BISE Gujranwala · Class 12 · Chemistry

BISE Gujranwala · Class 12 · Chemistry · 2025 · Group 1

2025

Transcribed from the identified examination paper. Check the board, session and course before use. SchoolOrbit is not affiliated with the issuing board.

Objective

Printed marks: 17 · Time: 20 Min.

OBJECTIVE

Q1(1)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Mark the correct statement
- (A)
  Metallic character increases down the group
- (B)
  Metallic character increases from left to right along a period
- (C)
  Metallic character remains the same from left to right along a period
- (D)
  Metallic character remains the same down in group
Q1(2)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
The oxides of Beryllium are
- (A)
  Acidic
- (B)
  Basic
- (C)
  Amphoteric
- (D)
  None of these
Q1(3)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
The chief ore of Aluminium is
- (A)
  $N a_{3} A l F_{6}$
- (B)
  $A l_{2} O_{3} .2 H_{2} O$
- (C)
  $A l_{2} O_{3}$
- (D)
  $A l_{2} O_{3} . H_{2} O$
Q1(4)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which catalyst is used in contact process?
- (A)
  $F e_{2} O_{3}$
- (B)
  $V_{2} O_{5}$
- (C)
  $S O_{3}$
- (D)
  $A g_{2} O$
Q1(5)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which is strongest acid?
- (A)
  $H C l O$
- (B)
  $H C l O_{2}$
- (C)
  $H C l O_{3}$
- (D)
  $H C l O_{4}$
Q1(6)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which of the following is a typical transition metal?
- (A)
  $S c$
- (B)
  $Y$
- (C)
  $R a$
- (D)
  $C o$
Q1(7)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Select the one which is alcohol
- (A)
  $C H_{3} C H_{2} O H$
- (B)
  $C H_{3} O C H_{3}$
- (C)
  $C H_{3} C O O H$
- (D)
  $C H_{3} C H_{2} B r$
Q1(8)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Vinyl acetylene combines with $H C l$ to form
- (A)
  Polyacetylene
- (B)
  Benzene
- (C)
  Chloroprene
- (D)
  Divinylacetylene
Q1(9)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which acid can be used as a catalyst in Friedel Crafts Reactions?
- (A)
  $A l C l_{3}$
- (B)
  $H N O_{3}$
- (C)
  $B e C l_{3}$
- (D)
  $N a C l$
Q1(10)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which one is not a nucleophile?
- (A)
  $H_{2} O$
- (B)
  $H_{2} S$
- (C)
  $B F_{3}$
- (D)
  $N H_{3}$
Q1(11)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Rectified spirit contains alcohol about?
- (A)
  $80 %$
- (B)
  $85 %$
- (C)
  $90 %$
- (D)
  $95 %$
Q1(12)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which compound will not give iodoform test on treatment with $I_{2} / N a O H$ ?
- (A)
  Acetaldehyde
- (B)
  Acetone
- (C)
  Butanone
- (D)
  3-pentanone
Q1(13)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Acetic acid is manufactured by
- (A)
  Distillation
- (B)
  Fermentation
- (C)
  Ozonolysis
- (D)
  Esterification
Q1(14)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which element is not present in all proteins?
- (A)
  Carbon
- (B)
  Hydrogen
- (C)
  Sulphur
- (D)
  Nitrogen
Q1(15)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
Which three elements are needed for the healthy growth of plants?
- (A)
  $N, S, P$
- (B)
  $N, C a, P$
- (C)
  $N, K, C$
- (D)
  $N, P, K$
Q1(16)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
How many Ozone molecules can a single chloride free radical destroy?
- (A)
  100
- (B)
  100,000
- (C)
  10,000
- (D)
  10
Q1(17)
You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that circle in front of the relevant question number. Use marker or pen to fill in the circles. Cutting or filling of two or more circles will result zero mark in that question.
In purification of potable water the coagulant used is
- (A)
  Nickel Sulphate
- (B)
  Copper Sulphate
- (C)
  Alum
- (D)
  Barium Sulphate

Subjective

Printed marks: 68 · Time: 2.40 hrs.

