CLASS 12 CHEMISTRY SAMPLE PAPER (IMPORTANT FOR HALF YEARLY EXAMS PRACTICE)

 CLASS 12 CHEMISTRY SAMPLE PAPER

 (IMPORTANT FOR HALF YEARLY EXAMS PRACTICE)

The possible syllabus (SYLLABUS) for CLASS 12 chemistry for HALFY YEARLY EXAM 2022-23 is as follows

CHEMISTRY SYLLABUS

Chapter 1 Solid State has been dropped for this session Will be included in 2023-24

Chapter 2 Willian

Chapter 5 Chemistry has been dropped for this session will be included in 2023-24

Chapter 3 Electrochemistry

Chapter 6 Principles and Processes of Extraction of Elements has been dropped for this session Will be included in 2023-24

Chapter 7 Elements of P Block Group (15, 16 and Group 17, 18) (Will be included in 2023-24)

  Chapter 9 Coordinating Compounds

  11. alcohol, phenol, ether

10. hello alken and hello aerin

13. aldehyde, ketone, carboxylic acid

14. biomolecules

Chapter 8 DF Block Groups

Chapter 10 Chemistry in Daily Life has been dropped for the session 2023-24 to be included

Note - Questions are not likely to come from the deleted course

                  CLASS 12 CHEMISTRY OBJECTIVE QUESTIONS FOR 28 MARKS

                                   Will be asked Objective questions are mainly asked in 4 types

1.Choose the correct option

2. Write the answer in one word/sentence

3. Fill in the blanks

match 4 right pair

Apart from this, 8 questions of 2 marks, 4 questions of 3 marks, 1 question of 4 marks and 2 questions of 5 marks will also be asked.

                Half Yearly Exam 2022-23

                    model question paper

                      CLASS 12 chemistry

Time-3.00 hours Marks-70

Instructions:-1. It is compulsory to attempt all the questions.

  2. Question no. Internal options are given from 05 to 19.

  3. Question no. Marks 01 to 04 are objective type questions. Separate marks are prescribed for each question.

4. Marks for each question are indicated against it.

5. Question no. Answer each question from 05 to 12 in 30-40 words

6.Question no. Answer questions from 13 to 16 in about 75-80 words each.

7.Question no. Answer 17 in about 80-100 words

7. Question no. Answer questions 18 to 19 in about 120-150 words each.

Question 1. Write the correct option- 1×7 = 7

i. atomic number is not a property

  (A) Boiling point elevation (B) Vapor pressure (C) Freezing point depression (D) Osmotic pressure

II. 1 Faraday is the value of electricity?

(a) 3.7x 10^6 coulomb (b) 6.23x 10^23 coulomb (c) 10^6 coulomb (d) 96500 coulomb

III. Which transition element has the highest oxidation state?

   A.Sc B.Ti C.Mn D.Zn

iv. Mohr's salt is

(A) double salt (B) complex salt (C) neutral compound (D) reagent

v. Ethyl iodide is obtained on heating with alcoholic KOH -

(a) Ethanol (b) Ethane (c) Acetylene (d) Ethylene

vi. The nature of phenol is

   ,

(A) acidic (B) alkaline

  (C) Ambivalent (D) Neutral

vii Which protein transports O2 in the blood stream?

(a) myoglobin (b) insulin

(c) albumin (d) hemoglobin

Question 2. Fill in the blanks - 1×7 = 7

On increasing the dilution ------------------- conductivity decreases.

II. f block elements are called

iii. The general formula of alkyl halide is --------------.

iv. By the destructive distillation of wood------------------------ alcohol is obtained.

v. Deficiency of Vitamin A causes an eye disease called --------------------.

vi. From red ants ------------ acid is obtained?

viii. The chemical formula of potassium permanganate is ------------. ,

  

Question 3. Match the correct pair 1×7 = 7

               A                             B

Billion of Gases to Liquid - Milk

fast reaction - photosynthesis

Chloropicrin - Copper

lactose - polydentate

  Mir Ben's Oil - War Gas

  EDTA nitro benzene

   Coin Metal - Soda Water

                                                         

Question.4. Write answer in one sentence. 1×7 = 7

i. Why zinc does not show variable valency?

