SSC CGL Science – Chemistry in Everyday Life – Level 1 · Warm-up · Tier I Level

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SSC CGL Science – Chemistry in Everyday Life – Level 1 · Warm-up · Tier I Level – 12 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.  
Heavy water is:

Correct Answer: A [D₂O]

Explanation:

Heavy water is deuterium oxide, D₂O (D = ²H).

2.  
Penicillin was discovered by:

Correct Answer: B [Alexander Fleming]

Explanation:

Answer: Alexander Fleming. Fleming, 1928.

3.  
Soaps are sodium or potassium salts of:

Correct Answer: D [long-chain fatty acids]

Explanation:

Soaps are Na/K salts of long-chain fatty (carboxylic) acids; sulphonic-acid salts are detergents.

4.  
Temporary hardness of water is due to:

Correct Answer: C [hydrogencarbonates of calcium and magnesium]

Explanation:

Answer: hydrogencarbonates of calcium and magnesium. Boil the Bi.

5.  
Which glass is used for laboratory ware that must withstand sudden heating?

Correct Answer: C [Borosilicate (Pyrex) glass]

Explanation:

Boron oxide gives low thermal expansion.

6.  
Gypsum is added to cement to:

Correct Answer: B [slow down its setting]

Explanation:

It regulates the setting time.

7.  
The chemical name of Epsom salt is:

Correct Answer: D [magnesium sulphate heptahydrate]

Explanation:

Answer: magnesium sulphate heptahydrate. MgSO₄·7H₂O.

8.  
Which fertiliser has the highest percentage of nitrogen?

Correct Answer: A [Urea]

Explanation:

Answer: Urea. 46.67% N.

9.  
A medicine used to reduce fever is called an:

Correct Answer: A [antipyretic]

Explanation:

Answer: antipyretic. Pyrexia = fever.

10.  
Blue vitriol is:

Correct Answer: B [copper sulphate]

Explanation:

Answer: copper sulphate. Vitriol Colour Code.

11.  
Fill in the blankManganese dioxide gives glass a ___ colour.

Correct Answer: D [violet]

Explanation:

Manganese makes it mauve (violet).

12.  
Diagram-basedIn the soap molecule shown, which part dissolves in oil and grease?

Correct Answer: C [Y – the hydrocarbon tail]

Explanation:

The long hydrocarbon tail (Y) is hydrophobic and dissolves in oil; the head (X) stays in water.

➤ 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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