19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
In the given structure, the formal charge on the oxygen atom of P ─ O bond is
Calculate the formal charge of C in CH4.
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?
The orbitals used by C in forming C–H and C–Cl bonds of CH2Cl2 are
Which of the following orders is correct for electronegativity?
In sp2 orbital, character of pz orbital will be
CH3 – CH2 – CH = CH2 has hybridisation:
The state of hybridization of the central atom is not the same as in the others:
The hybridization of the central atom in ICl 2 is:
Which of the following angle corresponds to sp2 hybridisation? C = C M(CO)3 C H NC NC
Diagonal hybridisation is the another name of
Assuming the bond direction to the z-axis, which of the overlapping of atomic orbitals of two-atom (A) and (B) will result in bonding? (I) s-orbital of A and px orbital of B (II) s-orbital of A and pz orbital of B (II…
In a compound the number of sigma and pi bonds respectively are :