CBSE Class 12 Chemistry - Haloalkanes and haloarenes VBQs Based on CBSE and NCERT guidelines. Value based questions are now being given in exams to promote morals and values in students, Students should read and understand the following VBQs to get better understanding and score good marks in exams
Haloalkanes and haloarenes
1. Ravi is a student of class VI fell down and got hurt Sam is a boy class XII immediately took him to the doctor and the doctor dressed the wound with the halogen compound.
(i) What is the name and formula of the compounds?
(ii) Write any one method of preparation.
(iii)What values can you find in Ravi?
Ans: 1 i.iodoform,CHI3
iii. Ravi is alert ,helping and kind in nature.
2. We all know that Freon 12 is used as refrigerant and it caused ozone layer depletion.
(i) What are the other gases cause ozone layer depletion?
(ii) How can you save your environment?
(iii)Give one more use of freons.
ii. by using public vehicle, and filtering fumes from factories
iii. used as propellant
3.Sam find a man putting his handkerchief on the face of a lady and she fainted. Sam immediately called for help and the other man ran away and took her to the hospital.
(i) What values can you find in Sam?
(ii)Can you give one use of chloroform?
(iii) Chloroform should be filled bottle up to the brim in brown bottle. Why?
Ans:3 i. Sam is alert ,helping and has general awareness.
ii. used as anaesthetic.
iii. Chloroform will react with oxygen and form poisonous gas phosgene.
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