NEET UG CHEMISTRY WEIGHTAGE

Best of Luck for Your Upcoming Exam .

Here is chapter wise weightage for NEET UG chemistry. 

Invest in Our Planet

 

Invest In our Planet Earth

AJIT SINGH - CHEMISTRY EDUCATOR , TEACHER 

It is horrifying that we have to fight with our own trash/waste to protect the environment & the green planet –The Earth. For the first time in 3.8 billion years that life has existed on Earth, one species-humanity has altered the physical, biological & chemical features of the Green planet. Humans blame one & another for its alteration but no one steps up to clear the environmental issues.  Neither the policies of Government nor the citizens. Presently, the status of earth is such that people want to settle on another planet. The variety & variability of life on the earth is on extinction due to drastic climatic changes. There is an immediate need to support earth and protect the environment, for this aim to fulfill Earth Day is celebrated annually on 22^nd of April since 1970. This year 2022 –we are celebrating 52^nd anniversary of world Earth Day with Theme 2022- Invest in Our planet.

In 1969 at UNESCO conference in San Francisco , Peace activities John MCconnell proposed a day to honor the Earth and the concept of peace , to be observed on March 21, 1970, the longest day of Northern hemisphere . A month later, US Senator Gaylord Nelson proposed the idea to hold a nationwide environment teach-In on April 22, 1970. He hired a young activist, Denis Hayes to be the national coordinator. Nelson & Hayes re-named the event “Earth Day”. All this was after one of the incident –The famous 1969 Santa Barbara oil Spill, California – a well drilled by Union Oil Platform A off the coast of Santa Barbara, blew out. More than 3 million gallons of oil spewed, killing nearly about 10,000 species below sea. In reaction to this Oil Spill, protests held for regulation of environment laws or policies, Earth day.  Today, Earth day is widely recognized by more than a billion people & more than 199 countries.

A similar case witnessed in Bhopal , India popularly known as Bhopal gas Tragedy- 1984 wherein the leakage of poisonous gas (methyl Isocynate) results in death of atleast 4000 people & thousands suffering from disease or medical conditions.

Due to climatic changes – Parkland Vegetation in tropical grassland are on extinction. Everyday there is drastic diminishing of water resources, burning forests, extinction of wildlife etc. All this is because of one species- that is species of Human- with brains of self interest and no use for protection of environmental degradation.

Steps to recover & regenerate a earth includes various plans, acts, conventions /protocol from time to time and their results are slow and agenda will be covered after long run but if humans contribute then they are not so far and the dream of clean & clear environment will be soon achieved.

Theme 2022 _Invest in Our planet is contribution of each & every individual, society, district, state & country to invest in number of ways and reduce the waste burden from earth. Now, you are thinking it is monetary only , No it can be non-monetary also.  Here is the ways of contribution for an individual to invest in our planet :-

1) Take first step towards ending plastic pollution – If you use  reusable textile bag it can reduce pollution created by 600 polythene bags in just one month.  Tell the administration to ban single use plastic

2) Support organic ingredients

3) Encourage use of reusable utensils, dishes & trays

4) Use solar energy, switch off laptop/Tv/Fan & other electronic gadgets  when not in use.

5) Save & grow trees – stand against deforestation  

6) Organize a community cleanup

7) Pick up trash while you run & walk

8) Compost

9) Go pesticide free –use bio-organic pesticide

10) Eat less meat & Join awareness programs.

49( 70%) strategy for Chemistry .

 

 

PHYSICAL=  23   INORGANIC = 19     ORGANIC = 28 Marks P+I= 23+ 19=  42  ( Still one chapter from organic to cover 5 marks ) Prefer if weak in Organic P+O= 23+ 28 =   51( Skip Inorganic )       Ideal way to get what you exactly get , no deduction chance O+I= 28+ 19=   47 ( 2 marks to cover from Physical Chemistry)    Best for medical ones Now amalgamation & choosing selected portion   SET -1 = 49 Marks Strategy :- 1. Solution (1LAQ) = 5 Marks   2. P-Block ( 1 LAQ+ 1SAQ) = 5+3= 8 Marks 3. Aldehydes, Ketones & carboxylic acids :- ( VVSAQ + LAQ) = 1+5= 6Marks   4. Solid State ( SAQ + VVSAQ) = 3+1= 4 Marks 5. Chemical Kinetics = ( VSAQ+ SAQ) 2+3= 5 Marks 6. Electrochemistry = (VSAQ+ SAQ) = 2+3= 5 Marks 7. Alcohol Phenol & ethers = (VVSAQ+SAQ) 1+3= 4 Marks 8. Chemistry in everyday life =(SAQ) = 3 Marks 9. Coordination Chemistry (SAQ) 2+2= 4 Marks 10. d & f-block ( VSAQ+ SAQ) = 2+3= 5 Marks Chapters you can  SKIP :- Biomlecules , Polymers ,  Haloalkanes & Haloarenes ,  For Passing EXAM ( those who are afraid ) just Read 1. Aldehydes & ketones 2. Solutions    3. P-block  & 4. Solid state - You will pass without any tension  Contact on page to share , if any issues. we will help you to plan things as per you choice.   click here for 12 chemistry :- sample Paper

Chemistry 11 JKBOSE paper 2021

11th class chemistry paper Kashmir/ winter zone held in Dec. 2021. 

