19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which has a maximum dipole moment? (a) (b) (c) (d)
Which of the following substances has the least covalent character?
Match List - I with List- II. Choose the correct answer from the options given below : (NEET 2022) List-I(Hydrides) List-II(Nature)
Amongst the following which one will have maximum 'lone pair- lone pair' electron repulsions? (NEET 2022)
Which amongst the following is incorrect statement? (NEET 2022)
The geometry of sulphate ion is (AFMC 2009)
If I2 is dissolved in aqueous KI, the intense yellow species 3I is formed. The structure of 3I ions is (DUMET 2009)
A covalent molecule AB3 has a pyramidal structure. The number of lone pair and bond pair of electrons in the molecule are respectively (KCET 2009)
What is the dominant intermolecular force or bond that must be overcome in converting liquid CH3OH to a gas? (AIPMT 2009)
Which of the following has the lowest boiling point? (Punjab PMET 2008)
The angular shape of ozone molecule (O3) consists of (CBSE AIPMT 2008)
Which of the following is weakest? (BHU 2008)
Least ionized salt is (RPMT 2007)
Electron deficient molecule is (RPMT 2007)
The boiling points at atmospheric pressure of HF, H2S, NH3 can be arranged in the following order:
The order number of the boiling points of the given compounds is
An ether is more volatile than alcohol having the same molecular formula. This is due to
What happens to the London forces, if the number of electrons increases?
Which of the following hydrogen bonds is the strongest?
o-nitrophenol can be easily steam distilled whereas p-nitrophenol cannot be. This is because of :
The Lewis dot structures can be written by adopting the following steps : I. The total number of electrons required for writing the structure are obtained by adding the valence electrons of the combining atoms. II. Kn…
According to Lewis and Kossel approach, which of the following molecules has complete octet of the central atom?
Match the following species of Column I with information given in Column II choose the correct option from the codes given below. Column I Column II A. BCl3 1. Odd electron molecules B. SF6 2. Incomplete octet C. NO2 …
Atoms can combine either by transfer of valence electrons from one atom to another or by sharing of valence electrons in order to have an octet in their valence shells. This is called.
Lewis postulated that atoms achieve the stable octet when they are linked by