List of top Chemistry Questions

Amongst the following 3d-series elements, having highest value of first ionization enthalpy is ________.
The pOH of 0.01 M HCl solution is ________.
Write chemical formula of epsom salt. Give two uses of \( H_2SO_4 \).
A chemical reaction occurs in two steps :
(i) \( NO_2Cl(g) \xrightarrow{\text{slow} NO_2(g) + Cl(g) }\)
(ii) \( NO_2Cl(g) + Cl(g) \xrightarrow{\text{fast}} NO_2(g) + Cl_2(g) \)
(a) Write down the rate law.
(b) Identify the reaction intermediate.
Convert, ethanoic acid to ethanol.
Explain the mechanism of alkaline hydrolysis of bromomethane.
Acetic acid is 5% ionised in its decimolar solution. Calculate the dissociation constant of acetic acid.
Draw neat and labelled diagram of lead accumulator.
Write two advantages of hydrogen - oxygen fuel cell.
Write the name of catalyst used in preparation of HDP.
Calculate effective atomic number of \( Fe^{2+} \) in \( [Fe(CN)_6]^{4-} \) [ Given : (Z = 26) ]
Draw structure of isoprene unit of natural rubber.
Define : Molecularity of reaction
State and explain Hess's law of constant heat summation.
Define : Schottky defect
Define : Ferromagnetism
The rate of A + B \(\rightarrow\) P is \(3.6 \times 10^{-2}\) mol/\(dm^3\)/s. When [A] = 0.2 M and [B] = 0.1 M. Calculate the rate constant if reaction is first order in B and second order in A.
Define : Isotonic solution
Draw the structure of 2, 4 - dinitrophenylhydrazone of acetaldehyde.
Define : Common ion effect.
Write the structure of zwitter ion of sulfanilic acid. Write the reaction between benzene diazonium chloride and phenol in alkaline medium.
Write preparation of glucose from starch.
Write the postulates of Werner's theory of co-ordination complexes.
Write Tollen's reagent test for acetaldehyde.
What is the action of ethane-1, 2 - diol on acetone?