Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q80 (CDS-I/2020) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Match List-I with List-II and select the correct answer using the code given below the Lists: List-I (Name)

Result
Your answer: —  Â·  Correct: A
Explanation

The correct answer is Option (a). This matching is based on the chemical nomenclature and industrial applications of calcium and sodium compounds.

  • A-4 (Bleaching Powder - Calcium oxychloride): Also known as chloride of lime (CaOClâ‚‚), it is produced by the action of chlorine on dry slaked lime and is used widely as a disinfectant and bleaching agent.
  • B-1 (Baking Soda - Sodium hydrogen carbonate): NaHCO₃ is a mild non-corrosive basic salt. It is essential in the food industry for leavening and acts as an antacid.
  • C-2 (Washing Soda - Sodium carbonate): Naâ‚‚CO₃·10Hâ‚‚O is used in glass, soap, and paper industries, and for removing the permanent hardness of water.
  • D-3 (Slaked Lime - Calcium hydroxide): Ca(OH)â‚‚ is formed by the reaction of quicklime with water. It is used in whitewashing, sewage treatment, and neutralizing acidic soil.

Options (b), (c), and (d) are incorrect because they mismatch these specific chemical identities and their corresponding common names.

How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
14%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

NDA-I · 2025 · Q81 Relevance score: 7.58

Match List I with List II and select the answer using the code given below the Lists : List I (Chemical Name) A. Washing soda B. Baking soda C. Bleaching powder D. Gypsum List II (Chemical Formula) 1. CaOCl2 2. NaHCO3 3. Na2CO3-10H2O 4. CaSO4-2H2O Code :

CDS-II · 2017 · Q104 Relevance score: 6.72

Match List-I with List-II and select the correct answer using the code given below the Lists : List-I List-II (Harappan Site) (Modem Name) A. Dholavira 1. Saurashtra B. Rakhigarhi 2. Hisar C. Bhirrana 3. Kadir Island D. Bhogavo 4. Haryana Code :

CDS-II · 2019 · Q26 Relevance score: 6.42

Match List 1 and List II and select the correct answer using the code given below the. lists: List-I(Peak) (I) Anaimudi (II) Doddabette (III) Dhupgarh (IV) Guru Shikhar List II Name of Hill 1 Nilgiri 2 Satpura 3 Aravall 4 Annamalai Code: (I) (II) (III) (IV)

IAS · 1997 · Q42 Relevance score: 6.40

Match List I with List II and select the correct answer by using the code given below the lists :

List I | List II
I. Gupta | (A) Badami
II. Chandella | (B) Panamalai
III. Chalukya | (C) Khajuraho
IV. Pallava | (D) Deogarh

CDS-I · 2010 · Q111 Relevance score: 6.40

Match List-I with List-II and select the correct answer using the code given below the Lists Code

(Item) | (Toxic Substance)
A. CFL lamp | 1. Nitrogen oxides
B.Automobile battery | 2. Phthalates
C. Polymer | 3. Lead
D. Diesel engine | 4. Mercury