MPSC PYQ

Neutrons

Neutrons is a Science & Technology concept from the MPSC syllabus, tested in 2 past MPSC questions (2021, 2025). Below are those real questions with their correct answers and explanations.

Real questions
2
Years tested
2 · 2021–2025
In context
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Real questions that test this

खालील विधानें पहा : / Consider the following statements :

(a)अणू हा विद्युतभार दृष्ट्या उदासीन असतो. / An atom is electrically neutral.

(b)केंद्राभोवती फिरणाऱ्या सर्व इलेक्ट्रॉन्सचा ऋण विद्युतभार व केंद्रानावरील ऋण भार समान असतो. / The negative charge on nucleus is equal to the total negative charge of all the orbiting electrons.

1)दोनही चूक / Both are incorrect
2)दोनही बरोबर / Both are correct
3)(a) बरोबर, (b) चूक / (a) correct, (b) incorrect✓ Correct
4)(a) चूक, (b) बरोबर / (a) incorrect, (b) correct

An atom is electrically neutral because the positive charge on its nucleus equals the total negative charge of all orbiting electrons, making statement (a) correct and statement (b) incorrect since the nuclear charge is positive, not negative.

हायड्रोजनचे समस्थानिके आणि त्यांचे अनुक्रमे वस्तुमान गुणोत्तर ________ आहे. The isotopes of hydrogen and their respective mass ratio are ________.

1)(1) ड्युटेरियम, प्रोटियम, ट्रिटियम; 1 : 2 : 3 (1) Deuterium, Protium, Tritium; 1 : 2 : 3
2)(2) ट्रिटियम, ड्युटेरियम, प्रोटियम; 2 : 3 : 1 (2) Tritium, Deuterium, Protium; 2 : 3 : 1
3)(3) ट्रिटियम, प्रोटियम, ड्युटेरियम; 2 : 3 : 1 (3) Tritium, Protium, Deuterium; 2 : 3 : 1
4)(4) प्रोटियम, ड्युटेरियम, ट्रिटियम; 1 : 2 : 3 (4) Protium, Deuterium, Tritium; 1 : 2 : 3✓ Correct

The isotopes of hydrogen are Protium, Deuterium, and Tritium, with mass numbers 1, 2, and 3 respectively, giving a mass ratio of 1 : 2 : 3.

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