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

What is the action of Zn – Hg / conc. HCl on propanone?

What is the action of Zn – Hg / conc. HCl on propanone?

What is the action of Sodium bisulphite on propanone?

What is the action of Sodium bisulphite on propanone?

Calculate EAN of cobalt (Z=27) in [CO(NH₃)₆]⁺³ and of zinc (Z=30) in [Zn(NH₃)₄]SO₄.

What is the action of hot/concentrated nitric acid on - Antimony.

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

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

Cr(CO)₆ Cr(Z=24)

Write any two uses of Chlorine.

Write cathode and anode reaction in a fuel cell.

An ionic crystal lattice has `r^+/r` radius ratio of 0.320, its coordination number is __

(a) 3

(b) 4

(c) 6

(d) 8

The chemical formula of willemite is __

(a) ZnS

(b) ZnCO₃

(c) ZnO

(d) Zn₂SiO₄

What is the action of chlorine on CS₂

Answer the following.

What is the action of chlorine on Excess NH₃.

How many faradays of electricity are required to produce 13 gram of aluminium from aluminium chloride solution? (Given: Molar mass of Al = 27.0-gram mol^–1)

Write balanced chemical equations for the conversion of `CrO_4^(2-)` to `Cr_2O_7^(2-)` in acidic medium and `Cr_2O_7^(2-)` to `CrO_4^(2-)`
 in basic medium.

Write only reactions for the preparation of benzophenone from benzonitrile.

Write only reactions for the preparation of benzophenone from benzonitrile.

Draw the structures of chloroxylenol.

How many faradays of electricity are required to produce 6 g of Mg from MgCl₂?