = + 0.80 \,V$, $Cu^{2+}/Cu = 0.34\, V$. Choose the correct option.