GUJRANWALA BOARD
Chemistry (New Scheme)
(Session: 2022)
(Group-I / A-2022)
SSC (Part-II)
Class – 10th
New Scheme
Time: 15 Minutes
(OBJECTIVE)
Marks: 12

Note: Write answers to the questions on the objective answer sheet provided. Four possible answers A, B, C & D are given for each question. Fill the circle corresponding to the correct answer (A, B, C, or D) with a marker or pen on the answer sheet provided.

1. Water dissolves non-ionic compounds because of:
A) Ion-ion forces  B) Ion-dipole forces  C) Dipole-dipole forces  D) Hydrogen bonding

2. ______ pollutant is not found in car exhaust fumes:
A) CO  B) O₃  C) NO₂  D) SO₂

3. Deficiency of Vitamin D causes:
A) Rickets  B) Scurvy  C) Anemia in babies  D) Night blindness

4. For a reaction between PCl₅ and Cl₂ to form PCl₅, the units of Kc are:
A) mol dm⁻³  B) mol⁻¹ dm³  C) mol dm³  D) mol⁻¹ dm⁻³

5. ______ is a synthetic fiber:
A) Cotton  B) Wool  C) Nylon  D) Silk

6. Infrared radiations emitted by the earth are absorbed by:
A) CO₂ & H₂O  B) O₂, N₂  C) CO₂ & N₂  D) O₃ & CO₂

7. Pitch is a black residue of:
A) Coke  B) Coal tar  C) Coal  D) Coal gas

8. ______ salt makes water permanently hard:
A) Na₂CO₃  B) NaHCO₃  C) Ca(HCO₃)₂  D) CaSO₄

9. ______ is not composed of salt:
A) A metallic cation  B) A non-metallic anion  C) An anion of a base  D) An anion of an acid

10. ______ is a saturated hydrocarbon:
A) C₂H₄  B) C₃H₆  C) C₄H₁₀  D) C₅H₁₂

11. ______ is not a fraction of petroleum:
A) Kerosene oil  B) Diesel oil  C) Alcohol  D) Petrol

12. ______ is a secondary pollutant:
A) Nitric acid  B) Ammonia  C) Oxides of nitrogen  D) Oxides of sulfur

GUJRANWALA BOARD
SSC (Part-II)
(Session: 2022)
(Group-I / A-2022)
Class – 10th
New Scheme
Time: 1:45 Hours
Marks: 48

Note:

Section I is compulsory. Attempt any Two questions from Section II (subjective part).

SECTION-I

Write short answers to any Five (5) of the following parts.
(5×2 = 10)

1. Write down the equilibrium constant expressions for the following reactions:
   (a) PCl₅ + Cl₂ → PCl₃
   (b) 2SO₂ + O₂ → 2SO₃
2. Define dynamic equilibrium state.
3. Justify that organic compounds are used as food.
4. Explain the different radicals of propane.
5. Define functional group and give one example.
6. Define pitch and give its use.
7. Write down the general formula of amino acids.
8. What do you mean by the genetic code of life?

Write short answers to any Five (5) of the following parts.

(5×2 = 10)

1. A solution of hydrochloric acid is 0.01 M. What is its pH?
2. Na₂SO₄ is a neutral salt. Write down its two uses.
3. What are closed chain compounds of hydrocarbons? Give an example.
4. How can you prepare acetylene from tetrachloroethane?
5. What is the principle of fractional distillation?
6. What is meant by calcination? Write down a balanced chemical equation to justify your answer.
7. Define ores.
8. How is the concentration of ores carried out by electromagnetic separation?

Write short answers to any Five (5) of the following parts.

(5×2 = 10)

1. Why does temperature gradually rise in the stratosphere?
2. Comment: “The earth would have been uninhabitable without CO₂.”
3. Why are catalytic converters used in automobiles?
4. Write down two sources of sulfur compounds.
5. What is the function of fertilizers?
6. Why is the use of detergents increasing day by day?
7. What is industrial waste?
8. Describe the important components of domestic sewage.

SUBJECTIVE PART-II

Attempt any Two (2) questions.

5.
(a) Give the importance of vitamins.
(b) Write down any four macroscopic characteristics of dynamic equilibrium.

6.
(a) Define Lewis acid and Lewis base. Explain the Lewis concept of acids and bases with examples.
(b) Describe four effects of using polluted water.

7.
(a) What is the percentage of nitrogen in urea? Give any four important uses of urea in agriculture.
(b) Give any four uses of ethane in everyday life.