RRB Technician (Grade I Signal + Grade III) 2026 · Question 236 of 265

If two isotopes of an element ‘X’ are X-35 and X-37, the average atomic mass of chlorine (if X-35 = 25% and X-37 = 75%) will be:

A35.5 u
B36.0 u
C34.5 u
D36.5 uCorrect

Answer: D. 36.5 u

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Source: RRB Technician Grade III 10-Mar-2026 Shift 3 (oliveboard compilation with answer key) · reliable-secondary

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RRB Technician (Grade I Signal + Grade III) 2026 Q236: If two isotopes of an element ‘X’ are X-35 and X-37, the average atomic mass of chlorine (if X-35 = 25% and X-37 = 75%)… | PYQPulse | PYQPulse