Types of Hydrogen Bonding

Q.

Which of the following statements are correct?

1. The crystal lattice of ice is mostly formed by covalent as well as hydrogen bonds.

2. The density of water increases when heated from to due to the change in the structure of the cluster of water molecules

3. Above the thermal agitation of water molecules increases. Therefore, intermolecular distance increases and water starts expanding.

4. The density of water increases from to a maximum at because the entropy of the system increases.

Q.

Which of these have inter-molecular hydrogen bond?

1. 

2. 

3. 

4. 

Q.

Intra-molecular H-bonding is present in

1. O-nitro phenol

2. salicylaldehyde

3. m-nitro phenol

4. all (a) and (c)

Q. o-nitrophenol is steam volatile, whereas p-nitrophenol is not. This is due to:

1. The presence of intermolecular H-Bonding in o-nitrophenol
2. The presence of intramolecular H-Bonding in o-nitrophenol
3. The presence of intramolecular H-Bonding in p-nitrophenol
4. None of these

Q. Which one of the following compounds shows the presence of intramolecular hydrogen bond ?

1. Cellulose
2. Concentrated acetic acid
3. $H_2{O}_2$
4. $HCN$

Q. Which among the following is steam volatile?

1. o-nitrophenol
2. Aniline
3. Glycerol
4. p-nitrophenol

Q. In which of the following I is more volatile than II?

1. 
2. 
3. $\begin{array}{cc}\left(I\right)H_{2}O& \left(II\right)H_{2}S\end{array}$
4. $\left(I\right)C{H}_{3}C{H}_2-OH\left(II\right)C{H}_3-O-C{H}_3$

Q. Amongst the three isomers of nitrophenol, the one that is least soluble in water is ortho nitrophenol.

Q. The pair of molecules which forms the strongest intermolecular hydrogen bonds is:

1. $Si{H}_4$ and $Si{F}_4$
2. $HCOOH$ and $C{H}_{3}COOH$
3. all of the above
4. $C{H}_3-C{H}_2-C{H}_3$ and $CHC{l}_3$

Q. $HCl$ is gas but $HF$ is a low boiling liquid. This is because

1. $HF$ is a weak acid
2. $H-F$ bond is strong
3. $H-F$ bond is weak
4. Molecules aggregate because of hydrogen bonding