PUC Science 2nd PUC Class 12 - Karnataka Board PUC Question Bank Solutions for Chemistry

How will you bring about the following conversions?

Propanone to propane

Give simple chemical tests to distinguish between the following pairs of compounds:  Benzoic acid and Phenol

State Kohlrausch Law.

Write the final product(s) in each of the following reactions:

Write the structural difference between starch and cellulose.

What is the role of sulphur in the vulcanisation of rubber?

Write the chemical reaction involved in Wolff-Kishner reduction.

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 main products when

2, 4, 6-trinitrochlorobenzene is subjected to hydrolysis

Which one of the following is a polysaccharide:

Starch, Maltose, Fructose, Glucose

Draw the structures of the following: H₄P₂O₇ (Pyrophosphoric acid)

Write the main product(s) in each of the following reactions:

Write the structures of A, B, C, D and E in the following reactions:

What is the basicity of H₃PO₄?

Define limiting molar conductivity.

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

Predict the products of the following reactions :

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.

Write the structures of the main products when acetone (CH₃ − CO − CH₃) reacts with the following reagent :

Zn − Hg/conc. HCl

What is the basicity of H₃PO₃ ?