List of top Chemistry Questions

Describe Ostwald’s process for the manufacture of nitric acid. How will you detect NO$_3^-$ radical in this acid? Give equations for reactions involved.

Answer the following: (i) How do the atomic radii of transition metals vary across a series and why?
(ii) Ions of transition metals are generally paramagnetic. Why?
(iii) Transition elements show different oxidation states. Why?

Calculate the mass of a non-volatile solute (molar mass $40 \, \text{gm mol}^{-1}$) which should be dissolved in $114 \, \text{gm$ octane to reduce its vapour pressure to 80%.}

1 : 1 Molar mixture of FeSO$_4$ and (NH$_4$)$_2$SO$_4$ gives test of Fe$^{2+$ ions, but 1 : 4 molar mixture of CuSO$_4$ and NH$_3$ (aq) does not give test of Cu$^{2+}$ ions. Why?}

Differentiate between lyophilic and lyophobic colloids.

Amino acids are structural units of:

Calculate the standard e.m.f. of the following cell:
Zn $\mid$ Zn$^{2+}$ $\parallel$ Cu$^{2+}$ $\mid$ Cu
Given: $E^\circ_{(Zn^{2+}/Zn)} = -0.76 \, V$ and $E^\circ_{(Cu^{2+}/Cu)} = +0.34 \, V$

What is Kohlrausch’s law? Write its one application with example.

Give any two dehydrating properties of H$_2$SO$_4$.

Write short notes on the following:
(i) Aldol and Crossed Aldol Condensation in Aldehyde and Ketone
(ii) Cannizzaro Reaction

Unit of specific conductance is:

Write chemical equations of five methods of preparation of Carboxylic acid.

Noble gas which forms maximum number of compounds is:

Write chemical equations of reactions of haloalkanes with two metals.

Molarity of pure water is:

Explain the Resonance effect in nucleophilic substitution reactions of Haloarenes.

Formation of coloured ions is possible due to the presence of:

Write chemical equation for identifying primary and secondary alcohol.

Write chemical equation and mechanism of acid catalysed hydration of Alkene.

In spite of being an electron withdrawing group, why does chlorine act as ortho-para directing group in aromatic electrophilic substitution reactions?

Write notes on the following:
(I) Wurtz–Fittig reaction
(II) Sandmeyer reaction

Explain Crystal Field Theory (CFT) in coordination compounds and write its limitations.

Describe the industrial method of preparation of Ammonia giving flow diagram and chemical equation and write chemical equation of the reaction of Ammonia with (i) Copper ion, and (ii) Silver ion.

Differentiate between primary, secondary and tertiary amines. (Write chemical equations)

Write Nernst equation and its one application in chemical cells.