Note: Section I is compulsory. Attempt any THREE (3) questions from Section II.

UNSOLVED
Chemistry
Gujranwala Board 2025 Group – I
Subjective

SECTION – I

Q.2
Write short answers to any EIGHT (8) questions:
(16)
1. i
  Ionization energy of ${M g}^{+ 2}$ is always greater than ${M g}^{+ 1}$ . Write down reason.
2. ii
  Oxides of non-metals are acidic in nature. Write down reason.
3. iii
  Write down formulae of the minerals:
  
  i) Natron ii) Gypsum
4. iv
  What happens when i) Lithium Carbonate is heated
  
  ii) Lithium Hydroxide is heated to red hot
5. v
  Draw hybridization structure of ethane.
6. vi
  What are aromatic compounds? Write down two examples.
7. vii
  Discuss the reactivity of a $π$ -bond.
8. viii
  What is Raney Nickel? How is it prepared? Write down its use.
9. ix
  Write down ozonolysis reaction of Benzene.
10. x
  Convert nitrobenzene into m-Chloronitrobenzene.
11. xi
  Define nucleophile by giving two examples of nucleophiles.
12. xii
  Convert ethyl bromide into Diethylamine.
Q.3
Write short answers to any EIGHT (8) questions:
(16)
1. i
  What is chemical garden?
2. ii
  Impure clay is fused easily. Justify.
3. iii
  Write down the action of Conc. ${H N O}_{3}$ on $H_{2} S$ and $H I$ .
4. iv
  What happens when $H_{3} {P O}_{4}$ is subjected to heat?
5. v
  How will you prepare Phenol by using Dow’s method?
6. vi
  Write down structural formula of Methoxy Benzene and Tartaric Acid.
7. vii
  Write down Chemistry of Fehling’s Solution Tests.
8. viii
  Write down two uses of Formaldehyde.
9. ix
  What are essential and non-essential amino acids?
10. x
  Write down structural Formula of Melonic Acid and Phthalic Acid.
11. xi
  What is Glycogen?
12. xii
  How can you denature Protein?
Q.4
Write short answers to any SIX (6) questions:
(12)
1. i
  Write down any two uses of ${C l O}_{2}$ .
2. ii
  Why Iodine has metallic luster?
3. iii
  How does the process of galvanizing protect iron from rusting?
4. iv
  Define coordination sphere. Write down an example.
5. v
  Discuss the reactions taking place in first 24 hours of setting of cement.
6. vi
  What are macro-nutrients? Write down their requirement per acre.
7. vii
  Write down the names of components of the environment.
8. viii
  What are leachates?
9. ix
  How acid rain affects our environment?

SECTION-II

Q.5(a)
What are halides? Classify different types of halides with trend in the Periodic Table.
(4)
(b)
Explain peculiar behaviour of Beryllium with other members of its family by four ways.
(4)
Q.6(a)
Write down any four methods for the preparation of $C_{6} H_{6}$ .
(4)
(b)
Define cracking and discuss its different types.
(4)
Q.7(a)
Convert the following:

i) Ethane into Methane. ii) Acetic Acid into Ethane
(4)
(b)
Explain Cannizzaro’s Reaction along with Mechanism and one example.
(4)
Q.8(a)
What do you know about Phenol? Write reactions of Phenol in which ‘OH’ group is involved.
(4)
(b)
Starting from Carboxylic Acid prepare:

i) Acid anhydride ii) Alkane

iii) Ester iv) Amide
(4)
Q.9(a)
Write down the commercial uses of Halogens and their compounds. (Any eight)
(4)
(b)
Explain the Bessemer’s process for the manufacturing of steel.
(4)

Original source references (2)

The original files and numbering are retained. Equivalent files do not repeat the questions above.

Objective · psp_68513aca9510e920eaa05290cb44f967 · Printed marks: 17 · Time: 20 Min.
Subjective · psp_e85624d2de7512cd60c28b4ef1e46be7 · Printed marks: 68 · Time: 2.40 hrs.