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?

Chemistry New Exam Pattern CBSE/Syllabus21_22

Note :- only for chemistry 12th class CBSE 

Pattern of Exam 

Phases of Exam :- 2 (Term 1 & Term 2)

Marks = 35 +35= 70 ( Phase wise)

Practical Marks = 15 + 15 = 30 ( Phase Wise)

Pattern of paper :- 

1. Question paper contains three sections. All are MCQ's based, provide with internal choice. All questions are carrying equal marks ( 1 Mark for each Question) 

2.Section A has 25 questions. Attempt any 20 questions.In case student attempt more questions then first 20 will be counted 

3. Section B has again 25 questions. Attempt any 20 questions. Same as section A 

4. Section C has 6 questions. Attempt any 5 questions. 

CBSE has released sample of Term 1, you can visit cbse site for other subjects, here I am providing you all info about chemistry. Same pattern will be followed for Term 2. 

First of all we need to know about changes in syllabus. Syllabus is same, the only change is that Syllabus for term 1 & term 2 contains sets of chapter as given below

Term 1 -Syllabus / Blue Print 

Physical Chemistry = 10 Marks 

Solid state & Solution

Inorganic chemistry = 10 Marks 

P-block elements (15-18 groups )

Organic Chemistry= 15 Marks

Haloalkanes & Haloarenes + Alcohol, phenol & Ethers. 

Total marks = 35 

Practical Marks = 15  (distribution is given below) 

[Titration = 4

 Salt Analysis= 4

 Content based experiment= 2 

Viva & Practical record = 5]

Now look at Sample paper of Term 1 as released by CBSE. 

syllabus for Term 2.

Physical Chemistry= 13 Marks 

 Electro chemistry, chemical kinetics & Surface chemistry 

Inorganic chemistry = 9 Marks

d& f block + coordination chemistry 

Organic Chemistry= 13 Marks 

Aldehydes, ketones & Carboxylic acids + Biomolecules. 

Practical = 15 Marks 

Titration = 4

Salt Analysis= 4

Content based =2 

Project & Viva = 05 

The sample paper of Term 2 will be uploaded soon, note that pattern is same as sample of term 1. 

Visit for new updates :- 

AJIT CHEMISTRY keeps you updated

Note :- Polymer, chemistry in Everyday,  Metallurgy are deleted from syllabus. 

Alcohols, Phenols & Ethers

Test series for NEET 

1. Alcohols, phenols & Ethers

solid State (MCQ's)

    1. Which of the following is not feature of Crystalline solids?

A. Have sharp M.pt

B. Have anisotropic nature

C. Show isotropy

D. Have a long-range orderly arrangement

2. The Percentage of free space per unit cell in Primitive, FCC & BCC respectively is

A. 47.6%, 32% & 26%

B. 47.6%, 28%, 32%

C. 47.6%, 26% & 32%

D. NOTA

3. Edge length ratio of BCC to FCC is ------

4. Which of the following is correct about Orthogonal Crystal ?

A. Has 4 Bravais lattices

B. BaSO4, KNo3, K2SO4

C. α=β=γ=90^O

D. All of the above

5. Coordination Number of NaCl, CsCl, ZnS, CaF2, Na2O are

A. 6:6, 8:8, 4:4, 8:4, 4:8

B. 6:6, 8:8, 4:4, 8:8, 4:4

C. Reverse of Option A

D. Reverse of Option B

6. Which of the following is correct about Voids size :-

A. Oct. Void = 0.414 X r

B. 0.225 X r = Tet. Void

C. Tri. Void= 0.115 X r

D. All of the above

7. The percentage efficiency of 2D- SCP & HCP is :-

A 52.4%, 74%              B. 47.6 % & 36 %

C. 47.6 % & 26%         D. 52.4% & 60.4%

8. What of the following is incorrect about some of ionic crystals

A. NaCl has 4:4 Coordination number

B. Flourite structure(CaF2, BaCl2, SrF2) has 8:4 Coordination number

c. Antiflourite ( Na2O, Li2O) has 4:8 Coordination number

D. Spinel has a Bivalent & Trivalent cation , Bivalent occupies 1/8 th tet. Voids while Oxide ions Occupies CCp . Trivalent occupies ½ of Oct. Voids. Ex ZnFe2O4

