List of top Chemistry Questions

The bond energy of an O - H bond is 109 k cal/mole. When a mole of water is formed then
The bond between phosphate and hydroxyl group of sugar in nucleic acid is
The bond angle in $PH_3$ is close to
The bond angle in $H_2S$ is
The boiling points of hydrides of group 16 are in the order
The bleaching properties of $H_2O_2$ are due to its
The basicity of phosphorus acid is
The binding energy of an electron in the ground state of He-atom is $E_0= 24.7e \,V$The energy required to remove both the electrons from the atom is
The best method to prepare neopentyl chloride is
The basic character of amines is because
The basic component of the smog is
The average molecular speed is greatest in which of the following gas samples ?
The atomicity of various noble gases is
The available space filled in hexagonal close packing pattern in one layer is
The average composition of portland cement is
The atomic number of an element $M$ is $26$. How many electrons are present in the M-shell of the element in its $M^{3+}$ state
The atomic radius increases as we move down a group because
The approximate voltage of dry cell is
The approximate percentage of silica in cement is:
The approximate mass of tritium oxide molecule is
The antiseptic action of Dettol is due to
The anhydride of ortho phosphoric acid is
The angular momentum of electron in $n_{th}$ orbit is given by
The anion $[Co(C_2O_4)_3]^{3-}$ involves hybridization
The angular momentum of an electron is zero. In which orbital may it be present