HSC Science (Electronics) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

Give an example (reaction) of oxidizing reaction of KMnO₄ in acidic medium.

Write balanced equation of a reaction in which ozone reduces hydrogen peroxide.

Calculate the work done in oxidation of so_2(g) at 25°C if, \[\ce{2SO_{2(g)} + O2_{(g)} -> 2SO_{3(g)}}\], R = 8.314 J K⁻¹ mol⁻¹.

Write any two characteristics of interhalogen compounds.

Write the reaction of the following with concentrated H₂SO₄:

NaCl

Write the reaction of the following with concentrated H₂SO₄:

KNO₃

Write the reaction of the following with concentrated H₂SO₄:

CaF₂

Write any four applications of buffer solution.

What are the basic oxides? Explain with an example.

What is a pseudo first order reaction?

Calculate ΔS of the surrounding if the standard enthalpy of formation of methanol is − 238.9 kJ mol⁻¹.

What are buffer solutions? 

Explain Self interstitial defect in elemental solid.

What is a crystal defect?

Explain the interstitial defect.

Prove that: M₂ = `(W_2RT)/(πV)`.

Calculate the oxidation state of S in oleum

State the uses of iodoform (CHI₃)

State the environmental effects of the following compound:

Freons (CCl₂F₂, CCl₃F, CHClF₂)

Write the structure of the products obtained from the following ketones by action of hydrazine in presence of a slightly acidic medium.