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DSSSB TGT Atomicfoundations — practice questions

Explore 2 free Atomicfoundations questions in DSSSB TGT Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Atomicfoundations questions and exercises with answers

Showing questions 1–2 of 2.

In the reaction H₂ + O₂ → H₂O, when the products are weighed, the mass equals:Read the answer and worked solution →When an atom LOSES one or more electrons, it becomes:Read the answer and worked solution →

Worked practice questions

In the reaction H₂ + O₂ → H₂O, when the products are weighed, the mass equals:

  1. Zero
  2. Less than the reactants
  3. Same as the reactants
  4. More than the reactants
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Correct answer: C. Same as the reactants

By the law of conservation of mass, the products weigh exactly the same as the reactants (provided no gas escapes the closed system).

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When an atom LOSES one or more electrons, it becomes:

  1. An anion (negatively charged ion)
  2. A neutron
  3. A cation (positively charged ion)
  4. A molecule
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Correct answer: C. A cation (positively charged ion)

Losing electrons means losing negative charge. With more protons than electrons, the atom becomes net positive — a cation. Conversely, gaining electrons makes it an anion (negative). **Example:** Na → Na⁺ + e⁻ (sodium cation formed by losing 1 electron).

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