HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

Write the factors which are related to the colour of transition metal ions.

Define racemic mixture.

What is ‘effective atomic number’ (EAN)?

Calculate the effective atomic number of the central metal atom in the following  compounds:

K₄Fe(CN)₆  Fe(Z=26)

Write a note on ‘aldol condensation’.

An ionic crystal lattice has limiting value of radius ratio as 0.414 to 0.732; the co-ordination number of its cation is _______.

(A) 6

(B) 4

(C) 3

(D) 12

How is nitric acid prepared by Ostwald’s process?

Construct a labelled diagram for the following cell:

`Zn|Zn^(2+)(1M)||H^+(1M)|H_(2(g,1atm))|Pt`

Write the names and chemical formulae of any ‘two’ minerals of aluminium.

Arrange the following oxyacids of chlorine - HClO, HClO₂, HClO₃, and HClO₄ with respect to increasing order of thermal stability.

Effective atomic number rule is used to find _______.
(A) geometry of complex
(B) stability of complex
(C) number of isomers of complex
(D) number of possible ligands around metal ion in complex

Which one of the following ions is coloured?

Explain basic nature of amines.

What is the action of phenyl hydrazine on propanone?

Which among the following minerals does NOT contain aluminium?

(a) Cryolite

(b) Siderite

(c) China clay

(d) Corundum

Explain the following methods to protect metals from corrosion:

Galvanization

Explain the following methods to protect metals from corrosion:

Passivation

Draw neat labelled diagram of electrolytic refining of blister copper

What happens when thin copper leaves are thrown in jar containing chlorine?

Which of the following parameters are correct for triclinic lattice?

(A) α = β = γ = 90° and a = b = c

(B) α ≠ β ≠ γ = 90° and a ≠ b ≠ c

(C) α = γ = 90°, β ≠ 90° and a ≠ b ≠ c

(D) α ≠ β ≠ γ ≠ 90° and a ≠ b ≠ c