BISE Multan · Class 12 · Chemistry

BISE Multan · Class 12 · Chemistry · 2026 · First Annual · Group 1

2026 · First Annual

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

Objective

These versions contain different content. Choose the source edition you need; they are alternatives, not consecutive exam sections.

Objective · 4481

Source code: 4481 · Printed marks: 17 · Time: 20 Minutes

OBJECTIVE

You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that bubble in front of that question number, on bubble sheet. Use marker or pen to fill the bubbles. Cutting or filling two or more bubbles will result in zero mark in that question.
Q1(1)
Mark the correct statement:
- (A)
  $N a^{+}$ is smaller than $N a$ atom
- (B)
  $N a^{+}$ is larger than $N a$ atom
- (C)
  $C l^{-}$ is smaller than $C l$ atom
- (D)
  $C l^{-}$ (ion) and $C l$ (atom) are equal in size
Q1(2)
Which element is deposited at the cathode during the electrolysis of brine in diaphragm cell?
- (A)
  $O_{2}$
- (B)
  $N a$
- (C)
  $C l_{2}$
- (D)
  $H_{2}$
Q1(3)
The chemical formula of soapstone is:
- (A)
  $C a M g_{3} (S i O_{3})_{4}$
- (B)
  $M g_{3} H_{2} (S i O_{3})_{4}$
- (C)
  $N a_{2} S i O_{3}$
- (D)
  $K_{2} O . A l_{2} O_{3} .6 S i O_{2}$
Q1(4)
Which catalyst is used in contact process?
- (A)
  $F e_{2} O_{3}$
- (B)
  $S O_{3}$
- (C)
  $V_{2} O_{5}$
- (D)
  $A g_{2} O$
Q1(5)
Hydrogen bond is the strongest between the molecules of:
- (A)
  $H F$
- (B)
  $H C l$
- (C)
  $H B r$
- (D)
  $H I$
Q1(6)
Which of the given is typical transition metal?
- (A)
  $S C$
- (B)
  $Y$
- (C)
  $R a$
- (D)
  $C o$
Q1(7)
The state of hybridization of carbon atom in methane is:
- (A)
  $s p^{3}$
- (B)
  $s p^{2}$
- (C)
  $s p$
- (D)
  $d s p^{2}$
Q1(8)
The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with rule:
- (A)
  Hund's Rule
- (B)
  Markownikov's Rule
- (C)
  Pauli's Exclusion Principle
- (D)
  Aufbau Principle
Q1(9)
Which one of the given acid can be used as Catalyst in Friedal-Crafts reactions?
- (A)
  $A l C l_{3}$
- (B)
  $H N O_{3}$
- (C)
  $B e C l_{2}$
- (D)
  $N a C l$
Q1(10)
In a primary alkyl halide halogen atom is attached with a carbon which is further attached to how many Carbon atom?
- (A)
  Four
- (B)
  Three
- (C)
  Two
- (D)
  One
Q1(11)
Ethanol can be converted into ethanoic acid by:
- (A)
  Hydrogenation
- (B)
  Reduction
- (C)
  Oxidation
- (D)
  Hydration
Q1(12)
Cannizzaro's reaction is not given by:
- (A)
  Formaldehyde
- (B)
  Acetaldehyde
- (C)
  Benzaldehyde
- (D)
  Trimethyl-acetaldehyde
Q1(13)
Which derivative can not be prepared directly from acetic acid?
- (A)
  Acetamide
- (B)
  Acetyl chloride
- (C)
  Acetic anhydride
- (D)
  Ethyl acetate
Q1(14)
The reaction between fat and $N a O H$ is called:
- (A)
  Esterification
- (B)
  Hydrogenolysis
- (C)
  Fermentation
- (D)
  Saponification
Q1(15)
Hydrolysis of fat is brought about by:
- (A)
  Lipase
- (B)
  Zymase
- (C)
  Maltase
- (D)
  Urease
Q1(16)
Which one of the given is not Calcarious material?
- (A)
  Lime
- (B)
  Clay
- (C)
  Marble
- (D)
  Marine shell
Q1(17)
To avoid the formation of toxic compounds with $C l_{2}$ which substance is used for disinfecting water?
- (A)
  $K M n O_{4}$
- (B)
  $O_{3}$
- (C)
  Alums
- (D)
  Chloramines

