12th Standard Syllabus & Materials

12th Standard

TN 12th English Poem - 6 - Incident of the French Camp Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Prose - 6 - On the Rule of the Road Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Prose - 5 - The Chair Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Supplementary - 4 - The Midnight Visitor Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Poem - 4 - Ulysses Sample Question Papers Study Material - QB365 Set A

NEW

12th Standard

TN 12th English Prose - 4 - The Summit Sample Question Papers Study Material - QB365 Set A

12th Standard English Medium Chemistry Subject p - Block Elements - II Creative 2 Mark Questions with Solution Part - II updated Creative Questions

Published on: 13/05/2022

QB365 provides detailed and simple solution for every Creative Questions in class 12 Chemistry Subject. It will helps to get more idea about question pattern in
every Creative questions with solution.

latest Creative Questions

Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

Questions + Answers key

Take MCQ Chemistry Test

QB365 Student Learing Managemnet System

Std: 12th Standard - Chemistry

chapter: - Creative Questions

Visit QB365-SLMS - https://www.qb365.in/slms/ Complete Questions and Answers

Questions:

Generic 2

5 x 2 = 10

(i) Nitric oxide becomes brown when released in air. Why?
(ii) BiCl₃ is more stable than BiCl₃, Why?

Explain Why in spite of nearly the same electronegativity, nitrogen forms hydrogen bonding while chlorine does not - Give reason.

Arrange the following as indicated below:
(i) F₂, Cl₂, Br₂, I₂ - increasing bond dissociation enthalpy.
(ii) HF, HCI, HBr, HI - increasing acidic strength.

Give the reason for bleaching action of Cl₂.

How is SO₂ an air pollutant?

Visit QB365-SLMS - https://www.qb365.in/slms/

Answers Key:

Generic 2

5 x 2 = 10

(i) Nitric oxide combines with oxygen when: exposed air to give nitrogen dioxide which is brown in colour.
\(2NO+{ O }_{ 2 }\longrightarrow { 2NO }_{ 2 }\)
(ii) Bi has little tendency to form pentahalides because +5 oxidation state of Bi is much less stable than +3 oxidation state due to inert pair effect.

Nitrogen has smaller size and can polarise N-H bond d more efficiently than chlorine can do in a CI-H bond. Hence, nitrogen forms H- bond, while chlorine does not.

(i) l₂< F2 < Br₂ < Cl₂·
(ii) HF < Hq < HBr < HI.

(i) Bleaching action of Cl₂ is due to its oxidising property.
(ii) In aqueous solution, Cl₂ liberates nascent oxygen which brings about the oxidation of coloured substances present in vegetables and organic matter to colourless substances.
\(\mathrm{Cl}_{2}+\mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{HCl}+\mathrm{[O}]\)
Coloured substance +[O] → colorless substance.

(i) SO₂ present in the atmosphere dissolves in rain water and causes acid rain.
(ii) Acid rain destroys buildings, inhibits plant growth and also causes eye irritation in human.