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

Name the method used for the refining of zirconium.

What is the difference between native protein and denatured protein?

An element crystallizes in a f.c.c. lattice with a cell edge of 250 pm. Calculate the density if 300 g of this element contains 2 × 10²⁴ atoms. 

Name the method of refining of metals such as Germanium.

For the complex [Fe(CN)₆]^3–, write the hybridization type, magnetic character and spin nature of the complex. (At. number : Fe = 26).

Write the hybridization and magnetic behaviour of the complex [Ni(CO)₄].

(At.no. of Ni = 28)

How do you convert the following :
Phenol to anisole

What is the difference between fibrous protein and globular protein ?

Write the structures of main products when aniline reacts with the following reagents :

Br₂ water

Write the structures of main products when aniline reacts with the following reagents :

(CH₃CO)₂O/pyridine

What is the principle behind the zone refining of metals?

Write the hybridization and shape of the following complexe : [CoF₆]^3–

(Atomic number : Co = 27, Ni = 28)

Write the hybridization and shape of the following complexe : [Ni(CN)₄]^2–

^{(Atomic number : Co = 27, Ni = 28)}

Write the chemical equations involved when aniline is treated with the following reagents:

Br₂ water

A compound 'A' of molecular formula C₂H₃OCl undergoes a series of reactions as shown below. Write the structures of A, B, C and D in the following reactions :

An element with density 2.8 g cm^–3 forms a f.c.c. unit cell with edge length 4 x 10^–8 cm. Calculate the molar mass of the element.

(Given : N_A = 6.022 x 10²³ mol ^–1)

Explain the principle of the method of electrolytic refining of metals. Give one example.

Write the equations involved in the following reactions : Williamson synthesis

A solution of glucose (molar mass = 180 g mol^–1) in water is labelled as 10% (by mass). What would be the molality and molarity of the solution ? (Density of solution = 1.2 g mL^–1)

Write the products formed when CH₃CHO reacts with the following reagents: CH₃CHO in the presence of dilute NaOH