SSC CGL Science – Chemistry in Everyday Life – Level 2 · Exam Level · Tier I Sprint

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SSC CGL Science – Chemistry in Everyday Life – Level 2 · Exam Level · Tier I Sprint – 15 questions, subject: General Science. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
Match the followingMatch the chemical with its common name:
P. AgNO₃ Q. Pb₃O₄ R. Hg₂Cl₂
1. Calomel 2. Lunar caustic 3. Red lead

Correct Answer: D [P-2, Q-3, R-1]

Explanation:

Lunar caustic AgNO₃; red lead Pb₃O₄; calomel Hg₂Cl₂.

2.  
Permanent hardness of water can be removed by adding:

Correct Answer: C [washing soda]

Explanation:

CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl.

3.  
Odd one outOdd one out (by type of medicine):

Correct Answer: B [Penicillin]

Explanation:

Penicillin is an antibiotic; the others are analgesics.

4.  
The artificial sweetener sucralose is a chlorine derivative of:

Correct Answer: A [sucrose]

Explanation:

Sucralose is a trichloro derivative of sucrose and is stable on heating.

5.  
Assertion–Reason
A: Detergents can be used for washing in hard water.
R: The calcium and magnesium salts of detergents are soluble in water.

Correct Answer: A [Both A and R are true and R explains A]

Explanation:

Answer: Both A and R are true and R explains A. No scum forms.

6.  
Dettol is a mixture of:

Correct Answer: B [chloroxylenol and terpineol]

Explanation:

Answer: chloroxylenol and terpineol. Standard composition.

7.  
Which is used as a food preservative?

Correct Answer: C [Sodium benzoate]

Explanation:

Sodium benzoate in sauces and jams; the others are not food preservatives.

8.  
True/false countHow many of these statements are true?
I. Antibiotics do not cure viral diseases.
II. 1% phenol is used as an antiseptic.
III. Aspirin also prevents blood clotting.
IV. Antacids neutralise excess stomach acid.

Correct Answer: D [3]

Explanation:

II is false: 1% phenol is a disinfectant; 0.2% is the antiseptic.

9.  
Spot My Mistake“Green vitriol is ZnSO₄·7H₂O, used in making ink.” The correct formula of green vitriol is:

Correct Answer: C [FeSO₄·7H₂O]

Explanation:

Green vitriol is ferrous sulphate; ZnSO₄·7H₂O is white vitriol.

10.  
Ammonia is manufactured by the Haber process using the catalyst:

Correct Answer: D [iron (iron oxide with promoters)]

Explanation:

Pt – Ostwald; V₂O₅ – contact process; Ni – hydrogenation.

11.  
The percentage of nitrogen in ammonium chloride (NH₄Cl; N = 14, H = 1, Cl = 35.5) is about:

Correct Answer: A [26.17%]

Explanation:

Answer: 26.17%. 14 ÷ 53.5 × 100 ≈ 26.17%.

12.  
Two-quantity comparison
Quantity I: formula mass of Glauber's salt, Na₂SO₄·10H₂O
Quantity II: formula mass of borax, Na₂B₄O₇·10H₂O

Correct Answer: B [Quantity I < Quantity II]

Explanation:

Answer: Quantity I < Quantity II. 322 < 382.

13.  
Which compound is used to etch designs on glass?

Correct Answer: D [Hydrofluoric acid]

Explanation:

Answer: Hydrofluoric acid. HF attacks silica.

14.  
Sulphuric acid is manufactured by the:

Correct Answer: C [contact process]

Explanation:

Answer: contact process. SO₂ → SO₃ over V₂O₅.

15.  
Fill in the blankIn a soap micelle, the ___ ends of the molecules face the water.

Correct Answer: B [ionic (hydrophilic)]

Explanation:

Answer: ionic (hydrophilic). Head in Water, Tail in Oil.

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 General Science book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-general-science

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