HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions for Chemistry

A reaction occurs in the following steps:

Step 1: \[\ce{NO_{2(g)} + F_2 -> NO2F_{(g)} + F_{(g)}}\] (slow)

Step 2: \[\ce{F_{(g)} + NO_{2(g)} -> NO_2F}\] (Fast)

1. Write the equation of overall reaction.
2. Write the rate law.
3. Identify reaction intermediate.

Derive integrated rate law for zero order reaction.

Define molecularity of reaction.

What are interhalogen compounds?

Hot and concentrated alkali NaOH reacts with chlorine to form _______.

Write the order of ionic character of halides with monovalent metal (M).

Discuss industrial method of preparation of sulfur dioxide from zinc sulfide and iron pyrites.

Write three physical properties of sulfuric acid.

Write any two characteristics of interhalogen compounds.

Write two uses of neon.

How is nitric acid prepared by Ostwald’s process?

Explain the nature of zinc oxide with the help of the reactions.

Write the molecular formula and structures of the peroxy monosulphuric acid.

What happens when dilute sulphuric acid is treated with Fe

What happens when dilute sulphuric acid is treated with CaF₂

Write the molecular and structural formulae of thiosulfuric acid.

Hot and concentrated alkali NaOH reacts with chlorine to form _______.

Write two uses of neon.

Write reactions involved in preparation of potassium dichromate from chrome iron ore

Answer the following

Explain the trends in atomic radii of d block elements.