PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

If NaCl is doped with 10⁻³ mol % of SrCl₂, what is the concentration of cation vacancies?

Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving 1.0 g of polymer of molar mass 185,000 in 450 mL of water at 37°C.

At 300 K, 36 g of glucose present in a litre of its solution has an osmotic pressure of 4.98 bar. If the osmotic pressure of the solution is 1.52 bars at the same temperature, what would be its concentration?

Determine the amount of CaCl₂ (i = 2.47) dissolved in 2.5 litre of water such that its osmotic pressure is 0.75 atm at 27°C.

Determine the osmotic pressure of a solution prepared by dissolving 25 mg of K₂SO₄ in 2 liter of water at 25°C, assuming that it is completely dissociated.

What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?

What are micelles? Give an example of a micellers system.

Calculate the overall complex dissociation equilibrium constant for the Cu(NH₃)₄²⁺ ion, given that β₄ for this complex is 2.1 × 10¹³.

What is meant by stability of a coordination compound in solution?

Where does the water present in the egg go after boiling the egg?

What is the effect of denaturation on the structure of proteins?

Write a short note on diazotisation.

Give the IUPAC name of the following compound:

PhCH₂CH₂COOH

Give the IUPAC name of the following compound:

(CH₃)₂C=CHCOOH

Give the IUPAC name of the following compound:

Give the IUPAC name of the following compound:

Why carboxylic acid does not give reactions of carbonyl group?

Illustrate the following reaction giving suitable example in each case: Diazotisation

Following reactions occur at cathode during the electrolysis of aqueous silver chloride solution :

`Ag^+(aq)+e^(-)rarrAg(s)" ""      ""       "E^@=+0.80V`

`H^+(aq)+e^(-)rarr1/2H_2(g)" "" "" " E^@=0.00V`

On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why ?

Define the following term :

Peptization