HSC Science (Computer Science) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions for Chemistry

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?

Write chemical equation for the following:
Gatterman - Koch formylation

Write chemical equation for the following:
Gatterman - Koch formylation

How is potassium dichromate prepared from chrome iron ore?

What is the role of the following compound- 
SiO₂ in the extraction of copper from copper pyrites?

Write chemical equation for the following :
Rosenmund reduction

Write chemical equation for the following :
Rosenmund reduction

How will you convert calcium acetate to acetaldehyde?

How will you convert calcium acetate to acetaldehyde?

Complete the following statement by selecting the correct alternative from the choices given: 

In a face-centered cubic lattice, atom (A) occupies the comer positions and atom (B) occupies the face centre positions. If one atom of (B) is missing from one of the face-centered points, the formula of the compound is:

How much quantity of electricity in coulomb is required to deposit 1.346 × 10^-3 kg of Ag in 3.5 minutes from AgNO₃ solution?
( Given: Molar mass of Ag is 108 × 10^-3 kg mol^-1 )

Which of the following compounds of chlorine is used as refrigerant?