Question Bank Directory

The correct statement regarding RNA and DNA, respectively is:

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic mass $16$ is:

D(+) glucose yields an oxime with hydroxyl amine. The structure of the oxime would be:

Match the compounds of Xe in Column I with the molecular structure in Column II. Column-I (a) $XeF_{2}$ (b) $XeF_{4}$ (c) $XeO_{3}$ (d) $XeOF_{4}$ Column-II (i) Square planar (ii) Linear (iii) Square pyramidal (iv) Pyramidal

In which of the following pairs, the two species are iso-structural?

In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids:

Arrange the following species in increasing order of their dipole moments: $NH_3, NF_3, BF_3, H_2O$

Choose the compound which has a maximum bond angle at nitrogen among the following:

$d\pi - p\pi$ bond is present in:

A diatomic molecule, among the following species, that only has $\pi$ bonds according to the Molecular Orbital Theory (MOT) is:

The dipole moment of compound AB is 10.92 D and that of compound CD is 12.45 D. If the bond length of AB is 2.72 $\text{\AA}$ and that of CD is 2.56 $\text{\AA}$, then for these compounds the correct statement is:

In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction?

A molecule among the following that has the maximum dipole moment is:

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is:

The correct state of hybridisation of C2, C3, C5 and C6 of the hydrocarbon $$ \overset{1}{\text{HC}} \equiv \overset{2}{\text{C}} - \overset{3}{\text{CH}}_2 - \overset{4}{\text{CH}} = \overset{5}{\text{CH}} - \overset{6}{\text{CH}}_3 $$ is in the sequence:

Identify the incorrect statement among the following:

Consider the following List-I and List-II: **List-I (Molecule)** (a) $PCl_{5}$ (b) $SF_{6}$ (c) $BeCl_{2}$ (d) $NH_{3}$ **List-II (Shape or geometry)** (i) Trigonal planar (ii) Octahedral (iii) Linear (iv) Trigonal pyramidal Identify the **wrong** match from the given pairs:

Predict the correct order among the following.

The pair of electrons in the given carbanion, $\text{CH}_3\text{C}\equiv\text{C}^-$, is present in which of the following orbitals?

Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them.