NCERT Solutions for Class 12 Chemistry Chapter 2 Solutions
NCERT Solutions for Class 12 Chemistry Chapter 2 Solutions
Chapter: Chapter 2 – Solutions
Question 2.23:
Suggest the most important type of intermolecular attractive interaction in the following pairs.
(i) n-hexane and n-octane
(ii) I2 and CCl4
(iii) NaClO4 and water
(iv) methanol and acetone
(v) acetonitrile (CH3CN) and acetone (C3H6O).
Answer
(i) Van der Wall’s forces of attraction.
(ii) Van der Wall’s forces of attraction.
(iii) Ion-diople interaction.
(iv) Dipole-dipole interaction.
(v) Dipole-dipole interaction.
Question 2.24:
Based on solute-solvent interactions, arrange the following in order of increasing
solubility in n-octane and explain. Cyclohexane, KCl, CH3OH, CH3CN.
Answer
n-octane is a non-polar solvent. Therefore, the solubility of a non-polar solute is more than that of a polar solute in the n-octane.
The order of increasing polarity is:
Cyclohexane < CH3CN < CH3OH < KCl
Therefore, the order of increasing solubility is:
KCl < CH3OH < CH3CN < Cyclohexane
Amongst the following compounds, identify which are insoluble, partially soluble and highly soluble in water?
(i) phenol (ii) toluene (iii) formic acid
(iv) ethylene glycol (v) chloroform (vi) pentanol.
Answer
(i) Phenol (C6H5OH) has the polar group −OH and non-polar group −C6H5. Thus, phenol is partially soluble in water.
(ii) Toluene (C6H5−CH3) has no polar groups. Thus, toluene is insoluble in water.
(iii) Formic acid (HCOOH) has the polar group −OH and can form H-bond with water.
Thus, formic acid is highly soluble in water.
(iv) Ethylene glycol has polar −OH group and can form H−bond. Thus, it is highly soluble in water.
(v) Chloroform is insoluble in water.
(vi) Pentanol (C5H11OH) has polar −OH group, but it also contains a very bulky nonpolar −C5H11 group. Thus, pentanol is partially soluble in water.
NCERT Solutions For Class 12 Chemistry PDF Download
- Chapter 1 The Solid State NCERT Solutions Class 12 Chemistry
- Chapter 2 Solutions NCERT Solutions Class 12 Chem
- Ch 3 Electro chemistry NCERT Solutions Class 12 Chemistry
- Chapter 4 Chemical Kinetics NCERT Solutions Class 12 Chem
- Chapter 5 Surface Chemistry Class 12 Chemistry Download
- Ch 6 General Principles and Processes of Isolation of Elements Chemistry Download
- Chapter 7 The p Block Elements NCERT Solutions Class 12 Chemistry
- Chapter 8 The d and f Block Elements NCERT Solutions Class 12th
- Ch 9 Coordination Compounds NCERT Solutions Class 12
- Chapter 10 Haloalkanes and Haloarenes NCERT Chemistry
- Chapter 11 Alcohols Phenols and Ethers NCERT Chemistry Download
- Ch 12 Aldehydes Ketones and Carboxylic Acids NCERT Solutions Class 12
- Chapter 13 Amines NCERT Solutions Class 12 Chemistry
- Chapter 14 Biomolecules NCERT Solutions Class 12 Chemistry
- Ch 15 Polymers NCERT Solutions Chemistry Download
- Chapter 16 Chemistry in Everyday Life Chemistry Download