List of practice Questions

Write the mechanism of dehydration of ethanol.
Write short notes on the following: (A) Reimer–Tiemann Reaction
(B) Kolbe’s Reaction
(C) Williamson Ether Synthesis
Discuss the mechanism of unimolecular and bimolecular nucleophilic substitution reactions in haloalkanes.
Write a short note on Coagulation.
‘Action of soap is based on the emulsification and micelle formation.’ Comment on it.
Write a short note on Gabriel’s phthalimide synthesis. Why is Gabriel’s phthalimide synthesis preferred for synthesizing the primary amines?
What do you mean by D and L configurations of carbohydrates? Draw the structural formula of D-Glucose and D-Fructose.
What is half-life for a chemical reaction? Show that the half-life for a first order reaction is independent of the initial concentration of the reactants.
Zn$^{2+}$ salts are colourless while Ni$^{2+}$ salts are coloured. Why?
Define Osmotic pressure. How will you show that Osmotic pressure is a colligative property?
Explain Kohlrausch’s law of independent migration of ions. Mention one application of this law.
Define Lyophilic and Lyophobic colloids with examples. Why is Lyophobic colloids easily coagulated?
Calculate the packing efficiency of body centred cubic (b.c.c.) unit cell.
$H_2O$ is a liquid while $H_2S$ is a gas. Why?
Write a short note on primary and secondary structures of proteins.
The crystal system having dimensions $a \neq b \neq c$ and $\alpha = \beta = \gamma = 90^\circ$ is:
The concentration unit independent of temperature is:
The unit of velocity constant for first order reactions is:
Benzyl alcohol is obtained from benzaldehyde by –
Hinsberg’s reagent is –
Which of the following base is not present in DNA?
What is Schottky defect? What is the effect of the presence of Schottky defect on the density of lattice?
Write chemical equation for the preparation of ozone and its three oxidizing properties.
What is Aqua Regia? What happens when aqua regia reacts with (i) Gold, and (ii) Platinum.
Write chemical equations of two methods of preparation of monohydric alcohol and also write chemical equation of the reactions of ethyl alcohol with conc. sulphuric acid (H$_2$SO$_4$) at different temperatures.