BISE Multan · Class 12 · Chemistry

BISE Multan · Class 12 · Chemistry · 2026 · First Annual · Group 2

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

Source code: 4482 · 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)
Among second period elements, the least ionization energy will be of:
- (A)
  $L i$
- (B)
  $B e$
- (C)
  $B$
- (D)
  $C$
Q1(2)
Dolomite has a formula of:
- (A)
  $N a N O_{3}$
- (B)
  $M g C O_{3}$
- (C)
  $M g C O_{3} . C a C O_{3}$
- (D)
  $B a S O_{4}$
Q1(3)
The acid which will give only one $H^{+}$ when added in water is:
- (A)
  $H_{3} P O_{4}$
- (B)
  $H_{3} B O_{3}$
- (C)
  $H_{2} S O_{4}$
- (D)
  $H_{2} C O_{3}$
Q1(4)
In cold water ${P_{2} O_{5}}_{(s)}$ react with water to give:
- (A)
  $H_{3} P O_{3}$
- (B)
  $H_{3} P O_{4}$
- (C)
  $H P O_{2}$
- (D)
  $H P O_{3}$
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 one of the given is a Non-typical transition element?
- (A)
  $C r$
- (B)
  $M n$
- (C)
  $Z n$
- (D)
  $F e$
Q1(7)
Pentane has chain isomers:
- (A)
  2
- (B)
  3
- (C)
  4
- (D)
  5
Q1(8)
2-Butyne will give Cis-2-Butene when reacted with $H_{2}$ in the presence of:
- (A)
  $N a / L i q . N H_{3} / - 33^{\circ} C$
- (B)
  $N i / H_{2}$
- (C)
  $L i A l H_{4}$
- (D)
  $P d (B a S O_{4}) / Q u i n o l i n e$
Q1(9)
Which one of the given acid can be used as a catalyst in Friedel-Crafts reactions?
- (A)
  $A l C l_{3}$
- (B)
  $H N O_{3}$
- (C)
  $B e C l_{2}$
- (D)
  $N a C l$
Q1(10)
Which one of the given is not a nucleophile?
- (A)
  $H_{2} O$
- (B)
  $H_{2} S$
- (C)
  $B F_{3}$
- (D)
  $N H_{3}$
Q1(11)
Rectified spirit is:
- (A)
  95% Alcohol
- (B)
  100% Alcohol
- (C)
  12% Alcohol
- (D)
  14% Alcohol
Q1(12)
Which one of the given will have the highest Boiling Point?
- (A)
  Mathanal
- (B)
  Ethanal
- (C)
  Propanal
- (D)
  2-Hexanone
Q1(13)
Formula of Malonic acid is:
- (A)
  $H O O C - C O O H$
- (B)
  $H O O C - C H_{2} - C O O H$
- (C)
  $H_{5} C_{6} - C O O H$
- (D)
Q1(14)
Which one of the given is not a thermosetting polymer?
- (A)
  PVC
- (B)
  Synthetic varnish
- (C)
  Epoxy resins
- (D)
  Bakelite
Q1(15)
The fibre which is made from acrylonitrile as monomer?
- (A)
  PVC
- (B)
  Plastic
- (C)
  Polyamide resin
- (D)
  Acrylic fibre
Q1(16)
Nitrogen fertilizer having 75% plant nutrients is:
- (A)
  Urea
- (B)
  Ammonia
- (C)
  Diammonium phosphate
- (D)
  Ammonium nitrate
Q1(17)
Micro-nutrients are required in quantity ranging from:
- (A)
  4-40 g
- (B)
  6-200 g
- (C)
  6-200 kg
- (D)
  4-40 kg

