Deskman Original · RRB Group D
Free RRB Group D Computer Based Test model question paper with 100 questions and 90 minutes, on the official pattern. Download the PDF with answer key and solutions, or attempt it online.
General Science (25) · Mathematics (25) · General Intelligence & Reasoning (30) · General Awareness (20)
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1. Which of the following gases is the primary contributor to the greenhouse effect?
निम्नलिखित गैसों में से कौन सी ग्रीनहाउस प्रभाव का मुख्य कारण है?
Answer: (c) Carbon dioxide traps infrared radiation and is the main greenhouse gas responsible for global warming.
2. What is the oxidation state of sulfur in the compound H₂SO₄?
संयोजन H₂SO₄ में सल्फर का ऑक्सीकरण अवस्था क्या है?
Answer: (c) In H₂SO₄, hydrogen is +1, oxygen is -2; the sum must be zero, giving sulfur an oxidation state of +6.
3. Which part of the human brain regulates body temperature?
मानव मस्तिष्क का कौन सा भाग शरीर का तापमान नियंत्रित करता है?
Answer: (b) The hypothalamus contains the thermoregulatory centre that maintains body temperature.
4. What is the unit of electric resistance?
विद्युत प्रतिरोध की इकाई क्या है?
Answer: (c) Resistance is measured in ohms, symbol Ω, according to Ohm’s law.
5. When a metal oxide reacts with water to form a basic solution, the oxide is classified as:
जब कोई धातु ऑक्साइड पानी के साथ प्रतिक्रिया कर बेसिक घोल बनाता है, तो वह ऑक्साइड किस वर्ग में आता है?
Answer: (a) Amphoteric oxides can react with both acids and bases; when reacting with water they produce a basic solution, e.g., Al₂O₃.
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