For pdf link

Chemistry Sample Paper _2022

Sample paper JKBOSE 2022 

#CHEMISTRY 

Important Questions on Alcohols, Phenols & ethers

 

Important Questions of – Alcohol , Phenols & Ether ( Chapter-11^th )           4marks

JKBOSE_ Pattern :-    2 Question = 1(VVSAQ or Fill-up or MCQ+ 3 SAQ marks)

Q1. Write the three methods of Preparation of Alcohols.

Q2. Write the three methods of Preparation of Phenols  & Ethers.

Q3. Write the three chemical properties of alcohols & ethers

Q4. Write the three chemical properties of Ethers.

Q5. How alcohol( Methanol)  reacts with –I) Na & NaOH   II) PCl3 & PCl5          III) CH3COOH

Q6. How HI reacts with following ethers : -I) CH3-O-CH3   II) Tert. dibutyl ether    III)Ethylmethylether

Q7. Write short notes on –I) Hydroboration reaction II) Reimer-Tiemann reaction   III) Williamson’s ether synthesis

Q8. Write the chemical reactions for –I) Kolbe’s reaction   II) Fermentation of carbohydrates     III) Nitration of Phenols

Q9.  Write short notes on I) Friedel Craft alkylation  reaction of Anisole   II) Friedel Craft aceylation of Phenol    III)  Halogenation of phenol

Q10. Convert the following :- I) Primary alcohol to carboxylic acid    II) Benzyl alcohol to Benzonic acid  II) Butan-2-one to butan-2-ol

Q11. Write the mechanism of hydration of ethene to yield ethanol.

Q12. Write the mechanism of conversion of ethanol to diethylether.

Q13. Give two reactions that show the acidic nature of Phenol. Compare acidity of phenol with that of ethanol

Q14.  Explain why is o-nitrophenol more acidic than O-methoxyphenol ?

Q15. Write the mechanism of dehydration of ethanol to ethene.

Q16. Give the reason for the higher boiling point of ethanol in comparison to methoxymethane & ethane .

Q17. Why O-nitrophenol is steam volatile while P-nitrophenol is less steam volatile ?

Q18. How primary , secondary & tertiary alcohols are distinguished?

Q19. What is victor Meyer & Lucas reagent test? Write chemical reactions to illustrate your answer.

Q20. Name the reagent involved in the following conversion:-

A) Ethanol   to    Ethanal      B) Propan-2-ol    to Acetone    III) But-2-en-1-ol    to   But-2-enal

Q21. Write the IUPAC & chemical structure of  –I) Picric acid    II) Anisole    III) 2-Ethoxy -3-methylpentane

Q22. Write short notes on –I)  Oxymercuration-demercuration        II) Coupling reaction

Q23. Arrange the following compounds in order of their increasing boiling points :-

Pentanol , butanol , Butan-2-ol   , ethanol , Propanol & methanol

Q24. Illustrate with examples the limitations of williamson’s synthesis for the preparation of certain types of ethers.

Q25. How RMgX reacts with carbonyl compounds to give all types of alcohols?

Questions carrying 1 Mark

Q1. Phenols are also called as ………….

Q2. PCC is ----

Q3. Jones reagent consists of -------

Q4. The structure of PDC is --------

Q5. What is denatured alcohol?

Q6. How phenols are prepared from benzenediazonium chlorides?

Q7. Write chemical names of I) Catechol  II) Resorcinol

Q8. What is formed by oxidation of phenols with Pot. Dichromate /sulphuric acid ?

Q9. How phenol is converted into Benzene ?

Q10. How salicylic acid is formed from Phenol ?

Q11. Name the reagent used in bromination of phenol to 2,4,6-tribromophenol

Q12. Write IUPAC  name & chemical structure  of I) Glycerol    II) Isopropylalcohol

Q13.  What is Lucas reagent ?

Q14. Phenols &  aromatic ethers are o/p directing . ( True/false)

Q15. How salicylic acid reacts with Methanol ?

IMPORTANT Questions on Haloalkanes & Haloarenes

 

IMPORTANT QUESTIONS OF CHEMISTRY _CHAPTER_WISE   #ORGANIC

Chapter – Haloalkanes & Haloarenes                                                                                                      4 Marks

( JKBOSE-   2 Marks Questions *2 Questions ) – IMPORTANT QUESTIONS ARE HIGHLIGHTED

DIRECT QUESTIONS:-

Q1. Write two methods of preparation of haloalkanes & Haloarenes.

