UPSC CAPF (AC) 2025 Paper I · Question 104

Question 104 of the UPSC CAPF (AC) 2025 Paper I (3 August 2025). Try it first, then open the answer and explanation.

CAPF 2025 · P-I · Q104 · General Science · Chemistry
Match List-I with List-II and select the answer using the code given below the Lists: List-I (Reaction) List-II (Type of Reaction) A. CH₄ + 2O₂ → CO₂ + 2H₂O + heat and light 1. Combustion B. Mg + H₂SO₄ → MgSO₄ + H₂ 2. Double displacement C. 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O 3. Displacement D. NaCl + AgNO₃ → NaNO₃ + AgCl 4. Neutralization
1. A-1, B-3, C-4, D-2
2. A-1, B-4, C-3, D-2
3. A-2, B-3, C-4, D-1
4. A-2, B-4, C-3, D-1
सूची-I को सूची-II से सुमेलित कीजिए और सूचियों के नीचे दिए गए कूट का प्रयोग कर उत्तर चुनिए : सूची-I (अभिक्रिया) सूची-II (अभिक्रिया का प्रकार) A. CH₄ + 2O₂ → CO₂ + 2H₂O + ऊष्मा और प्रकाश 1. दहन B. Mg + H₂SO₄ → MgSO₄ + H₂ 2. द्विविस्थापन C. 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O 3. विस्थापन D. NaCl + AgNO₃ → NaNO₃ + AgCl 4. उदासीनीकरण
1. A-1, B-3, C-4, D-2
2. A-1, B-4, C-3, D-2
3. A-2, B-3, C-4, D-1
4. A-2, B-4, C-3, D-1
Show answer
Answer: (1) A-1, B-3, C-4, D-2
उत्तर: (1) A-1, B-3, C-4, D-2
Burning methane in oxygen with heat and light is combustion (A-1); the more reactive Mg displaces hydrogen from H₂SO₄ (displacement, B-3); a base reacting with an acid to give salt and water is neutralization (C-4); NaCl and AgNO₃ exchange ions to form a precipitate of AgCl (double displacement, D-2).

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