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

What is the action of phenyl hydrazine on propanone?

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

What is the ratio of volumes of H2 and O2 liberated during electrolysis of acidified water?

(A) 1 : 2

(B) 2 : 1

(C) 1 : 8

(D) 8 : 1

Calculate molarity and molality of 6.3% solution of nitric acid having density 1.04 g cm⁻³
. (H = 1, N = 14, O = 16)

What is the action of chlorine (Cl) on the following:

Cold and dilute caustic soda

What is the action of chlorine (Cl) on the following:

Hot and concentrated caustic soda

What is the action of chlorine (Cl) on the following:

Potassium bromide solution

Calculate the number of atoms present in 2 gram of crystal which has face-centred cubic
(FCC) crystal lattice having edge length of 100 pm and density 10 gcm−3

NF₃ is possible, but NF₅ is not. Why?

State second law of electrolysis

Explain Faraday’s second law of electrolysis

Derive the relation ∆H − ∆U = ∆nRT.

Draw a neat, well labelled diagram of electrolytic cell for extraction of aluminium

How is methoxy benzene prepared from carbolic acid?