Q2. Write two chemical properties of haloalkanes & haloarenes .

Q3. Write short notes on :- I) Finkelstein Reaction & II) Swartz Reaction

Q4. Write chemical reactions for I) Groove’s Process  & II) Deacon Process

Q5. Write short notes on I) Electrophilic Substitution reaction    II) Nucleophilic reactions

Q6. What products are formed when haloalalkanes reacts with  Na  & Zn metals ( **Wurtz & Frankland reaction )

Q7. Write short notes on I) Fittig Reaction      II) Wurtz-Fittig reaction

Q8. Write short notes on I) Ulmann reaction    II) Formation of RMgx From RX

Q10. Write Preparation & Properties of I) DDT     II) Chloroform

Q11. Write short notes on-  I) Holoform reaction     II) Freons

Q12. Write mechanism of SN1 & SN2 reaction in Haloalkanes.

Q13. What are ambident Nucleophiles. Explain with two examples.

Q15. Give the uses of Freon 12, DDT, CCl4 & CHI3.

Q16. How you can prepare I) Westron ( CHCl2CHCl2)    &      II) Westrosol ( CHCl= CCl2). Also write their IUPAC names.

Q17. Write a short note on –I) Satyzeff rule     II) Dow’s Process

Q18. Write short notes on _) Retention of Configuration    II) Inversion of Configuration

Q19. Prepare the following –I) Phosgene from Chloroform    II) DDT from chlorobenzene & Chloral

Q20. Why aromatic nucleophilic substitution reactions are not possible in haloarenes?  If they do so only then in drastic consitions.

REASONING QUESTIONS :-

Q1. Explain why the dipole moment of chlorobenzene is lower than that of cyclohexylchloride ?

Q2. Write the mechanism of :- nBuBr + KCN  + (Et-OH-H2O)   à n BuCN

Q3. Explain why RX , though polar , are immiscible with water ?

Q4. Explain why RMgX should be prepared under anhydrous conditions?

Q5. Explain why But-2-ene is more stable product of elimination reaction of 2-chlorobutane with Alc. KOH ?

Q6. Which one the following has the highest dipole moment ? Explain Why?

A) CH2Cl2 B) CHCl3   C) CCl4

Q7. Which compound in each of the following pairs will react faster in SN2 reaction with OH- & why?

A) CH3Br or CH3I     B) (CH3)3C-Cl or (CH3)2CH-Cl      C) CH3-CH(CH3)- CH2CH2-Br Or CH3CH2CH(CH3)-CH2-Br       D)  C6H11-CH2-Cl Or   C2H11-Cl

Q8. Why Iodobutane is SN2 faster than Chlorobutane .

Q9. Haloalkanes react with KCN to form RCN as main product while AgCN forms RNC as main product . Explain

Q10. Haloalkanes react with Aq. KOH forms Alcohols while reacts with Alc. KOH forms alkenes. Explain

Q11. Arrange the following compounds in order  of their increasing B.pts:-

I)  Bromomethane, Bromoform , Chloromethane, Dibromomethane

II) 1-chloropropane , Isopropyl chloride, 1-chlorobutane

Q12. P-Isomer of dichlorobenzene has highest melting & boiling point as compared to O - & m- isomer of dichlorobenzne. Explain why ?

Q13. Why Sulphuric acid not used during the reaction of alcohols with KI?

Q14. Identify the isomer of alkane  with MF- C5H12 that one photochemical chlorination yields I)  A single monochloride    II) Four isomeric monochlorides

Q15. Although Cl is an EWG , yet it is O/p- directing in ArSE reactions. Why?

Q16. Primary alkyl halide C₄H₉Br (a) reacted with alcoholic KOH to give compound (b).Compound (b) is reacted with HBr to give (c) which is an isomer of (a). When (a) is reacted with sodium metal it gives compound (d), C₈H₁₈ which is different from the compound formed when n-butyl bromide is reacted with sodium. Give the structural formula of (a) and write the equations for all the reactions.

Q17. Out of C6H5CH2Cl and C6H5CHClC6H5, which is more easily hydrolysed by aq.KOH ?

Q18. Predict all the alkenes that would be formed by dehydrohalogenation of following halides with EtONa in EtOH & identify the major alkene-  I) 2-chloro-2-methylbutane II) 2,2,3-trimethyl-3-bromopentane    (HINT – use -Satyzeff rule)

Q19. Write the equations for the preparation of 1-Iodobutane from –I) Butanol      II) Butene

Q20. Why does NO2 group show its effect only at Ortho & Para- positions & not at meta  position of Chlorobenzene?