Chemistry | Grade 12-XII | Question Paper 2076 [2019] | Sub. Code: 212C | NEB

chemistry grade 12-xii question paper 2076-2019 code-212c neb
DR Gurung
Chemistry-Grade-12-XII-Question-Paper-2076-2019-Sub-Code-212C-NEB
NATIONAL EXAMINATIONS BOARD [NEB]
Chemistry - Grade XII-12 
Examination - 2076 (2019)
Regular Students | Subject Code: 212 ‘C’ 
Time - 3 hrs 
Full Marks - 75 
Pass Marks - 27 (For Partial Student Only)
DOWNLOAD PDF | of Exam Paper | Chemistry | Grade 12-XII | 2076 [2019] NEB
Also Check:

Also Check:

Download PDF Question Paper of PHYSICS Grade XII-12 Sub. Code 210'B' 2075-2019
Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

Group 'A' 

Attempt any fifteen questions. [15x2=30]

1. C in C2H2 gets SP hybridization, why? [2]

2. Distinguish between titration error and normality factor. [2]

3. Write the conjugate acid and base of NH3. [1+1=2]
4. How many coulombs are required to produce [1+1=2]
i) 80 gm of calcium from molten CaCl2?
ii) 50 gm of Aluminium from molten Al2O3?

5. State the first law of thermodynamics. [2]

6. Calculate entropy change (△S) and free energy change (△G) for the conversion of ice into water at equilibrium when enthalpy change (△H) is 9KJ/mol. [2]

7. You are given rate law equation Rate = K[A]2 [B]. By how many times will the rate increase or decrease for the reaction if
i) Concentration of Ⓐ is doubled while that of Ⓑ remain constant.
ii) Concentration of Ⓐ is kept constant that of Ⓑ is doubled. [1=1=2]

8. How is sodiumbenzoate converted into acetophenone? [2]

9. Explain, why chlorobenzene less reactive than benzene in electrophilic substitution reaction? [2]

10. What product would you obtain when phenol is treated with [1+1=2]
i) Benzene diazonium chloride?
ii) Phthalic anhydride?

11. Identify the major product Ⓐ and Ⓑ giving their IUPAC names in the given reaction sequence. [1+1=2]
Methoxy Methane
12. An organic Compound C3H6O does not give silver mirror with tollen's reagent but gives yellow precipitation with NaOH and I2. Identify the compound and write the reactions involved. [2]
13. Why is Nitro group called an ambident group? [2]

14. What happens when aniline is
i) treated with benzene diazonium chloride.
ii) heated with chloroform in presence of alc. KOH. [1+1=2]

15. Write down the functional isomer of methyl methanoate, what product would you expect when the isomer is heated with P2O5? [1+1=2]

16. What are lipids? Name the products formed when simple lipids undergo hydrolysis. [1+1=2]

17. What is meant by i) invert sugar and ii) non-reducing sugar. [1+1=2]

18. Mention an important function of each of the following:
i) DDT
ii) Nitrogen Fertilizer
iii) tranquilizers
iv) board spectrum antibiotics. [0.5x4=2]

19. Name the monomers of backelite and state the polymerisation process of it. [1+1=2]

20. How is granulated zinc obtained? Write its an important application. [1+1=2]

21. Why is silver nitrate solution used for staining fingers of voters during election? [2]

22. What is meant by i) quenching of steel. ii) annealing of steel. [1+1=2]

Group 'B'

Attempt any Five questions: [5x5=25]
23. It is better to express concentration molality rather than molarity, Why? X gm of a metal (equivalent weight=12) was completely dissolved in 100 cc of N/2 HCL solution. The volume was then made upto 500cc. It is found that 25cc of the diluted acid solution required 17.5cc of N/10 NaOH for complete neutralization. Find the value of X. [1+4=5]

24. Mention the important applications of standard hydrogen electrode. The standard electrode potential for are +0.77V and +0.54V respectively.
i) Draw the standard cell notation.
ii) Identify the anode and cathode as the current drawn from it.
iii) Write the cell reaction taking place at the electrodes.
iv) Calculate standard cell potential. [1+1+1+1=4]

25. State enthalpy of combustion. If heat of formation of CO2, H2O and C6H12O6 are -395 KJ mol-1 and 1169 KJ mol-1 respectively. Calculate the heat of combustion of glucose. [1+4=5]

26. Write the chemistry of corrosive sublime. [5]

27. Starting from Grignard's reagent, how would you prepare
i) propan-ol
ii) propan-2-ol.
Mention the chemical test to distinguish them. Write down the structural formula of neo-pentyl alcohol and its IUPAC name. [1+1+2+1=5]

28. How is trichloromethane prepared in the laboratory? Why is it discouraged to use chloroform as an anesthesia? [5]

29. An aliphatic compound 'A' reacts with SOCl2 to give 'B'. The compound 'B' is heated with ammonia to produce 'C'. The Compound 'C' is further heated with Br2/KOH to yield 'D'. The Compound 'D' gives 'E' when treated with NaNO2/HCl at low temperature. The Compound 'E' is primary alcohol which gives positive idoform test. Identify A,B,C,D and E. Write reactions involved. [4+1=5]

Group 'C' 

Attempt any Two questions: [2x10=20]

30. Describe laboratory method of preparation of pure and dry nitrobenzene. Identify the major products A,B,C and D in the following reaction sequence
Reaction Sequence
The compound C can be obtained by oxidation of toluene in presence of CeO2/H+ [6+1+1+1+1=10]
31.
(a) How is propanone prepared from

i) 2, 2-dichloro propane
ii) isopropyl alcohol
iii) propyne.

