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

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 uses of iodoform (CHI₃)

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

Write the structure of the products obtained from the following ketones by action of hydrazine in presence of strong base KOH.

Arrange the following solutions in the order of increasing osmotic pressure (π) assuming complete ionization.

1. 0.5M Li₂ SO₄
2. 0.5M KCl
3. 0.5M Al₂ (SO₄)₃ 
4. 0.1 M BaCl₂

In a particular reaction, 2 kJ of heat is released by the system and 8 kJ of work is done on the system. Determine ΔU.