RRB Technician Grade 3 previous year question
What is the formula unit mass of sodium carbonate (Na2CO3)? (Atomic masses: Na = 23 u, C = 12 u, O = 16 u)
Asked in RRB Technician Grade 3 (06 Mar 2026 Shift 3) · Science
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Correct answer: (D) 106 u
Formula unit mass of Na2CO3 = 2(23) + 12 + 3(16) = 46 + 12 + 48 = 106 u.
हिंदी में प्रश्न
सोडियम कार्बोनेट (Na2CO3) का सूत्र इकाई द्रव्यमान कितना है? (परमाणु द्रव्यमान: Na = 23 u, C = 12 u, O = 16 u)
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सही उत्तर: (D) 106 u
Na2CO3 की सूत्र इकाई द्रव्यमान = 2(23) + 12 + 3(16) = 46 + 12 + 48 = 106 u.
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