List of top Chemistry Questions

Concentrated nitric acid used in laboratory work is \(68\%\) nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is \(1.504\, \text{g mL}^{–1}?\)
Give an example of a solid solution in which the solute is a gas.
Apart from tetrahedral geometry, another possible geometry for CH4 is square planar with the four H atoms at the corners of the square and the C atom at its centre. Explain why CH4 is not square planar?
Explain with the help of suitable example polar covalent bond.
How much electricity is required in coulomb for the oxidation of 
(i) 1 mol of H2O to O2. 
(ii) 1 mol of FeO to Fe2O3.

How much electricity in terms of Faraday is required to produce
 (i) 20.0 g of Ca from molten CaCl2.
 (ii) 40.0 g of Al from molten Al2O3.

Conductivity of 0.00241 M acetic acid is 7.896 × 10-5 S cm-1 . Calculate its molar conductivity and if \(\land^0_m\) for acetic acid is 390.5 S cm2 mol-1 , what is its dissociation constant?
The resistance of a conductivity cell containing 0.001M KCl solution at 298 K is 1500 Ω. What is the cell constant if conductivity of 0.001M KCl solution at 298 K is 0.146 x 10-3 S cm-1 .
Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.
Calculate the standard cell potentials of galvanic cells in which the following reactions take place: 
 (i)  \(2Cr_{(S)}+3Cd^{2+}_{(aq)} \rightarrow 2Cr^{3+}_{(aq)}+3Cd\)
 (ii) \(Fe^{2+}_{(aq)}+Ag^+_{(aq)} \rightarrow Fe^{3+}_{(Aq)}+Ag(s)\)
Calculate the \(\triangle_rG^\ominus\) and equilibrium constant of the reactions.
Given the standard electrode potentials, 
K+/K = -2.93V, Ag+/Ag = 0.80V, 
Hg2+/Hg = 0.79V 
Mg2+/Mg = -2.37 V, Cr3+/Cr = - 0.74V 
Arrange these metals in their increasing order of reducing power.
Arrange the following metals in the order in which they displace each other from the solution of their salts.
Al, Cu, Fe, Mg and Zn

Show how will you synthesize:(i) 1-phenyl ethanol from a suitable alkene.
(ii) cyclohexyl methanol using an alkyl halide by an SN2 reaction.
(iii) pentane-1-ol using a suitable alkyl halide?

Which of the following is the correct method of preparation of methyl fluoride?
The standard EMF of Daniel cell is 1.10 volt. The maximum electrical work obtained from the Daniel cell is
The monomer of the polymer:
Polymer
Which one of the following is an inner orbital complex as well as diamagnetic in behaviour ?(Atomic no.: Zn=30,Cr=24 Co=27,Ni=28)
In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?
Which one of the following compounds is most acidic ?
The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is:

<div>Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism ?</div>

Ethyl alcohol is industrially prepared from ethylene by
Considering H2O as a weak field ligand, the number of unpaired electrons in [Mn(H2O6)]2+ will be – (At. no. of Mn = 25)

Write the equation of the reaction of hydrogen iodide with:

(i)1-propoxypropane 

(ii)methoxybenzene 

(iii)benzyl ethyl ether.

Describe the following:
  1. Acetylation
  2. Cannizzaro reaction
  3. Cross aldol condensation
  4. Decarboxylation