List of practice Questions

Out of benzene, m-dinitrobenzene and toluene which will undergo nitration most easily and why?
Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.
The degree of ionization of a 0.1M bromoacetic acid solution is 0.132. Calculate the pH of the solution and the pKa of bromoacetic acid.
Explain why the following systems are not aromatic?
Explain why the following systems are not aromatic
The pH of 0.005M codeine (C18H21NO3) solution is 9.95. Calculate its ionization constant and pKb.
How will you convert benzene into 
  1. p-nitrobromobenzene
  2. m-nitrochlorobenzene 
  3. p -nitrotoluene
  4. acetophenone
What is the pH of 0.001M aniline solution? The ionization constant of aniline can be taken from Table 6.7. Calculate the degree of ionization of aniline in the solution. Also calculate the ionization constant of the conjugate acid of aniline.
Calculate the degree of ionization of 0.05M acetic acid if its pKa value is 4.74. How is the degree of dissociation affected when its solution also contains (a) 0.01M (b) 0.1M in HCl ?
The ionization constant of dimethylamine is 5.4 × 10–4. Calculate its degree of ionization in its 0.02M solution. What percentage of dimethylamine is ionized if the solution is also 0.1M in NaOH?
For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated: 
  1. C4H8 (one double bond) 
  2. C5H8 (one triple bond)
Write IUPAC names of the products obtained by the ozonolysis of the following compounds:
  1. Pent-2-ene 
  2. 3,4-Dimethyl-hept-3-ene 
  3. 2-Ethylbut-1-ene
  4. 1-Phenylbut-1-ene
An alkene 'A' on ozonolysis gives a mixture of ethanal and pentan-3-one. Write structure and IUPAC name of 'A'.
An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C \(\pi\) bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.
Propanal and pentan-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene?
Write chemical equations for combustion reaction of the following hydrocarbons:
  1. Butane
  2. Pentene
  3. Hexyne
  4. Toluene
Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?
Factorise : (i) 12x 2 – 7x + 1 (ii) 2x 2 + 7x + 3 (iii) 6x 2 + 5x – 6 (iv) 3x 2 – x – 4.
Why will a sheet of paper fall slower than one that is crumpled into a ball?
Why is benzene extra ordinarily stable though it contains three double bonds?
State which of the following situations are possible and give an example for each of these: 
  1. an object with a constant acceleration but with zero velocity 
  2. an object moving with an acceleration but with uniform speed. 
  3. an object moving in a certain direction with an acceleration in the perpendicular direction.
Gravitational force on the surface of the moon is only \(\frac{1}6\) as strong as gravitational force on the earth. What is the weight in newtons of a 10 kg object on the moon and on the earth?
An artificial satellite is moving in a circular orbit of radius 42250 km. Calculate its speed if it takes 24 hours to revolve around the earth.
Calculate the hydrogen ion concentration in the following biological fluids whose pH are given below: 
(a) Human muscle-fluid,6.83 
(b) Human stomach fluid,1.2 
(c) Human blood,7.38 
(d) Human saliva,6.4
Make a comparison and write down ways in which plant cells are different from animal cells.
Write IUPAC names of the following compounds:
IUPAC names of the following compounds