HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Important Questions for Chemistry

Write the chemical reaction when chlorine reacts with dry slaked lime.

Draw the structure of peroxymonosulphuric acid. 

Arrange the following in the increasing order of the property mentioned:

\[\ce{HOCl}\], \[\ce{HClO2}\], \[\ce{HClO3}\], \[\ce{HClO4}\] (acidic strength)

Arrange the following in the increasing order of the property mentioned:

\[\ce{HF}\], \[\ce{HCl}\], \[\ce{HBr}\], \[\ce{HI}\] (thermal stability)

The hybridisation of phosphorus in phosphorus pentachloride is _______.

(A) dsp³

(B) sp³ d

(C) d² sp³

(D) sp³ d²

Describe the laboratory method of preparation of ammonia

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

Draw the structure of: Orthophosphoric acid 

Draw structure and write geometry of PCl₃ and PCl_5.

What is the action of Excess of air on ammonia ?

What is the action of the following reagents on ammonia : 
Nessler's reagent

Explain brown ring test with the help of chemical equation

Write balanced chemical equations for action of potassium permanganate on: Hydrogen

Draw the structure of: Pyrophosphoric acid

Fe2+ ions react with nitric oxide formed from reduction of nitrate and yields a brown  coloured complex _____________.

How is phosphine prepared using the following reagent ?
HCl

Which of the following is a basic oxide?

(A) SiO₂

(B) P₄O₁₀

(C) MgO

(D) Al₂O₃

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

Draw the structure of H₄P₂O₆ hypophosphoric acid

What is the action of Excess of chlorine on ammonia?