9.Which  of the following is not a spinel

A. MgFe2O4

B. ZnFe2O4

C. AlFe2O4

D. NaFe2O4

10. Schottky defect is characterized  by

A. Equal number of cation &  anion loss

B. Occurs in ionic compounds with Higher C.No. & having size of ions almost equal

C. Decreases the density of crystal

D. A type of vacancy defect that occurs In NaCl, CsCl, KCl , KBr & AgBr etc

E. All of the above

11. Greater the F-Centres, ----will be the intensity of Colour

A. Greater

B. Lesser

C. Can’t be predicted

D. Nothing to do with colour intensity

12. The Crystal that exhibit both Schottky & Frenkel defect

A. AgBr             B. AgCl

C. AgI                D. CsCl

13. superconductivity is all about :-

A. When substances offers zero resistance

B. Kammerlingh Onnes observed this phenomenon at 4K in Hg.

C. YBa2Cu3O7, Nb3Ge alloy, La1.25Ba0.15CuO4, (TMTSF)2 PF6 ( Tetra methyl tetra selena fulvalene )

Exhibit superconductivity 

D. All of the above

14. Solids that have net zero magnetic moment:-

A. Diamagnetic & antiferromagnetic substances

B. Paramagnetic & Ferromagnetic substances

C. Ferrimagnetic & Antiferromagnetic substances

D. Only Diamagnetic substances

15. The ferro, ferri & anti-ferro magnetic substances changes into Paramagnetic solids at a particular temperature called as Curie temperature, this is because of alignment of spins in one direction .Fe3O4( Ferrimagnetic) gets converted to paramagnetic at

A. 850K       B. 890 K     C. 900K       D. NOTA

16. Bethollides are :-

A. Non-stoichimetric solids having metal deficiency defect like Ni0.98 O

B. Stoichimetric solids with no defect

C. Solids that acts like pseudo gold

D. NOTA

 

17.  A unit cell of NaCl has four formula units. The edge length of the unit cell is 0.564 nm . What is the density of NaCl

A. 2.16 g/ml                   B. 2.16 kg/l  

C. 2.16 kg/ml                 D. NOTA

18. The diffraction of Barium with X-radiation of wavelength 2.29 A⁰ gives a first order reflection at 30^o. What is the distance between diffracted planes

A. 2.29 A⁰       B) 1.29A⁰       C) 4.19 A⁰      D) NOTA

19. A metal crystallizes into two cubic phases FCC & BCC whose unit cell lengths are 3.5 & 3 A^O respectively. Calculate the ratio of densities of FCC & BCC

A. 1.259/1   B. 1.315/2   C. 1.315/1   D. 1.328/2

20. Inverse spinel structure are

A. Just opposite in occupancy wrt normal spinel

B. have M2+ ions occupy at Oct. Voids while M3+ equally occupy Tet. & Oct. voids

C. Fe3O4 is inverse spinel

D. All of the above

21. The edge length of BCC unit cell is 390pm . If the cation radius is 150pm then the radius of anion is

A. 187.7 pm   B. 197.7 Pm   C. 170.9 pm D. 1.84.7 pm

22. The effective radius of an iron atom is 1.42 A⁰. It has a rock salt structure. calculate its density ( Fe=56)

A. 5.8g/ml      B. 6.8g/ml     C. 7.8g/ml   D. 4.8g/ml

23. A close packing structure of uniform spheres has the cell edge = 0.8 mm. Find the radius of molecules of it has A) SCC lattice B) FCC lattice & C) BCC lattice respt.