Give the suitable chemical reaction for the conversation of ethanoicacid into
i) methane
ii) methyl ethanoate. [3+2=5]

b) Write down a structural formula of primary, secondary and tertiary amines of each from C3H9N. How would you apply Hoffmanns' methods to separate them from their mixture? [3+2=5]

32. State Ostwald's dilution law. What is the limitation of this law? Define the terms i) ionic product of water ii) common ion effect iii) degree of ionisation iv) PH value. What will be the resultant PH when 200ml of aqueous solution of HCL (PH =2) is mixed with 300ml of an aqueous solution of NaOH (PH=12)? [1+1+1+1+1+1+4=10]

33. Write short notes of any two. [2x5=10]

i) Chemistry of rusting theory of iron.
ii) Extraction of blister copper from copper pyrites.
iii) Lewis concept of acid and base.
iv) Laboratory preparation of ethoxyethane.
Note :- If you need Grade 12 Chemistry (Subject Code: 212'C') Question paper 2076/2019 in PDF File, please post your email address in "Comment Box" below. :) alert-success
Check and view Chemistry | Grade 12-XII | Question Paper 2076 [2019] | Sub. Code: 212-C | National Examination Board (NEB)
Chemistry-Grade-12-XII-Question-Paper-2076-2019-Sub-Code-212C-NEB
Chemistry Grade 12-XII Question Paper 2076/2019 Sub. Code: 212c NEB

Chemistry-Grade-12-XII-Question-Paper-2076-2019-Sub-Code-212C-NEB
Chemistry Grade 12-XII Question Paper 2076/2019 Sub. Code: 212c NEB

Chemistry-Grade-12-XII-Question-Paper-2076-2019-Sub-Code-212C-NEB
Chemistry Grade 12-XII Question Paper 2076/2019 Sub. Code: 212c NEB

Chemistry-Grade-12-XII-Question-Paper-2076-2019-Sub-Code-212C-NEB
Chemistry Grade 12-XII Question Paper 2076/2019 Sub. Code: 212c NEB

Search Terms/button

NEB Class 12-XII Chemistry Question Paper 2076-2019., 2076 NEB Question Paper 2019., NEB Chemistry Class 12-XII Question Paper 2076/2019., Download NEB Question Paper 2076/2019., Check and Download NEB Chemistry Question 2076/2019., Download Question Paper Of Chemistry 2076/2019 NEB., Check Class Grade 12 NEB Chemistry Question Paper 2076/2019., NEB Question Papers and Solution 2076/2019., Solution Of Question NEB 2076/2019., Solution Of Chemistry Subject Code 212c Question NEB 2076/2019., Chemistry Subject Code 212c Question Paper 2076/2019 alert-info
DR Gurung
A Learner (अज्ञान जस्तो ठूलो शत्रु अरु केही छैन।) 🙏🙏
Comments
First of all, thank you for taking the time to read my blog. It's much appreciated! If you would like to leave a comment, please do, I'd love to hear what you think!

Suggestions and/or questions are always welcome, either post them in the comment form or send me an email at drgurung82@gmail.com.

However, comments are always reviewed and it may take some time to appear. Always keep in mind "URL without nofollow tag" will consider as a spam.

To add an image:
[image] image_url [/image]

To add a code block:
[code] your_code [/code]

To add a quote:
[quote] your_quote [/quote]

To add a link:
[link] your_link_text | link_url [/link]
Comment Poster
Send me all questions of science faculty 12 2076
Replied
Send me all paper of science faculty 12 past questions 2074,2075,2076
Replied
Send me all the past questions of science faculty of the past 3 years please!
Comment Poster
Please send me the question paper of class 12 chemistry of year 2074 & 2075
Comment Poster
hey, Dhanraj daju, Science grade 12 ko sabai question paper (bio+maths apni).
spd7abel@gmail.com
User
Comment Poster
Provide me all important question of all subject science class 12
Comment Poster
Will you please provide me the past question papers of chemistry Grade 11 & 12?
My email address is adhisth@gmail.com
Comment Poster
Dear All, an email with requested pdf attachment has been sent to your emails. Please check. 😊
Comment Poster
send me
Comment Poster
humble request to send me all class 12 science questions paper
Comment Poster
Please send me class 12 all important past question paper of PCB
Comment Poster
Can you send me pdf of all questions of science faculty of 2076/2019 at deviltherez@gmail.com? Thank you :)
Replied
Dear Devil, an email with requested attached files have been sent to your email. Please check.😊
Replied
Send me all question paper of past 5 years pleseeeeee