II. What are the types of bonds formed by the primary valency of burner?

iii. Which metal is used in boortz synthesis process?

iv. What is formed on dehydration of alcohols?

v. What is the billion of ammonical silver nitrate called?

vi Write the chemical name of Vitamin C?

vii. Willian. What is that which is distilled at the same temperature without changing its composition called?

Question.5. Write any one application of what is Kohler's law (2)

                                          Or

                   what is called even isotonic solution 

Question.6. Define osmosis and osmotic pressure? (2)

                                         Or

                             What is specific conductivity?

Question 7. 120 grams of NaOH is dissolved in 2 liters of solution  , then find the molarity of solution? ,             (2)

                                           Or

   If 6 grams of urea is dissolved in 72 grams of water, then find the mole fraction of urea?

Question 8. Write the formulas of the following coordination compounds.

i. hexa amine platinum(iv) chloride

II. hexa aqua chromium(iii) chloride? (2)

                           Or

What is ligand give any one example?

Question 9. 13. Explain what is the effective atomic number?

                                   Or

        What are double salts? Write any one example with formula. (2)

Question 10. What is formalin, write its uses? (2)

                                Or

  Why are ketones more active than aldehydes?

                        

Question 11. Write two differences between DNA and RNA? (2)

                          Or

      What is peptide bond?

Question.12. What are proteins, write their types? (2)

                      Or

  DNA What is fingerprinting?

Question.13. Why are transition elements good catalysts? (3)

                                Or

  Write any three differences between lanthanide and actinide

    

Question 14. Give reason why alkyl halide is insoluble in water even though C-X is polar. (3)

                              Or

   What happens when (write only chemical equation)-

i. Chlorobenzene is heated with copper cyanide in the presence of pyridine

ii. Chlorobenzene is heated with sodium in the presence of ether.

iii ethyl bromide is heated with alcoholic KOH

Question 15. Write any difference between phenol and alcohol. 3

                          Or

  Write short note on the following

i, denatured spirit ii. pure alcohol

Question 16. Describe the method of oxidation or dehydrogenation to distinguish between primary, secondary and tertiary alcohols with equation 3

Or

How is alcohol obtained from molasses? Write the necessary equation.

Question 17. Explain the following (give only equation)-

  i sand meyer reaction ii boortz fitting reaction

iii Carbyl amine reaction iv Haloform reaction (4)

                     Or

       Write the method and use of the following

                 i. DDT II. BHC ,

Question 18. Explain the relation between specific conductance and cell constant called cell constant. (5)

                                   Or

  What is the standard hydrogen electrode? Write two limitations of how it is made.

Question 19. Explain the quick vinegar method for the manufacture of acetic acid on the basis of the following points- ( 5)

  i.Theory and Equations ii. named picture

                       Or

  explain the following reaction

  i.Cannizzaro reaction ii. aldol condensation

Note-

1. Some grammatical errors are possible in the question paper and text material, please ignore them and take the efforts made in a positive way.

2 . Click and remember the site https://www.vimarshportal.in for model question paper, blue print, question bank, and practice paper for upcoming annual examination etc. of all other subjects of class 9th to 12th

Note- Students can practice this question paper well, along with it they can also prepare well whatever preparation they have done. To check your preparation, please write the answers of the above question paper in your copy or answer book by yourself and check those answers yourself with the help of your book and other material. This type of practice will surely give you not only semi Can get good marks in annual examination but also in annual examination.

In the above question paper, the syllabus till November 2022 has been taken, as well as it has not included the removed syllabus for this year, but by mistake, if any subject matter point or question is included in it, please do not take it otherwise. Because in the upcoming session 2023-24 you have to study from the complete syllabus and questions will be asked from that only.

For the preparation of class 9th to 12th examinations, keep visiting https://www.vimarshportal.in continuously and also inform your friends about it.