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| ALL Past Questions TOPIC WISE For The Last 10-12 years |
| Topic 15: Aldehydes And Ketones |
Fill in the blanks choosing appropriate words given in brackets:
[greater, lesser, condensation, addition, inductive effect, mesomeric effect, no a-hydrogen atom, 1a
hydrogen atom, 2a-hydrogen atoms, ferrous sulphate, copper sulphate, iodine, amino acids,
nucleic acids, toluene, benzene, nitrobenzene, Friedel Craft's, Cannizaro's Liebermann, violet,
blue, green]
Benzaldehyde undergoes ............... reaction on treatment with concentrated sodium hydroxide
because it has _____. |
Marks [1] |
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2001 |
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| What is Cannizzaro's reaction? Name a compound which undergoes this reaction.
Name the products formed when this compound undergoes the reaction. |
Marks [3] |
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2000 |
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Choose the correct alternative:
Acetaldehyde on treatment with hydrogen cyanide followed by hydrolysis gives:
a) Formic acid b) Acetic acid c) Lactic acid d) Tartaric acid |
Marks [1] |
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1999 |
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Fill in the blanks choosing words from the following:
[equilibrium, spontaneous, positive, negative, zero, one, resonance stabilization, inductive effect, common ion effect, buffer action, salt hydrolysis, yellow, white, violet, acidic, basic, acetaldehyde, formaldehyde, benzaldehyde]
A __________ precipitate is obtained on adding iodine and sodium hydroxide to ____________. |
Marks [2] |
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1999 |
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Give the balanced equation for the following reaction. Name the product formed.
Acetone reduced with magnesium amalgam in neutral medium. |
Marks [1] |
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1998 |
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| What is Fehling's solution? What happens when acetone is treated with
Fehling's solution? |
Marks [2] |
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1996 |
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Fill in the blank choosing word from the following:
[minerals, aldehydes, isotopes, allotropes, ketones, molecularity, isobars,
dependent, ores, independent, acids, orders.]
Organic compounds having a carbonyl group and a hydrogen atom attached to
the carbonyl carbon atom are known as .................... |
Marks [1] |
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1995 |
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Name the following reactions and write balanced equations:
(i) Acetaldehyde with dilute sodium hydroxide.
(ii) Benzaldehyde with concentrated sodium hydroxide. |
Marks [3] |
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2002 |
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What is the product obtained when formaldehyde is treated with ammonia
Mention one of its uses. Give the balanced equation for the reaction. |
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Write the balanced equations for the reaction of ammonia with formaldehyde,
acetaldehyde and acetone. |
Marks [3] |
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2001 |
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Write chemical equations for the following reactions and name the reactants and products:
(i) Formaldehyde with ammonia
(ii) Acetone with sodium hypoiodite |
Marks [2] |
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2005 |
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| Topics Covered |
1. |
Relative Molecular Mass and Mole |
2. |
Nuclear and Radiochemistry |
3. |
Chemical Bonding |
4. |
Matter: Structure and Properties : Solid State |
5. |
Phase Equilibria |
6. |
Chemical Kinetics |
7. |
Ionic Equilibria |
8. |
Electrochemistry |
9. |
Chemical Energetics |
10. |
Extraction, Properties and Uses of Metals |
11. |
Isolation, Manufacture, Properties and Uses of Non-Metals |
12. |
Preparation, Manufacture, Properties and Uses of Compounds |
13. |
Types of Chemical Reactions, their Mechanisms and Organometallics |
14. |
Ethers |
15. |
Aldehydes and Ketones |
16. |
Carboxylic Acids |
17. |
Acid Derivatives |
18. |
Glycine |
19. |
Organic Compounds containing Nitrogen |
20. |
Carbohydrates |
21. |
Aromatic Compounds (Benzene and its Derivatives) |
22. |
Polymers |
23. |
Isomerism |
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| Advantages |
1. |
Topicwise presentation of all past questions allows topicwise revision. Past questions are
the most important questions you must solve first. |
2. |
Frequency analysis shows types of past questions with marks, year reference and
whether choice or compulsory, short or long. |
3. |
Eliminates questions on topics not part of a forthcoming Board Exam. |
4. |
Adds model questions for new topics in a forthcoming Board Exam. |
5. |
Data is presented from the most recent to earlier years, covering 10-12 years. |
6. |
Perfect for making strategy and for the prioritization of study objectives. |
