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CHEMISTRY (Part-V) (Railway)

📆 April 10, 2025

Total Questions: 30

1. Which of the following chemical reactions represents the chlor-alkali process? [RRB Group 'D' CBT Exam, 18.08.2022 Shift-III]

Correct Answer: (3) 2 NaCl (aq) + 2 H₂O(l) → 2 NaOH (aq) + Cl₂ (g) + H₂ (g)

2. A magnesium ribbon burns with a dazzling flame in air (oxygen) and changes into a white substance 'X'. The X is: [RRB Group 'D' CBT Exam, 18.08.2022 Shift-III]

Correct Answer: (4) MgO

3. Which of the following has the largest atomic radius? [RRB Group D' CBT Exam, 18.08 2022 (Shift-III)]

Correct Answer: (3) lodine

4. Carbon is able to form stable compounds because of: [RRB Group 'D' CBT Exam, 18.08.2022 (Shift-III)]

Correct Answer: (3) its smaller atomic size

5. Compounds C₂H₆ and C₃H₈ are differ by ________ unit and belong to_________ series.

Correct Answer: (4) CH₂ homologous

6. _________ aid (s) in the emulsification of fat. [RRB Group 'D' CBT Exam, 18.08.2022 (Shift-III)]

Correct Answer: (1) Bile salts

7. What happens when sodium metal reacts with water? [RRB Group 'D' CBT Exam, 18.08.2022 (Shift-III)]

Correct Answer: (4) Hydrogen gas sodium hydroxide solution are pro-duced.

8. Alcohols react with sodium leading to the evolution of which of the following gases? [RRB Group 'D' CBT Exam, 22.08.2022 (Shift-I)]

Correct Answer: (4) Hydrogen

9. In the given chemical reac-tion, which of the following chemical species acts as an oxidising agent and as a reducing agent, respectively? [RRB Group D CBT Exam, 22.08.2022 (Shift-I)]

2Al + Fe₂O₃ → Al₂O₃ + 2Fe

Correct Answer: (3) Fe₂O₃ and Al

10. Which among the following groups of elements has the tendency to make acidic oxide? [RRB Group 'D' CBT Exam, 22.08.2022 (Shift-I)]

Correct Answer: (2) 16

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