Isobars

Isobars is a Science & Technology concept from the MPSC syllabus, tested in 4 past MPSC questions across 4 exam years between 2014 and 2019. Below are those real questions with their correct answers and explanations.

Real questions

Years tested

4 · 2014–2019

In context

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Asked in

2019 2017 2016 2014

Real questions that test this

'अ' गटातील घटकांना 'ब' गटात एकापेक्षा जास्त बरोबर पर्याय उपलब्ध असू शकतात. 'अ' गट 'ब' गट I. 10 इलेक्ट्रॉन्स अ. ²⁰₁₀Ne II. 12 प्रोटॉन्स ब. ²³₁₁Na⁺ III. 12 न्युट्रॉन्स क. ¹⁹₉F⁻ IV. 10 न्युट्रॉन्स ड. ²⁴₁₂Mg²⁺ You may have more than one correct match in Group 'B' for each item in Group 'A'. Group A Group B I. 10 electrons a. ²⁰₁₀Ne II. 12 protons b. ²³₁₁Na⁺ III. 12 neutrons c. ¹⁹₉F⁻ IV. 10 neutrons d. ²⁴₁₂Mg²⁺

1)I - a; II - d; III - b, d; IV - a, c

2)I - a, c; II - d; III - b, d; IV - a

3)I - a, b, c, d; II - d; III - b, d; IV - a, c✓ Correct

4)I - a, b, d; II - d; III - b; IV - a, b, c

Detailed electron, proton, and neutron calculations for Ne, Na+, F-, and Mg2+ match multiple criteria across the groups due to isoelectronic and isotopic relationships.

ऑक्सीजन निसर्गात किती आइसोटोप्स मध्ये आढळतो? / Oxygen occurs in nature in ________ isotopic forms.

1)2

2)3✓ Correct

3)4

4)1

Oxygen occurs naturally in three stable isotopic forms: Oxygen-16, Oxygen-17, and Oxygen-18.

पुढील दोन विधानांपैकी कोणते अयोग्य आहे ? अ. अणु अंक म्हणजे अणु केंद्रातील एकूण प्रोटॉन्सची संख्या. ब. अणु वस्तुमान म्हणजे अणु केंद्रातील एकूण प्रोटॉन्स व न्यूट्रॉन्सची संख्या. Which one of the following statements is/are incorrect ? a. The number of protons in a nucleus is called its atomic number. b. The total number of protons and neutrons constitute its mass number.

(a)अणु अंक म्हणजे अणु केंद्रातील एकूण प्रोटॉन्सची संख्या. / The number of protons in a nucleus is called its atomic number.

(b)अणु वस्तुमान म्हणजे अणु केंद्रातील एकूण प्रोटॉन्स व न्यूट्रॉन्सची संख्या. / The total number of protons and neutrons constitute its mass number.

1)फक्त अ / Only a

2)फक्त ब / Only b

3)दोनों अ आणि ब / Both a and b

4)दोनों नाहीहत / Neither a nor b✓ Correct

Atomic number is indeed defined as the number of protons in the nucleus, and mass number is the sum of protons and neutrons. Both statements are correct, meaning none is incorrect.

ज्या केंद्रभागांचे अणुक्रमांक आणि अणु वस्तुमान विविध असतात, पण न्यूट्रॉनची संख्या समान असेल, तर त्यांना ________ म्हणतात. If nuclides have different atomic numbers and different atomic masses but the same number of neutrons, then they are known as

1)Isotopes

2)Isobars

3)Isotones✓ Correct

4)None of the above

Nuclides with different atomic numbers and mass numbers but the exact same number of neutrons are known as Isotones.

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