CHEMISTRY QUESTIONS DISCUSSED IN THE WORKSHOP
1. Chapter - Haloalkanes and Haloarenes
The book Silent Spring by Carson outlines the danger of DDT to both humans and
environment and opposed the use of DDT persticide that came into use in Worldwar II and
was banned in USA in 1972. After that, an anti DDT campaign eventually spread to other
countries, including developing nations like India, where the pesticide was being used to kill
mosquitoes as it is the cheapest insecticide. Some farmers are still using DDT.
Contextual Question:
a. As a student of chemistry would you promote the use of DDT or not? Justify
(1)
b. Give the structural formula and IUPAC name of DDT.
(1)
Value based question:
What are the values associated with the above decisions?(any two values)
(1)
Value Point:
(1) Environment sensitivity
(2) Awareness of harmful effect of DDT
Sarita Knokar
Seth Anandram Jaipuria School Vasundhara
9911404512 - sarita.khokhar@yahoo.com
___________________________________________________________________________
2. Chapter - Electrochemistry
Production of electricity by thermal plants is not a very efficient method because it requires fossil
fuels and create pollution also. In such situations, some alternative like fuel cell can be a better
option to produce electricity, because it is renewable and non- polluting source of energy.
3
Contextual Question:
Suggest two materials other than hydrogen that can be used as fuel in fuel cells.
1
Value based question:
What is your opinion about hydrogen economy? Give any two relevant points.
Value points:
1) Environmental sensitivity
2) Concerned about nature- judicious use of natural resources.
2
__________________________________________________________________________________
CHEMISTRY - Question Bank
1. Solutions:
Rahul is fond of eating boiled eggs in Breakfast but he needs to leave for his work early at 6
am. Sometimes in hurry, the eggs he boils are only half boiled due to shortage of time and
he has to eat outside and suffers from health problems. His mother tells him that he must
avoid eating outside and to cook faster he can add a little amount of salt while boiling eggs.
Contextual Question:
How do you justify quick cooking by adding salt?
1
State another example where the same property is used to benefit humans
1
Value based question:
State two values his mother is trying to teach Rahul?
1
Ans. Addition of salt in water elevates the boiling point of water therefore the solution will
attain higher temperature and cook faster.
Value point: self sufficiency, time management, saving money, concern for health.
Ruchita Dhingra
Uttam School For Girls, Gzb.
___________________________________________________________________________
2. Alkyl Halides:
Bhola Ram, a farmer in a remote village supplies vegetable in a nearby town. To have better
production of crops, he had been using some chemicals. To give them cleaner and fresh
appearance, he got the vegetables washed in a stream before loading in the trucks. It
definitely impressed the wholesalers and Bhola Ram also earned good money but the fish in
the stream reduced in number.
Contextual Question:
What could be the possible cause of death of fish? What alternative should be given to the
farmer so as to keep up his income but not harm the aquatic life?
Value based question:
What value does Bhola Ram imbibe?
3
Ans. He must have been using pesticides like DDT which kill the aquatic life. In its place the
biodegradable pesticides must be used.
2
Value Point: Environmental Sensitivity, awareness of harmful effects of chemicals
1
Ruchita Dhingra
Uttam School For Girls, Gzb.
3. Alcohols, Phenols and Ethers
A helper in Chemistry lab was an alcohol abuser. Once he was tempted to steal some alcohol
supplied in laboratory but his other friend warned him that the sample was not fit for
drinking. Moreover he could be caught and jailed for his act of stealing.
Contextual Question:
Which chemical is generally mixed and why? What are the consequences of consuming such
alcohol?
2
Value based question:
Name the value that the friend is trying to teach.
1
Ans. Ethanol is an intoxicating substance. To avoid the misuse of ethanol, a small quantity of
Methanol is mixed with it.
Methanol is poisonous.
Its consumption can lead to blindness and even sometimes death.
Value point: Honesty, concern for own health
Ruchita Dhingra
Uttam School For Girls, Gzb.
___________________________________________________________________________
4. The book ‘Silent Spring’ by Carson outlines the danger of DDT on both humans and
environment and oppose the use of DDT pesticide that came into use in World War II and
was banned in USA in 1972. After that an anti DDT campaign eventually spread to other
countries including developing nations, where the pesticides was being used to kill
mosquitos as it is the cheapest insecticide but farmers are still using DDT.
3
Contextual Question:
(i)
As a student of chemistry would you promote the use of DDT or not? Justify.
1
(ii)
Give the structural formula and IUPAC name of DDT.
1
Value based question:
(iii)
Name two values associated with the above decision?
Value Point: Environmental Sensitivity, awareness of harmful effects of DDT,
application of theoretical knowledge into daily life.
1
Sarita Khokar
Seth Anandram Jaipuria, Vasundhara
___________________________________________________________________________
5. p-block elements
A gas which is pale blue has a characteristic odour and harmless in low concentration. The
oxides emitted from exhaust system of super sonic jet aeroplanes reduces the concentration
of this gaseous layer in upper atmosphere. In the light of the above account, answer the
following questions:
Contextual Question:
(i) Human activities imposing threats to this layer
2
Value based question:
(ii) Write two values associated with the safety of this gaseous layer.
1
Ans. (i) The gas is ozone. Use of freons in aerosols, and refrigerators and ACs destroy this
layer so their use dhould be minimised.
(ii) Environmental Sensitivity,
Awareness, Concern.
