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Free gk questions Online Test - MeritNotes
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No. of Questions :10
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1. What are neutrons?
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2. What is meant by mass number?
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3. Define atomic number?
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4. An atom is neutral. Why?
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5. What are electrons?
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6. Define valency of an element?
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7. Define atom?
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8. Mention the uses of isotopes?
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9. What are protons?
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10. What are isotopes?
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