Objective · 4483

Source code: 4483 · Printed marks: 17 · Time: 20 Minutes

OBJECTIVE

You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that bubble in front of that question number, on bubble sheet. Use marker or pen to fill the bubbles. Cutting or filling two or more bubbles will result in zero mark in that question.
Q1(1)
Which one of the given acid can be used as Catalyst in Friedal-Crafts reactions?
- (A)
  $A l C l_{3}$
- (B)
  $H N O_{3}$
- (C)
  $B e C l_{2}$
- (D)
  $N a C l$
Q1(2)
In a primary alkyl halide halogen atom is attached with a carbon which is further attached to how many Carbon atom?
- (A)
  Four
- (B)
  Three
- (C)
  Two
- (D)
  One
Q1(3)
Ethanol can be converted into ethanoic acid by:
- (A)
  Hydrogenation
- (B)
  Reduction
- (C)
  Oxidation
- (D)
  Hydration
Q1(4)
Cannizzaro's reaction is not given by:
- (A)
  Formaldehyde
- (B)
  Acetaldehyde
- (C)
  Benzaldehyde
- (D)
  Trimethyl-acetaldehyde
Q1(5)
Which derivative can not be prepared directly from acetic acid?
- (A)
  Acetamide
- (B)
  Acetyl chloride
- (C)
  Acetic anhydride
- (D)
  Ethyl acetate
Q1(6)
The reaction between fat and $N a O H$ is called:
- (A)
  Esterification
- (B)
  Hydrogenolysis
- (C)
  Fermentation
- (D)
  Saponification
Q1(7)
Hydrolysis of fat is brought about by:
- (A)
  Lipase
- (B)
  Zymase
- (C)
  Maltase
- (D)
  Urease
Q1(8)
Which one of the given is not Calcarious material?
- (A)
  Lime
- (B)
  Clay
- (C)
  Marble
- (D)
  Marine shell
Q1(9)
To avoid the formation of toxic compounds with $C l_{2}$ which substance is used for disinfecting water?
- (A)
  $K M n O_{4}$
- (B)
  $O_{3}$
- (C)
  Alums
- (D)
  Chloramines
Q1(10)
Mark the correct statement:
- (A)
  $N a^{+}$ is smaller than $N a$ atom
- (B)
  $N a^{+}$ is larger than $N a$ atom
- (C)
  $C l^{-}$ is smaller than $C l$ atom
- (D)
  $C l^{-}$ (ion) and $C l$ (atom) are equal in size
Q1(11)
Which element is deposited at the cathode during the electrolysis of brine in diaphragm cell?
- (A)
  $O_{2}$
- (B)
  $N a$
- (C)
  $C l_{2}$
- (D)
  $H_{2}$
Q1(12)
The chemical formula of soapstone is:
- (A)
  $C a M g_{3} (S i O_{3})_{4}$
- (B)
  $M g_{3} H_{2} (S i O_{3})_{4}$
- (C)
  $N a_{2} S i O_{3}$
- (D)
  $K_{2} O . A l_{2} O_{3} .6 S i O_{2}$
Q1(13)
Which catalyst is used in contact process?
- (A)
  $F e_{2} O_{3}$
- (B)
  $S O_{3}$
- (C)
  $V_{2} O_{3}$
- (D)
  $A g_{2} O$
Q1(14)
Hydrogen bond is the strongest between the molecules of:
- (A)
  $H F$
- (B)
  $H C l$
- (C)
  $H B r$
- (D)
  $H I$
Q1(15)
Which of the given is typical transition metal?
- (A)
  $S C$
- (B)
  $Y$
- (C)
  $R a$
- (D)
  $C o$
Q1(16)
The state of hybridization of carbon atom in methane is:
- (A)
  $s p^{3}$
- (B)
  $s p^{2}$
- (C)
  $s p$
- (D)
  $d s p^{2}$
Q1(17)
The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with rule:
- (A)
  Hund's Rule
- (B)
  Markownikov's Rule
- (C)
  Pauli's Exclusion Principle
- (D)
  Aufbau Principle

Subjective

Printed marks: 68 · Time: 2.40 Hours

NOTE: Write same question number and its parts number, on answer book, as given in the question paper.
SECTION-I
SECTION-II. NOTE: Write answers of any three questions.

