RRB Technician Grade 3 previous year question
Identify the product formed when copper metal is exposed to dilute hydrochloric acid.
Asked in RRB Technician Grade 3 (10 Mar 2026 Shift 3) · Science
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Correct answer: (C) No reaction
Copper lies below hydrogen in the reactivity series, so it cannot displace hydrogen from dilute HCl; hence no reaction occurs.
हिंदी में प्रश्न
जब ताम्र धातु को तनु हाइड्रोक्लोरिक अम्ल के संपर्क में लाया जाता है, तो बनने वाले उत्पाद की पहचान कीजिए।
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (C) कोई अभिक्रिया नहीं
कॉपर सक्रियता श्रेणी में हाइड्रोजन से नीचे है, इसलिए यह तनु HCl से हाइड्रोजन को विस्थापित नहीं कर सकता; अतः कोई अभिक्रिया नहीं होती।
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