SSC CGL Science – Metals, Non-Metals & Metallurgy – Tier II Level · Marathon

← Back

SSC CGL Science – Metals, Non-Metals & Metallurgy – Tier II Level · Marathon – 10 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.

Get daily current affairs & exam alerts – follow us YouTube WhatsApp Channel Telegram Channel Facebook Page Instagram
Share with friends & study groups
Link to this page from your website / blog (HTML code)
1.  
Zone refining is used to obtain very pure:

Correct Answer: D [silicon and germanium]

Explanation:

Impurities stay in the molten zone – semiconductor-grade metals.

2.  
The Mond process is used to refine:

Correct Answer: B [nickel]

Explanation:

Ni + 4CO → Ni(CO)₄ (volatile).

3.  
The van Arkel method is used to purify:

Correct Answer: C [zirconium and titanium]

Explanation:

Volatile iodide decomposes on a hot filament.

4.  
Liquation is used to refine:

Correct Answer: D [tin]

Explanation:

Easily melted tin flows away from impurities.

5.  
Distillation is a suitable refining method for:

Correct Answer: A [zinc and mercury]

Explanation:

Answer: zinc and mercury. Low-boiling metals.

6.  
The charge needed to deposit 1 mole (27 g) of aluminium from Al³⁺ is:

Correct Answer: B [289,500 C]

Explanation:

3 electrons per Al³⁺ → 3 × 96,500 C.

7.  
The mass of copper deposited by 1 faraday from Cu²⁺ (Cu = 63.5) is:

Correct Answer: D [31.75 g]

Explanation:

Answer: 31.75 g. 63.5 ÷ 2 = 31.75 g.

8.  
The percentage of aluminium in pure alumina, Al₂O₃ (Al = 27, O = 16), is about:

Correct Answer: C [52.9%]

Explanation:

Answer: 52.9%. 54 ÷ 102 × 100 ≈ 52.9%.

9.  
The mass of pure gold in a 15 g chain of 18-carat gold is:

Correct Answer: A [11.25 g]

Explanation:

15 × 18/24 = 15 × 0.75 = 11.25 g.

10.  
Two-quantity comparison
Quantity I: mass of pure gold in 12 g of 22-carat gold
Quantity II: 11 g

Correct Answer: B [Quantity I = Quantity II]

Explanation:

Answer: Quantity I = Quantity II. 12 × 22/24 = 11 g.

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

📘 SSC CGL 2026 – General Science (Tier I + Tier II)
Here you get the answer with a one-line explanation. 1,110 original questions with answer key and explanations · mind-maps, notes, tables and shortcuts · Tier I and Tier II practice sets + 3 mock tests
Get the book – ₹149 ₹299 →
Score: 0 Answered: 0 / 0