SECTION-I

2
Write answers of any eight parts.
Q2(i)
The hydration energies of the different ions are in the given order $A l^{3 +} > M g^{2 +} > N a^{+}$ . Give reason.
(2 marks)
Q2(ii)
Give any two advantages of Down’s cell.
(2 marks)
Q2(iii)
What is Lime water? Give its one use.
(2 marks)
Q2(iv)
How does orthoboric acid react with the given (a) $N a O H$ (b) $C_{2} H_{5} O H$
(2 marks)
Q2(v)
Impure clay is fused easily. Justify.
(2 marks)
Q2(vi)
$P_{2} O_{5}$ is powerful dehydrating agent. Prove it by giving one example.
(2 marks)
Q2(vii)
Write four uses of Sulphuric acid ( $H_{2} S O_{4}$ ).
(2 marks)
Q2(viii)
What is meant by Fuming Nitric Acid?
(2 marks)
Q2(ix)
Ammonium Nitrate cannot be used as fertilizer for paddy rice. Give reason.
(2 marks)
Q2(x)
Explain the term setting of cement.
(2 marks)
Q2(xi)
How are pesticides dangerous to human beings?
(2 marks)
Q2(xii)
Write down names of components of environment.
(2 marks)
3
Write answers of any eight parts.
Q3(i)
What is Iodized Salt? Give its use.
(2 marks)
Q3(ii)
What are Freons and Teflons?
(2 marks)
Q3(iii)
Give two applications of Helium gas.
(2 marks)
Q3(iv)
What is Chromyl Chloride Test?
(2 marks)
Q3(v)
What is difference between Homocyclic and Heterocyclic compounds?
(2 marks)
Q3(vi)
How will you convert Ethyne into Oxalic acid?
(2 marks)
Q3(vii)
Convert Ethyne into 1, 1 – Dibromoethane
(2 marks)
Q3(viii)
Define Aldol condensation reaction with an example.
(2 marks)
Q3(ix)
What is the use of Iodoform Test?
(2 marks)
Q3(x)
How will you prepare Amino Acid using $B r_{2}$ and $N H_{3}$ ?
(2 marks)
Q3(xi)
What are acidic and basic amino acids? Give one example each.
(2 marks)
Q3(xii)
What is Glacial Acetic Acid?
(2 marks)
4
Write answers of any six parts.
Q4(i)
What happens when a mixture of benzene vapours and air are passed over heated $V_{2} O_{5}$ ?
(2 marks)
Q4(ii)
Draw the structural formulas of (a) p – Dibenzylbenzene (b) 2, 4, 6 – Trinitrotoluene
(2 marks)
Q4(iii)
Write down steps involved in $E 1$ reaction mechanism.
(2 marks)
Q4(iv)
What is Wurtz synthesis? Give an example.
(2 marks)
Q4(v)
Why are the boiling points of alcohols higher than their corresponding alkanes?
(2 marks)
Q4(vi)
Give reactions of ethanol with (a) $N H_{3}$ (b) $N a$
(2 marks)
Q4(vii)
What do you mean by the rancidity of oils and fats?
(2 marks)
Q4(viii)
What are enzymes? Mention two remarkable properties of enzymes.
(2 marks)
Q4(ix)
Write two differences between DNA and RNA.
(2 marks)

SECTION-II

SECTION-II. NOTE: Write answers of any three questions.

Q5
(8 marks)
1. (a)
  Define Ionization Energy. Discuss its trend in the periodic table in detail.
  (4 marks)
2. (b)
  Write down peculiar behaviour of Lithium. (Eight points)
  (4 marks)
Q6
(8 marks)
1. (a)
  Explain the manufacturing of wrought iron from cast iron.
  (4 marks)
2. (b)
  Define Water pollution. Explain the factors affecting the quality of water.
  (1 + 3 = 4)
Q7
(8 marks)
1. (a)
  What is cracking? Explain its types.
  (4 marks)
2. (b)
  Describe with mechanism the Aldol condensation reaction. Also give at least two suitable examples.
  (4 marks)
Q8
(8 marks)
1. (a)
  Discuss acidic nature of alkynes with suitable reactions.
  (4 marks)
2. (b)
  How does ethyl bromide react with (i) $N a / e t h e r$ (ii) $N a_{4} P b$ (iii) $Z n + H C l$ (iv) $N O_{2}^{- 1}$
  (4 marks)
Q9
(8 marks)
1. (a)
  Explain the given terms by giving suitable reactions with respect to benzene: (i) Side chain halogenation in Sun Light (ii) Side chain oxidation
  (2 + 2 = 4)
2. (b)
  Write a note on Lucas Test. Explain with complete reactions and also give its significance.
  (3 + 1 = 4)

Original source references (5)

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

Objective · 4481 · Printed marks: 17 · Time: 20 Minutes
Objective · 4483 · Printed marks: 17 · Time: 20 Minutes
Objective · 4485 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 4487 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Subjective · psp_a6fe20aa7c6e4cd8899f39ff8e201ec7 · Printed marks: 68 · Time: 2.40 Hours