Monika Singh, KDB
6. Co-ordination Compounds
Haemoglobin, the red pigment of blood which acts as oxygen carrier is a coordination
compound of iron. CO has 300 times more capacity than O2 to bind with it. A traffic
policeman who works for 8 hours to control traffic is provided with a gas mask.
Contextual Question:
(a) Write the name of the compound which forms when CO binds with Hb.
1
Value based question:
(b) what are the values associated with the decision of providing mask?
2
Ans. Concern for health, Scientific Knowledge.
___________________________________________________________________________
7. General Principles and Process for Isolation of Elements
At a site low grade Cu ores are available and zinc and iron scraps are also available.
Contextual Question:
(a) Which of the two available scraps would be more suitable for reducing the leached Cu
ore?
1
Value based question:
(b) List any two values associated with your decision.
2
Ans. Values Economic concern, scientific knowledge.
Anjali Sharma,
Kothari International, Noida
___________________________________________________________________________
8. General Principles and Processes of Isolation of Elements:
Sunita is very fond of wearing gold. Her teacher explained to her that gold is obtained by a
metallurgical process where the metal is treated with a dilute solution of KCN in presence of
O2 from which the metal is later obtained by replacement. She also told Sunita that the use of
these methods must be minimised.
Contextual Question:
(a) Write the equations involved in the above process
(2)
Value based question:
(b) Outline any two values that the teacher wants Sunita to understand
(1)
Value Points –
1.
2.
3.
4.
Conservation of Natural Resources.
Responsibility towards the environment
Awareness
Sensitivity towards environment
Upasana
Cambridge school, Indirapuram 9811545120
________________________________________________________________________
Unit 14 – Biomolecules
9. Ram is unable to see in darkness from past one week. His mother took him to a doctor.
The doctor diagnosed him with lack of Vitamin A and explained that vitamins are
important for proper functioning of our body.
Contextual Question:
Which two deficiency diseases Ram could possibly be suffering from? Name any two fat
soluble vitamins.
(1+1)
Value based question:
Dr. has suggested Ram a balanced diet. Indicate any two values in the suggestion given
by the doctor.
1
Value Points:
1. Awareness
2. Concern for humans
Ajay Verma
DPS Indirapuram
9811000761
___________________________________________________________________________
10. In a city where there are more cars than houses and the traffic moves bumper to bumper on the
roads, you can imagine the state of the environment. Lead is a major pollutant in alarming
concentrations. Mauli was passing through the market unable to breathe, thought to come up with a
device or alternative to reduce lead content.
Lead creates cancer and poisoning etc
Contextual Question:
i)
Which chemical is used for the treatment of lead poisoning? Write its chemical formula.
(2)
Value based question:
ii)
State what are the two values shown by Mauli.
( 0.5 + 0.5)
Ans. i) EDTA Ethylene diamine tetra acetate
ii)
Sense of responsibility, Eco friendly, environmental awareness, health consciousness
Dr. Anupam Kulshreshtha
AKULSHRESHTHA21@yahoo.co.in
DLF Public School
9810513570
___________________________________________________________________________
11. Surface Chemistry
The enzyme catalysed reaction may be considered to proceed in two steps
Step 1- E+S
ES*
Step 2- Es*
E+P
Contextual Question:
(2)
Sometimes even in the presence of a catalyst the rate of a reaction remains the same. Give reason
Value based question:
What moral value in your opinion is conveyed by the above topic?
(1)
Value based points
1) Compatibility
2) Unity
3) Mutual cooperation
Santosh Talwar
DAVCP school
Chander Nagar Ghaziabad
2796833
___________________________________________________________________________
12. Surface chemistry
The selectivity of a catalyst is its ability to direct a reaction to yield a particular product. Using
different catalyst we get different products.
Contextual Question:
Q. Give examples to verify one of the important features i.e selectivity of a solid catalyst
2
Value based question:
Q. What ethical value can be conveyed by the above topic
1
Value points
1) Mutual cooperation but along with the choice of requirement
2) Recognition of the right thing
3) Versatile nature
4) Acceptance but according to our need
___________________________________________________________________________
13. Aldehydes, Ketones and Carboxylic Acids
In the preparation and properties of Aldehydes and Ketones , most of the compounds found
use in a number of eatables and perfumeries. Ice-creams have aldehyde compounds. Many of
these components are obtained from plants which give pleasant smell.
Contextual Question:
1. Name the aldehyde and ketone which are obtained from plants. Name the plant and
the component.
(1+1)
2. What is the knowledge you get from above components.
1
Value points
1. Knowledge
2. Awareness
3. Use of natural resources than synthetic one
4. Resourceful
Ruchi Vats
9871764330
Ghaziabad Public
School
14. There is growing interest in the use of Chilate therapy in medical chemistry. As we see
EDTA is used in the treatment of lead poisoning.
Contextual Question:
1. What is Chelation? Give one more example.
2. What values are attached with it.
Value based question:
1. Scientific approach
2. Concern towards others
Usha Kalra
Gurukul – The
School
___________________________________________________________________________
15. Shyam works as a painter to earn his living. His visibility is getting poor day by day. He
visited a doctor who diagnosed him with methanol poisoning and suggested him to
discontinue with his work as a painter.
Contextual Question:
a. Write the common name of methanol.
b. Why is it called so?
c. Write the equation involved in its preparation.
(1/2)
(1/2)
(1)
Value based question:
a. Outline any two values that the doctor wants him to understand.
Value points
 Awareness
 Concern for health and environment
 Sensitivity towards health and environment.
Upasana
Cambridge School
9811545120