List of practice Questions

At 300 K, 0.06 kg of an organic solute is dissolved in 1 kg of water. The vapour pressure of the solution is 3.768 kPa. If the vapour pressure of pure water at that temperature is 3.78 kPa, what is the molar mass of the solute (in g mol\(^{-1}\))?
The molar conductivity of 0.02 M solution of an electrolyte is \( 124 \times 10^{-4} \) S m\(^{2}\) mol\(^{-1}\). What is the resistance of the same solution (in ohms), kept in a cell of cell constant 129 m\(^{-1}\)?
The decomposition of benzene diazonium chloride is a first-order reaction. The time taken for its decomposition to \( \frac{1}{4} \) and \( \frac{1}{10} \) of its initial concentration are \( t_{1/4} \) and \( t_{1/10} \) respectively. The value of \( \frac{t_{1/4}}{t_{1/10}} \times 100 \) is: (Given: log 2 = 0.3)
The integral \( \int \tan^5 x \sec^2 x \, dx \) is equal to:
Cheilosis disease and digestive disorders are caused by the deficiency of:

What is the total number of sigma bonds found in the following compound?
\[ \text{CH}_3\text{CH} = \text{C} = \text{CH} - \text{C} \equiv \text{C} - \text{H} \]

Which of the following carboxylic acids has the highest pKa?
 

Which of the following base is not present in RNA molecule?
Which is the incorrect statement with regard to 1-phenylethanol?
The following reaction:
\[ {CH}_3{Br} + {AgF} \rightarrow {CH}_3{F} + {AgBr} \] is known as:
Which of the following cannot be prepared by the reduction of either a ketone or an aldehyde with NaBH\(_4\) in methanol?
The alkene that exhibits optical isomerism is:
In which of the following reaction Lindlar's catalyst is used?
The IUPAC name of the co-ordination compound \([Co(NH_3)_4(H_2O)Cl]Cl_2\) is:
Which lanthanide element has half-filled 4f orbitals in its +3 state?
Which of the following explains why dimethyl ether has lower boiling point than its isomeric compound, ethanol?
Which of the following 3d block element exhibits +2, +3, +4, +5, +6 and +7 oxidation states?
For which of the following molecules, resonance structures are necessary to describe the bonding satisfactorily?
For which one of the following equilibria, \( K_P = K_C \)?
In which of the following equilibrium, increase in pressure shifts the equilibrium in the forward direction?
The sum of the oxidation numbers of all the carbon and oxygen atoms in carbonate ion is:
Some enzyme catalysed reactions which occur at metal surfaces are:
Which of the following aqueous mixture is a buffer solution?
Which of the following molecule has the highest dipole moment?
Which of the following isoelectronic species has the smallest radius?