CBSE Exam Date Sheet released on 12.03.2022

Central Board of Secondary Education ( CBSE) India, Has released Term-2 Examination Schedule for session 2021-22. It covers a lot of fraction of regular summer vacation period.
केंद्रीय माध्यमिक शिक्षा बोर्ड (सीबीएसई) भारत ने सत्र 2021-22 के लिए टर्म-2 परीक्षा कार्यक्रम जारी कर दिया है। इसमें नियमित गर्मी की छुट्टियों की अवधि के बहुत से हिस्से को शामिल किया गया है।

CBSE Term-2 Examination Date-sheet-class 12th_2022 Download

CBSE Term-2 Examination Date-sheet-class 10th_2022 Download

Grade X Term II Board Examination

27.04.22 – English
05.05.22 – Mathematics
10.05.22 – Science
14.05.22 – Social Science
18.05.22 – Hindi

Grade XII Term II Board Examination
Science Stream
02.05.22 – Hindi Core
07.05.22 – Chemistry
13.05.22 – English
20.05.22 – Physics
30.05.22 – Biology
07.06.22 – Mathematics

Grade XII Term II Board Examination
Commerce Stream
02.05.22 – Hindi Core
13.05.22 – English
17.05.22 -Business Study
23.05.22 -Accountancy
28.05.20 -Economics
07.06.22 – Mathematics

Detection of functional group in a given organic compound Class 12 (CBSE) Practical

(Detection of Functional Group In given Unknown Organic Sample)
It carries 2 marks in CBSE Class 12 Science Practical Term II Examination 2021-22 session
Aim :- To detect the Functional Group In given Unknown Organic Sample.
PHYSICAL PROPERTIES
Colour:- Colourless
State:- Liquid.
Odour:- Specific (Like Nail paint remover )
Observation Table:-

S N	EXPERIMENT	OBSERVATION	INFERENCE
1	The sample + alkaline KMnO4 solution is added drop wise to it.	Pink colour does not disappear.	Unsaturation ( Carbon-carbon double / triple bond) is not present in the sample.
2.	Sample is dissolved in water and dip blue litmus paper in it or add few drops of solution on blue litmus paper with clean dropper.	No change in colour.	– OH (Phenolic) or — COOH ( Carboxylic ) functional group is absent.
3.	The sample is dissolved in water and dip blue litmus paper in it or add few drops of solution on blue litmus paper with clean dropper.	No change in colour.	– NH2 ( Amine ) functional group is absent.
4	Small amount of the sample + 2,4 DNP solution + shake + (heat if required)	Yellow precipitate appears	Presence of carbonyl ( C=O ) group is confirmed. Means either aldehyde or Ketone may present.
5	Small amount of the sample +Tollen,s reagent + heat	Silver mirror ( surface of test tube becomes shiny due to deposition of silver on glass surface or black precipitate appear in test tube if silver is unable to form deposited itself on surface of test tube.	Presence of aldehyde ( -CHO ) functional group is confirmed.
6	Small amount of the sample +Mixture of Fehling solution A and B + heat	Red precipitate appears	Presence of aldehyde ( -CHO ) functional group is confirmed.
7	Small amount of the sample + Sodium nitropruside solution + add NaOH dropwise	Red colour appears	C=O (Ketone ) functional group is absent.