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| Solutions To All Past Questions |
| Topic 15:
Aldehydes And Ketones |
Question |
Solution |
|
Tips |
Give two tests to distinguish between:
Acetaldehyde and acetone. |
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[1] Choice in 2003 |
|
i |
With Tollen's reagent: Acetaldehyde gives silver mirror. Acetone does not give this test. |
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| These two tests i.e., Tollen's test and Fehling's test are the specific tests for the aldehydic group. |
| Since, acetaldehyde contains one aldehydic group it gives positive result with the above two test whereas acetone does not because it contains ketonic group as the functional group. |
|
1. |
Observation must be stated with the help of which the sample can be identified in such questions, for example, red precipitate or silver mirror is formed. |
2. |
Difference in properties of aldehydes with and without a-hydrogen atoms must be emphasised. |
| 3. |
Main things to be prepared in Organic Chemistry are: |
i |
Named reactions |
ii |
Conversions and |
iii |
Differentiating chemical tests of compounds. |
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| Advantages Solutions To All Past Questions |
• |
They Allow Self Check. |
• |
They Guide As To How And How Much To Write In The Board Exam. |
• |
Learn Backwards From Answers. |
• |
Learn How To Answer In A Board Exam. |
• |
Tips And Formulae To Memorize. |
• |
Last Minute Help: Gain Marks Even While You Sit And Read In Bed! |
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| Revision Notes |
• |
Revision Notes On What Has Already
Come In The Last 10-12 Years Are Helpful
Throughout The Year, Just Before Examinations,
Or Even The Night Before Exam. They Provide
A Quick Synopsis Of Solutions And Tips On Each Topic. |
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| Topic 22: Polymers |
Questions |
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| What type of polymer is polyethylene? |
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[1]
Choice in 1998 |
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| Polyethylene is synthetic addition polymer of ethylene |
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| Addition polymers are formed by the combination of alkene monomers to produce a single huge molecule only. Polyethylene is made by repeated addition of ethylene monomers |
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| Important subtopics of this chapter are: |
i |
Monomers of addition and condensation polymers. |
ii |
Difference between thermosetting and thermoplastic polymers. |
|
Tick:How Do You Find
This Topic? |
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| Advantages |
• |
No Need To Make Separate Extensive Revision Notes. |
• |
Especially Excellent For Last Minute Revision. |
• |
Use Your Short-Term Memory To Boost Results By Reviewing These Notes The Night Before Exam, When Your Mind Is The Keenest! |
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| Prioritize Using
Smart Study Plan Interpretation |
• |
On Topic 22: Polymers, there have been
twenty two past questions in the last 13 years. |
• |
They came in the years 2007, 2006, 2005, 2004, 2003, 2001,
2000, 1999, 1998, 1997, 1996 and 1995. |
• |
Whether they were Compulsory or Choice questions
is indicated by C or NC. |
• |
For example, the 2005 question was worth one mark
and was Compulsory. |
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Suggested time to attempt all these 22 questions on your own is 88 minutes. |
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| Frequency Analysis And Planning Chart |
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| Advantages |
• |
Find Out Which Past Questions Were Difficult For You
By Filling Out Each Circle According
To How Difficult You Found A Question. |
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• |
Study According To Your Personal Strengths. |
• |
Save Time By Planning Better. |
• |
Revise These Questions For A Second Time To Maximize Marks. |
• |
Have A Thorough Knowledge Of What Has Already Come In The Last
13 Years On Each Topic. |
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| Remember |
Going Over Past Questions Gives You More
Confidence. Solutions To Every Past Question
As Per Board Guidelines Ensure
You Gain Every Possible Mark. |
These Are The Most
Important Hours
You Will Spend Towards Preparation Of
Your Board Exam. |
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| Extras |
• |
How To Work Smart: 10 Keys To Success By Dr Sunita Gandhi. |
• |
Nutritional Guidelines By Dr Amitabh Pandit, A Well Known Naturopath. |
• |
Cd–Includes Ten Keys Of Dr Gandhi As Explained By The Students Of
City Montessori School (Cms), Lucknow, Up And Testimonies
of Students Who Have Used The Sure Success Series. |
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| Please Note |
• |
Questions And Topics Not Relevant To A Future Board Exam Are
Not Included. |
• |
New Model Questions Are Added Whenever A New Topic Has Been
Included By The Council For A Forthcoming Board Exam. |
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