Which molecules are polar
H-I, H-O, H-Br, `Br_2`, `N_2`, `I_2` `NH_3`

Use the following molecular formula to determine the valencies of H, Cl, O, S, N, C, Br, I, Na Molecular formulae- H_2, HCl, H_2O,H_2S, NH_3, CH_4, HBr, HI, NaH .

The valencies of the atom H,O and N are 1, 2 and 3 respectively . The molecular formulae of these gaseous elements are H_2 , O_2 and N_2 respectively. How many chemical bonds are there in each of these molecules ?

Which of following process hydrogen bonding H_2S,H_2O,H_2Se,H_2Te show hydrogen bonding in above molecule with help of diagram?

Arrange the following in the order of property indicated for each set:- F_2 , Cl_2, Br_2, I_2, increasing bond dissociation enthalpy.

Determine the valencies of H, Cl, O and Na from the molecular formulae H_2 , HCl, H_2 O and NaCl.

The electronegativity values of C,H,O,N and S are 2.5, 2.1, 3.5, 3.0 and 2.5 respectively. Which of the following is the most polar?

Give the number of electrons in the species H_2^+ , H_2 and O_2^+ .

Refer to pk_a values and answer which compound from the following pairs is stronger base? (C_2H_5)_2NH and (C_2H_5)_3N

The molecules of H_2 present in one gram of H_2 (hydrogen) gas are

In the reaction N_2 + 3H_2 rarr 2NH_3 , the ratio by volume of N_2 , H_2 and NH_3 is 1 : 3 : 2 This illustrate the law of