List of practice Questions

What happens when (Write chemical equations only): (i) \textit{n}-Butyl chloride reacts with alcoholic KOH?
(ii) Bromobenzene reacts with magnesium in the presence of dry ether?
(iii) Ethyl chloride reacts with aqueous KOH?
(iv) Methyl bromide reacts with sodium in the presence of dry ether?
(v) Ethyl bromide reacts with KCN (alc.)?

How will you convert chlorobenzene into the following? (Write chemical equations only) (i) Benzene
(ii) Phenol
(iii) Toluene
(iv) Aniline
(v) Diphenyl

Ketones do not reduce Fehling’s solution and Tollen’s reagent, while fructose containing ketonic group does. Why?

Classify each of the following solids as ionic, metallic and molecular: P$_4$, Ammonium phosphate, Brass, Tetraphosphorus decoxide (P$_4$O$_{10}$), Rb, I$_2$, LiBr

Explain with reason: (i) The colloidal solution of Fe(OH)$_3$ obtained from FeCl$_3$ is positively charged.
(ii) Alum is used for the purification of water.
(iii) Rivers form a delta while joining a sea/ocean.

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?

Prove the presence of five –OH groups and a –CHO group in glucose molecule, giving chemical equations. How is silver mirror formed from glucose?

Differentiate between molar and molal elevation constants. Give two different formulae involving these two constants for the determination of molecular mass of solute.

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.

Using IUPAC norms, write the systematic names of the following: (i) [Co(NH$_3$)$_6$]Cl$_3$
(ii) K$_3$[Cr(C$_2$O$_4$)$_3$]
(iii) [Pt(NH$_3$)$_2$Cl$_2$]
(iv) [Ni(CO)$_4$]

Amino acids are structural units of:

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%.}

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 $E^\circ_{(Cu^{2+}/Cu)} = +0.34 \, V$

Differentiate between lyophilic and lyophobic colloids.

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

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

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?}

Explain the Resonance effect in nucleophilic substitution reactions of Haloarenes.

Write chemical equations of reactions of haloalkanes with two metals.

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

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

Molarity of pure water is:

Unit of specific conductance is:

Noble gas which forms maximum number of compounds is:

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