HSC Science इयत्ता ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions

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 ______.

In which of the following molecules / ions BF₃, NO₂^– H₂0 the central atom is sp² hybridised?

Some of the following properties of two species, NO₃^– and H₃O⁺ are described below. Which one of them is correct?