Question 2 :
Intermolecular interactions that is dependent on the inverse cube of distance between the new molecules is

Question 3 :
The structure of glycine (amino acid) is $H_{2}N-CH_{2}COO^{-}$ ($z$ witter ion). Select the correct statement:-

Question 4 :
The bonds present in $\left( { N }_{ 2 }{ O }_{ 5 } \right) $ are:<br/>

Question 6 :
In $PO_{4}^{3-}$ ion the formal charge on the oxygen atom of $PO$ bond is<br>

Question 8 :
The bond between two identical non-metal&#160;atoms has a pair of electrons which is:

Question 10 :
Assertion: In the formation of a molecule, only the outer shell electrons take part in chemical combination and they are known as valence electrons. Reason: Atoms achieve the stable octet when they are linked by chemical bonds.

Question 12 :
Among ${ KO }_{ 2 },{ AIO }_{ 2 }^{ - },{ BaO }_{ 2 }\ and\ { NO }_{ 2 }^{ + }$, unpaired electron is present in :<br/>

Question 13 :
An element X has low ionization energy and another element Y has high electron affinity. The bond formed between them could be:

Question 17 :
Which set of compounds in the following pair of ionic compounds has the higher lattice energy?<br/>(I) $KCl$ or $MgO$<br/>(II) $LiF$ or $LiBr$<br/>(III) $MgF_2$ or $NaCl$<br/>

Question 19 :
The formal charges of $N_{(1)}, N_{(2)}$ and $O$ atoms in $: \overset {. .}{N_{(1)}} = N_{(2)} = \overset {. .}{O}:$ are respectively

Question 20 :
Assertion: Ionic bonds are directional in nature whereas covalent bonds are non-directional. Reason: According to orbital overlap concept, the formation of a covalent bond between two atoms results by pairing of electrons present in the valence shell having same spins.

Question 21 :
Which of the following phenomena will occur when two atoms of the elements having same spin of electron approach for bonding?

Question 22 :
You have three solids. One is a metal; one is an ionic compound; one is a molecular/covalent compound. You test all three solid samples to identify their bonding.<br/><table class="wysiwyg-table"><tbody><tr><td>Sample</td><td>Appearance</td><td>Melting Point $(<br/>^{\circ}C)$</td><td>Conductivity</td></tr><tr><td>A</td><td>Shiny</td><td>$962$</td><td>conductive</td></tr><tr><td>B</td><td>Crystalline</td><td>$801$</td><td>conductive in aqueous solution</td></tr><tr><td>C</td><td>Powdery</td><td>$186$</td><td>not conductive<br/></td></tr></tbody></table><br/>Based on this data, identify the type of bonds present in each sample.

Question 23 :
Assertion: In Lewis structures of $NF_3$ and $CO_3^{2-}$ nitrogen and carbon occupy the central position whereas fluorine and oxygen occupy the terminal positions. Reason: In Lewis representation, the least electronegative atom occupies the central position in the molecule/ion.

Question 25 :
Which of the following in inevitable in a chemical bond formation?