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

Give an example each of a molecular solid and an ionic solid.

Write the chemical equation involved in the following reaction:

Hoffmann-bromamide degradation reaction

Gas (A) is more soluble in water than Gas (B) at the same temperature. Which one of the two gases will have the higher value of KH (Henry’s constant) and why

When a coordination compound CoCl₃.6NH₃ is mixed with AgNO₃, 3moles of AgCl are precipitated per mole of the compound. Write the IUPAC name of the coordination compound.

The conductivity of 0.001 mol L-1 solution of CH₃COOH is 3.905× 10-5 S cm-1. Calculate its molar conductivity and degree of dissociation (α) Given λ°(H⁺)= 349.6 S cm² mol-1 and λ°(CH₃COO)= 40.9S cm²mol^-1.

Write the IUPAC name of the given compound:

State Henry’s law.

Why do gases always tend to be less soluble in liquids as the temperature is raised?

Write down the IUPAC name of the following complex: [Co(NH₃)₅ (NO₂)](NO₃)₂

A first order reaction takes 23.1 minutes for 50% completion. Calculate the time required for 75% completion of this reaction.

(log 2 = 0.301, log 3 = 0.4771, log 4 = 0.6021)

Write the IUPAC name of the given compound:

When a co-ordination compound CrCl₃.6H₂O is mixed with AgNO₃, 2 moles of AgCl are precipitated per mole of the compound. Write

(i) Structural formula of the complex.

(ii) IUPAC name of the complex.

Write down the IUPAC name of the following complex: [Cr(NH₃)₂Cl₂(en)]Cl (en = ethylenediamine)

Define limiting molar conductivity.

Why conductivity of an electrolyte solution decreases with the decrease in concentration ?

A first order reaction takes 30 minutes for 50% completion. Calculate the time required for 90% completion of this reaction.

(log 2 = 0.3010)

Write down the IUPAC name of the complex [Pt(en)₂Cl₂]²⁺. What type of isomerism is shown by this complex?

The conductivity of 0.20 mol L⁻¹ solution of KCl is 2.48 × 10⁻² S cm⁻¹. Calculate its molar conductivity and degree of dissociation (α). Given λ⁰ (K⁺) = 73.5 S cm² mol⁻¹ and λ⁰ (C1⁻) = 76.5 S cm² mol⁻¹.

Why does the conductivity of a solution decrease with dilution?

Explain the principle of the method of electrolytic refining of metals. Give one example.