BAHAWALPUR BOARD
Chemistry (New Scheme)
Session: 2022 (Group-I / A-2022)
SSC (Part-II)
Class – 10th
New Scheme
Time: 15 Minutes
Marks: 12
Note: Write answers to the questions on the objective answer sheet provided. Four possible answers (A, B, C, & D) to each question are given. Choose the correct answer and fill the corresponding circle (A, B, C, or D) with a marker or pen ink on the answer sheet provided.
1. Reverse Reaction is one:
A) Which proceeds from left to right B) In which reactants react to form product
C) Which speeds up gradually D) Which slows down gradually
2. Stearic Acid is found in:
A) Urine B) Fats C) Apple D) Grapes
3. Coke is:
A) 60% Carbon B) 40% Carbon C) 98% Carbon D) 90% Carbon
4. The General Formula of Ester is:
A) R- O- R B) R- C-R’ C) D) RCHO
5. In the Bromination of Alkenes, the colour is discharged at once due to:
A) Conversion of Triple Bond to Double Bond B) Conversion of Double Bond to Single Bond
C) Conversion of Triple Bond to Single Bond D) Conversion of Single Bond to Double Bond
6. Which one of the following is Tasteless?
A) Cellulose B) Glucose C) Fructose D) Starch
7. Identify which is not a Primary Pollutant:
A) CO₂ B) CO C) SO₂ D) HNO₃
8. Buildings are being damaged by Acid Rain because it attacks:
A) Calcium Sulphate B) Calcium Nitrate C) Calcium Carbonate D) Calcium Oxalate
9. Fish gills clog due to a high concentration of:
A) Lead B) Mercury C) Aluminium D) Chromium
10. The maximum density of water at 4°C is:
A) 1 g/cm³ B) 0.97 g/cm³ C) 1.2 g/cm³ D) 0.973 g/cm³
11. Which of the following gases is used to destroy harmful bacteria in water?
A) Iodine B) Fluorine C) Chlorine D) Bromine
12. Formula of Copper Glance is:
A) CuFeS₂ B) CuS C) Cu₂S D) Cu₃S
BAHAWALPUR 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 parts. (5 x 2 = 10)
- What is Static Equilibrium? Give an example.
- Write two macroscopic characteristics of forward reaction.
- What is the importance of natural gas?
- What is the difference between n-propyl and isopropyl?
- Justify that organic compounds are used as food.
- Compare homocyclic compounds with heterocyclic compounds.
- What is the difference between glucose and fructose?
- How many amino acids are synthesized by the human body?
Write short answers to any five parts. (5 x 2 = 10)
- Briefly describe the formation of petroleum.
- Write the name of any two metallurgical operations.
- Write the name of any two fractions of residual oil.
- Write two uses of fuel oil.
- Write two examples of closed chain hydrocarbons.
- Why are alkanes called paraffins?
- What are complex salts? Give an example.
- Write two uses of magnesium hydroxide.
Write short answers to any five parts. (5 x 2 = 10)
- Write the major sources of CO and CO₂ emissions.
- How does acid rain increase the acidity of soil?
- What threats are there to human health due to SO₂ gas as an air pollutant?
- What is ozone and the ozone hole?
- Why are non-polar compounds insoluble in water?
- What is the function of fertilizers?
- What is fluorosis?
- Why is the use of detergents increasing day by day?
SECTION II
Attempt any two questions. (2 x 9 = 18)
5.
(a) What are proteins? Give any four sources and uses of proteins.
(b) What is the equilibrium constant? How is it helpful in predicting the extent of chemical reaction?
6.
(a) Write down the chemical reactions in the form of balanced equations with NaOH for the following:
- (i) CaCl₂
- (ii) FeSO₄
- (iii) NH₄Cl
- (iv) ZnCl₂
- (v) FeCl₃
(b) Write four effects of water pollution.
7.
(a) Write the raw materials of Solvay’s process. Explain carbonation of ammonical brine and recovery of ammonia.
(b) Write four physical properties of alkynes.