BISE Multan · Class 11 · Chemistry

BISE Multan · Class 11 · Chemistry · 2026 · First Annual · Group 1 · Old course

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: 6481 · Printed marks: 17 · Time: 20 Minutes

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.

OBJECTIVE

Q1(1)
$27 g$ of $A l$ will react completely with how much mass of $O_{2}$ to produce $A l_{2} O_{3}$ :
- (A)
  $8 g$ of oxygen
- (B)
  $16 g$ of oxygen
- (C)
  $32 g$ of oxygen
- (D)
  $24 g$ of oxygen
Q1(2)
The number of isotopes of nickel are:
- (A)
  5
- (B)
  7
- (C)
  6
- (D)
  3
Q1(3)
Paper chromatography is a technique of:
- (A)
  Thin layer chromatography
- (B)
  Partition chromatography
- (C)
  Adsorption chromatography
- (D)
  Gas chromatography
Q1(4)
The molar volume of $C O_{2}$ is maximum at:
- (A)
  $273^{\circ} C$ and $2 a t m$
- (B)
  STP
- (C)
  $0^{\circ} C$ and $2 a t m$
- (D)
  $127^{\circ} C$ and $1 a t m$
Q1(5)
A real gas obeying van der Waals equation will resemble ideal gas if:
- (A)
  Both `a' and `b' are small
- (B)
  Both `a' and `b' are large
- (C)
  `a' is small `b' is large
- (D)
  `a' is large `b' is small
Q1(6)
$N H_{3}$ shows a maximum boiling point among the hydrides of $V^{t h}$ group elements due to:
- (A)
  Very small size of nitrogen
- (B)
  Lone pair of electrons present on nitrogen
- (C)
  Enhanced electronegative character of nitrogen
- (D)
  Pyramidal structure of $N H_{3}$
Q1(7)
The molecules of $C O_{2}$ in dry ice form:
- (A)
  Ionic crystal
- (B)
  Covalent crystal
- (C)
  Any type of crystal
- (D)
  Molecular crystal
Q1(8)
Orbitals having same energy are called:
- (A)
  Hybrid orbitals
- (B)
  Valence orbitals
- (C)
  Degenerate orbitals
- (D)
  f-orbitals
Q1(9)
Splitting of spectral lines when atoms are subjected to strong electric field is called:
- (A)
  Zeeman effect
- (B)
  Stark effect
- (C)
  Photoelectric effect
- (D)
  Compton effect
Q1(10)
Which of the given molecules has zero dipole moment:
- (A)
  $N H_{3}$
- (B)
  $C H C l_{3}$
- (C)
  $H_{2} O$
- (D)
  $B F_{3}$
Q1(11)
The bond length of $C - C$ bond in ethane is:
- (A)
  $154 p m$
- (B)
  $133 p m$
- (C)
  $120 p m$
- (D)
  $110 p m$
Q1(12)
If an endothermic reaction is allowed to takes place very rapidly in the air, the temperature of surrounding air:
- (A)
  Remains constant
- (B)
  Increases
- (C)
  Decreases
- (D)
  Remains unchanged
Q1(13)
The $K_{s p}$ value of $P b S O_{4}$ is:
- (A)
  $1.69 \times 10^{- 8}$
- (B)
  $1.96 \times 10^{- 10}$
- (C)
  $1.35 \times 10^{- 5}$
- (D)
  $3.2 \times 10^{- 11}$
Q1(14)
The sum of $p K_{a}$ and $p K_{b}$ at $25^{\circ} C$ is:
- (A)
  7
- (B)
  14
- (C)
  $10^{- 7}$
- (D)
  $10^{7}$
Q1(15)
A solution of glucose is $10 % w / v$ , the volume in which its $1$ gm mole is dissolved will be:
- (A)
  $1 d m^{3}$
- (B)
  $1.8 d m^{3}$
- (C)
  $200 c m^{3}$
- (D)
  $900 c m^{3}$
Q1(16)
If a strip of $C u$ metal is placed in a solution of $F e S O_{4}$ :
- (A)
  $C u$ will be deposited
- (B)
  $F e$ is precipitated out
- (C)
  $C u$ and $F e$ both dissolve
- (D)
  No reaction takes place
Q1(17)
The rate of reaction:
- (A)
  Increases as the reaction proceeds
- (B)
  Decreases as the reaction proceeds
- (C)
  Remains the same as the reaction proceeds
- (D)
  May decrease or increase as the reaction proceeds

Subjective

Source code: 21(O) · Printed marks: 68 · Time: 2.40 Hours

Write same question number and its parts number on answer book, as given in the question paper.
Q2: Write answers of any eight parts. 8 × 2 = 16.
Q3: Write answers of any eight parts. 8 × 2 = 16.
Q4: Write answers of any six parts. 6 × 2 = 12.
Section-II: Write answers of any three questions. 3 × 8 = 24.

