Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

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

Describe the roles of the following: NaCN in froth floatation process

Silver crystallises in fcc lattice. If edge length of the cell is 4.07 × 10⁻⁸ cm and density is 10.5 g cm⁻³, calculate the atomic mass of silver.

Predict the product of electrolysis in the following:

An aqueous solution of \[\ce{AgNO3}\] with silver electrodes.