A. 0.4 mm, 0.2828mm &  0.3464mm

B. 0.4mm, 0.4364mm, 0.2828mm

C. 0.44mm, 0.2626mm, 0.3434mm

D. NOTA

24. The most unstable & unsymmetrical crystal system is

A. orthorhombic crystal

B. Triclinic crystal

C. Monoclinic crystal

D. NOTA

25. The most stable & symmetrical crystal system is

A. triclinic                       B. Cubic

C. Orthorhombic           D. Hexagonal

 

26. Intrinsic semiconductors are :-

A. Pure Ge & Si

B. P & n- type Semi conductors

C. Both A & B                 D. NOTA

27. n-type SC is observed when

A. When P is doped in Si

B. When Al is doped in Si

C. When both P & Al are doped in Si & Ge

D. NOTA

28. CCP has ---fold symmetry & HCP has ---fold of symmetry  

A. plane of Symmetry

B. 2 fold symmetry & 3 fold symmetry

C. 3 fold symmetry  &  6 fold symmetry

D. NOTA

29. The Coordination number & Packing efficiency of HCP( ABAB…type ) & CCP( ABCABC..) type of 3D crystal

A. 12 & 74 %                   B. 6 & 60.4%

C. 12 & 60.4%                 D NOTA

30. Radius ratio is ratio of radius of

A. cation to anion ‘

B. anion to cation

C. radius of both to cation

D. radius of any to sum of both

31.  The contribution of an atom per unit cell A) at corner of Hexagonal & B) Side of hexagonal is respt.

A. 1/6 & ½                    B. ½& 1/6

C. ¼ & 1                         D. 1/6 & 1/6

32. In a closed packed array of N spheres , the number of tetrahedral holes are

A. N        B. 2N         C. N/2       D. N/4

33. In a solid AB having NaCl structre, A atoms occupy the corners of the cubic unit cell. If all the face centered atoms along one of the axes are removed , then the resultant formula is

A. A3B4    B. A3B2    C. A3B3   D. A3B5

34. The Bragg’s equation is mathematically

A. nλ = 2dSinφ

B. nλ= dsin O

C. nλ= 2dtan φ

D. E= hv

 

 

 

 

 

 

 

 

 

 

 

 

 

Geochemist2021 Paper 1 (Memory Based)

#Geochemist 2021 held  Feb. 2021. 

Paper 1 

1. National Youth Parliament Festival age group 18 to 25 years 

2. Mafluzat literature ?? 

3. Montreal protocol retifies reduction of cfc's

4. Art. 243D Reservation of seats -SC,ST 

5. Very strong Air currents in Upper air westerly are known as Jet Streams 

6. Lahore session 1929 famous for Purna  Sawaraj 

7. Who appoints Attorney General for State President of India 

8. Tendons connects Muscle to Bone 

9. Decade of 2021-30 is declared by UN as 

10. CMD of Serum Institute of India private limited Cyrus S. Poonawalla 

11. Ayushman Bharat ....(Try Yourself) 

12. Zaffron is cultivated on which type of soil Karewas 

13. Inaugural edition of Sea Vigil Year January 2019

14. Classical example of entrepot ?? 

15. Self respect movement started by Ramaswamy (K/a Periyar by His followers) 

16. Kayakalp  awards given annually by ministry of Ministry of Health & Family welfare  launched in May 2015 

17. Which committee on PRI recommend a 2 Tier  system by removing  block level bodies ...(Try Yourself) 

18. James Prinsep  famous for Deciphering Historical seals 

19. Tamilakam consists of TN, Kerala , Puducherry , Lakshwadeep  & AP & Karnataka 

20. Headquarters of East Central Railways of India Hajipur 

21. Mango shower Kerala , karnataka,  Korean, Goa 

22. PM SYM (Try urself )

23. Ozone Hole (Try urself)

24. Pulikulam  is an indigenous bread of Bulls used in Jallikattu 

25. Headquarters of Coal India limited (CIL)  a Maharatna Kolkata 

26. Tincture of Iodine is 2-7%  of Elemental iodine dissolved in Ethanol & water 

27. Marajo Island is located in Brazil 🇧🇷

28. India First pollinators parks Haldwani Uttarakhand 

29. Ultrasonic wave frequency 2OK Hertz above 

30. Web Ratna Awards old name Digital India Awards.....awarded by MeitY

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