SECTION-I

2
Write answers of any eight parts.
Q2(i)
Define relative atomic mass and isotope.
(2 marks)
Q2(ii)
Many chemical reactions taking place in our surroundings involve limiting reactant. Comment on any one.
(2 marks)
Q2(iii)
What is Stoichiometry? What are its two assumptions?
(2 marks)
Q2(iv)
How can rate of filtration be increased?
(2 marks)
Q2(v)
What is chromatography? Write its two uses.
(2 marks)
Q2(vi)
What is Dalton's law and partial pressure?
(2 marks)
Q2(vii)
Differentiate between diffusion and effusion.
(2 marks)
Q2(viii)
What is Joule-Thomson effect?
(2 marks)
Q2(ix)
What is galvanic cell?
(2 marks)
Q2(x)
How anodized aluminum is prepared?
(2 marks)
Q2(xi)
What is rate determining step?
(2 marks)
Q2(xii)
What is catalytic poisoning?
(2 marks)
3
Write answers of any eight parts.
Q3(i)
Evaporation causes cooling. Give reason.
(2 marks)
Q3(ii)
Heat of sublimation of iodine is very high. Why?
(2 marks)
Q3(iii)
Differentiate between crystalline and amorphous solids.
(2 marks)
Q3(iv)
Define Allotropy. Give an example.
(2 marks)
Q3(v)
Why are the +ve rays called canal rays?
(2 marks)
Q3(vi)
Give two postulates of Planck's Quantum Theory.
(2 marks)
Q3(vii)
What is Zeeman's effect?
(2 marks)
Q3(viii)
State $n + ℓ$ rule.
(2 marks)
Q3(ix)
Define common ion effect. Give example.
(2 marks)
Q3(x)
What are acidic buffer. Give example.
(2 marks)
Q3(xi)
Write down $K_{c}$ units for the given reaction: $P C l_{5} ⇌ P C l_{3} + C l_{2}$
(2 marks)
Q3(xii)
Discuss effect of pressure change on reaction $2 S O_{2} + O_{2} ⇌ 2 S O_{3}$
(2 marks)
4
Write answers of any six parts.
Q4(i)
What is co-ordinate covalent bond?
(2 marks)
Q4(ii)
Draw the structure of $H_{2} O$ and $N H_{3}$ with respect to VSEPR theory.
(2 marks)
Q4(iii)
Define Covalent bond. Give two examples.
(2 marks)
Q4(iv)
Discuss Orbital Hybridization.
(2 marks)
Q4(v)
State thermochemical reaction with one example.
(2 marks)
Q4(vi)
Differentiate between system and surrounding.
(2 marks)
Q4(vii)
What are non-ideal solutions? Give one example?
(2 marks)
Q4(viii)
Define parts per million, PPM, in chemical solutions.
(2 marks)
Q4(ix)
How would you define molarity? Give one example.
(2 marks)

SECTION-II

Write answers of any three questions.

Q5(a)
A sample of liquid consisting of carbon, hydrogen and oxygen was subjected to combustion analysis. $0.5439 g$ of the compound gave $1.039 g$ of $C O_{2}$ , $0.6369 g$ of $H_{2} O$ . Determine the empirical formula of the compound.
(4 marks)
Q5(b)
Define vapour pressure. Write a method for determination of vapour pressure of a liquid.
(4 marks)
Q6(a)
What is Plasma? Give it application in daily life.
(4 marks)
Q6(b)
Discuss Chadwick's experiment for the discovery of neutron. Write down it properties.
(4 marks)
Q7(a)
Define Bond order. Discuss $N_{2}$ molecule on the basis of MOT.
(4 marks)
Q7(b)
Explain the construction and working of glass calorimeter.
(4 marks)
Q8(a)
Define electrolytic process and give electrolysis of aqueous sodium chloride solution.
(4 marks)
Q8(b)
The given reaction was allowed to reach the state of equilibrium $2 A_{a q} + B_{a q} ⇌ C_{a q}$ . The initial amounts of the reactants present in $1 d m^{3}$ of solution were $0.50$ mole of A, $0.60$ mole of B. At equilibrium, the amounts were $0.20$ mole of A and $0.45$ mole of B and $0.15$ mole of C. Calculate the $K_{c}$ .
(4 marks)
Q9(a)
Define solubility curve. Explain different types of solubility curves with the help of graph.
(4 marks)
Q9(b)
Explain half-life method and method of large excess to find out order of reaction.
(4 marks)

Original source references (5)

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

Objective · 6481 · Printed marks: 17 · Time: 20 Minutes
Objective · 6483 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 6485 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 6487 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Subjective · 21(O) · Printed marks: 68 · Time: 2.40 Hours