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)
How melting and boiling points varied in a period?
(2 marks)
Q2(ii)
Write the formulas of (a) Natron (b) Sylvite
(2 marks)
Q2(iii)
Why $C a C l_{2}$ is added during melting of $N a C l$ in Down’s cell.
(2 marks)
Q2(iv)
Why silicones are preferred over organic lubricants?
(2 marks)
Q2(v)
Write four uses of sodium silicate.
(2 marks)
Q2(vi)
How Sulphuric acid is used as dehydrating agent. Give two reactions.
(2 marks)
Q2(vii)
Write two dissimilarities of Sulphur and Oxygen.
(2 marks)
Q2(viii)
Write any four uses of Nitric acid.
(2 marks)
Q2(ix)
What do you mean by term “Setting of Cement”?
(2 marks)
Q2(x)
How digestion process is carried out in paper industry?
(2 marks)
Q2(xi)
How the industrial wastes are treated?
(2 marks)
Q2(xii)
Write role of detergents as water pollutants and give its effects.
(2 marks)
3
Write answers of any eight parts.
Q3(i)
Why iodine has Metallic Luster? Give brief answer.
(2 marks)
Q3(ii)
Give any two uses of bleaching powder.
(2 marks)
Q3(iii)
Name the factors on which oxidizing power of halogens depend.
(2 marks)
Q3(iv)
Define Ligand. Give two examples.
(2 marks)
Q3(v)
What are Heterocyclic Compounds? Give any two examples.
(2 marks)
Q3(vi)
Convert tertiary alcohols into alkenes by suitable reaction.
(2 marks)
Q3(vii)
Convert ethene into ethylene glycol by suitable reaction.
(2 marks)
Q3(viii)
Give any two uses of acetaldehyde.
(2 marks)
Q3(ix)
Convert acetone into isopropyl alcohol by any suitable reaction.
(2 marks)
Q3(x)
Draw the structural formula of Glutamic Acid.
(2 marks)
Q3(xi)
How amino acids are converted into amino esters? Give reaction.
(2 marks)
Q3(xii)
Differentiate between essential and non-essential amino acids.
(2 marks)
4
Write answers of any six parts.
Q4(i)
Describe with mechanism the Sulphonation of Benzene.
(2 marks)
Q4(ii)
How will you prepare Maleic acid from Benzene by Catalytic oxidation?
(2 marks)
Q4(iii)
Write only the mechanism of $S_{N} 1$ reaction of Alkyl halide.
(2 marks)
Q4(iv)
Write chemical reaction of Grignard reagent with $C O_{2}$ and Ethylene epoxide.
(2 marks)
Q4(v)
Describe Lucas Test with example.
(2 marks)
Q4(vi)
Why and when Alcohols give different products with $H_{2} S O_{4}$ ?
(2 marks)
Q4(vii)
Differentiate between DNA and RNA. (Four points).
(2 marks)
Q4(viii)
Point out one difference between the given: (a) Glucose and Fructose (b) Cellulose and Starch
(2 marks)
Q4(ix)
Define Carbohydrates. How are they classified?
(2 marks)

SECTION-II

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

Q5
(8 marks)
1. (a)
  Discuss improvements in the Mendeleev’s Periodic Table.
  (4 marks)
2. (b)
  Describe with diagram working of Nelson cell for the manufacturing of Caustic Soda.
  (4 marks)
Q6
(8 marks)
1. (a)
  Explain the given properties transition elements: (i) Oxidation state (ii) Colour formation
  (4 marks)
2. (b)
  How water is purified by passing chlorine gas? Also give the harmful effects of chlorinated water.
  (4 marks)
Q7
(8 marks)
1. (a)
  Discuss the types of structural isomerism with examples.
  (4 marks)
2. (b)
  Define and explain Aldol condensation with reaction mechanism. Also write two suitable examples.
  (4 marks)
Q8
(8 marks)
1. (a)
  How will you convert ethyne into (i) Acetaldehyde (ii) Divinyl acetylene (iii) Glyoxal (iv) Benzene
  (4 marks)
2. (b)
  What products are formed when the given compounds are treated with methyl magnesium bromide, followed by acid hydrolysis? (i) $C H_{3} C H O$ (ii) $(C H_{3})_{2} C O$ (iii) $H C H O$ (iv) $C O_{2}$
  (4 marks)
Q9
(8 marks)
1. (a)
  Prepare benzene by any four methods. Also write reactions of preparation.
  (4 marks)
2. (b)
  How does ethanol react with given compounds? (i) $P C l_{5}$ (ii) $P C l_{3}$ (iii) $S O C l_{2}$ (iv) $C H_{3} C O O H$
  (4 marks)

Original source references (5)

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

Objective · 4482 · Printed marks: 17 · Time: 20 Minutes
Objective · 4484 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 4486 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 4488 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Subjective · psp_4d623a5f090cdb772fec6571a51eaa59 · Printed marks: 68 · Time: 2.40 Hours