HSC Science Class 11 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

A liquid which decomposes at its boiling point can be purified by ______.

Assertion: \[\begin{array}{cc}
\ce{CH - C = CH - COOH}\\|\phantom{.}\\
\phantom{........}\ce{COOC2H5}\end{array}\]

Reason: The principal functional group gets lowest number followed by double bond (or) triple bond. 

Give a brief description of the principles of Fractional distillation.

Give a brief description of the principle of column Chromatography.

Explain paper chromatography.

Osomotic pressure (π) of a solution is given by the relation

The bond dissociation energy of methane and ethane are 360 kJ mol^–1 and 620 kJ mol^–1 respectively. Then, the bond dissociation energy of the C-C bond is

What is lattice energy?

At same temperature, which pair of the following solutions are isotonic?

The empirical formula of a nonelectrolyte(X) is CH2 O. A solution containing six gram of X exerts the same osmotic pressure as that of 0.025M glucose solution at the same temperature. The molecular formula of X is

For a solution, the plot of osmotic pressure (π) versus the concentration (c in mol L^-1) gives a straight line with slope 310 R where ‘R’ is the gas constant. The temperature at which osmotic pressure measured is ______.

200 ml of an aqueous solution of a protein contains 1.26 g of protein. At 300 K, the osmotic pressure of this solution is found to be 2.52 × 10^-3 bar. The molar mass of protein will be (R = 0.083 L bar mol^-1 K^-1)

Write down the Born-Haber cycle for the formation of CaCl₂

What is osmosis?

A 0.25 M glucose solution, at 370.28 K has approximately the pressure as blood does what is the osmotic pressure of blood?

Calculate the molality of a solution containing 7.5 g glycine(NH₂-CH₂-COOH) dissolved in 500g of water.

Suggest and explain an indirect method to calculate lattice enthalpy of sodium chloride crystal.

Hybridisation of central atom in PCl₅ involves the mixing of orbitals.

Shape and hybridisation of IF₅ are ______.

The molecules having same hybridisation, shape and number of lone pairs of electons are ______.