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12th Standard Chemistry English Medium - p - Block Elements - II 3 Mark Book Back Question Paper and Answer Key 2022 - 2023

Published on: 01/09/2022

QB365 provides a detailed and simple solution for every Possible Book Back Questions in Class 12 Chemistry Subject - p - Block Elements - II, English Medium. It will help Students to get more practice questions, Students can Practice these question papers in addition to score best marks.

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.

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Std: 12th Standard - Chemistry

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Questions:

Generic 3

4 x 3 = 12

Write the reason for the anomalous behaviour of Nitrogen.

Give the uses of sulphuric acid.

Give the uses of helium.

What are interhalogen compounds? Give examples.

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Answers Key:

Generic 3

4 x 3 = 12

(i) Its small size
(ii) Its high electronegativity
(iii) Its high ionisation energy
(iv) Non-availability of d-orbital in the valence shell.
(v) Rather inert
(vi) High bond energy

(i) Sulphuric acid is used in the manufacture of fertilisers, ammonium sulphate and super phosphates and other chemicals such as HCl, HNO₃.
(ii) It is used as a drying agent and also used in the preparation of pigments, explosives etc.

(i) Helium is used to provide inert atmosphere in electric-arc welding of metals.
(ii) Helium has lowest boiling point hence used in cryogenics.
(iii) It is much less denser than air and hence used for filling air balloons.

Each halogen combines with other halogens to form a series of compounds are called interhalogen compounds.
Example: AB type: BrF
AB₃ type: ICI₃