List of top Chemistry Questions

Describe Ostwald’s process for the industrial manufacture of nitric acid. Write the balanced chemical equations of the following reactions: (i) Zinc metal reacts with conc. HNO$_3$
(ii) Iodine reacts with conc. HNO$_3$
Write short notes on the following: (A) Reimer–Tiemann Reaction
(B) Kolbe’s Reaction
(C) Williamson Ether Synthesis
Give reason that bleaching action of chlorine is permanent while that of SO$_2$ is temporary.
Explain Werner’s postulates related to the bonding in coordination compounds.
Write the mechanism of dehydration of ethanol.
What happens when Sulphur dioxide reacts with acidic potassium permanganate? Write balanced chemical equation for this reaction.
Write a short note on Coagulation.
What do you mean by D and L configurations of carbohydrates? Draw the structural formula of D-Glucose and D-Fructose.
Zn$^{2+}$ salts are colourless while Ni$^{2+}$ salts are coloured. Why?
‘Action of soap is based on the emulsification and micelle formation.’ Comment on it.
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.
Write a short note on Gabriel’s phthalimide synthesis. Why is Gabriel’s phthalimide synthesis preferred for synthesizing the primary amines?
Calculate the packing efficiency of body centred cubic (b.c.c.) unit cell.
Define Lyophilic and Lyophobic colloids with examples. Why is Lyophobic colloids easily coagulated?
$H_2O$ is a liquid while $H_2S$ is a gas. Why?
Write a short note on primary and secondary structures of proteins.
Explain Kohlrausch’s law of independent migration of ions. Mention one application of this law.
Define Osmotic pressure. How will you show that Osmotic pressure is a colligative property?
The crystal system having dimensions $a \neq b \neq c$ and $\alpha = \beta = \gamma = 90^\circ$ is:
Benzyl alcohol is obtained from benzaldehyde by –
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?
Hinsberg’s reagent is –
The unit of velocity constant for first order reactions is:
The concentration unit independent of temperature is: