Choose the correct answer for the following questions about science, and answer the specified number of questions in the second part.

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The question paper contains multiple-choice questions and short answer questions related to science topics for a 10th-grade exam. It appears to cover various subjects within science, including physics, biology, and chemistry.

Answer

1. d) 2. c) 3. c) 4. b) 5. c) 6. a) 7. a) 8. d) 9. d) 10. b) 11. b) 12. d) Part II: Boyle’s law, tungsten, atomicity definition.
  1. Newton’s II law is applicable only for bodies with equal masses. 2. If a substance is heated or cooled, the change in mass of that substance is zero. 3. SI unit of resistance is Ohm. 4. 1 atom of He has the smallest mass. 5. The number of periods and groups in the periodic table are 7, 18. 6. The number of components in binary solutions is 2. 7. Rabbit belongs to Mammals. 8. The wall of the human heart is made of all the above (Endocardium, Epicardium, Myocardium). 9. Bipolar neurons are found in the Retina. 10. The pituitary gland is referred to as the 'Master gland'. 11. Estrogen is secreted by the Primary follicle. 12. Okasaki fragments are joined together by DNA ligase. In Part II:
  2. Boyle’s law states that the pressure of a gas is inversely proportional to its volume at constant temperature. 14. The substance formerly used in bulbs but not in fuses is tungsten. 15. Atomicity defines the total number of atoms in a molecule.
Answer for screen readers
  1. Newton’s II law is applicable only for bodies with equal masses. 2. If a substance is heated or cooled, the change in mass of that substance is zero. 3. SI unit of resistance is Ohm. 4. 1 atom of He has the smallest mass. 5. The number of periods and groups in the periodic table are 7, 18. 6. The number of components in binary solutions is 2. 7. Rabbit belongs to Mammals. 8. The wall of the human heart is made of all the above (Endocardium, Epicardium, Myocardium). 9. Bipolar neurons are found in the Retina. 10. The pituitary gland is referred to as the 'Master gland'. 11. Estrogen is secreted by the Primary follicle. 12. Okasaki fragments are joined together by DNA ligase. In Part II:
  2. Boyle’s law states that the pressure of a gas is inversely proportional to its volume at constant temperature. 14. The substance formerly used in bulbs but not in fuses is tungsten. 15. Atomicity defines the total number of atoms in a molecule.

More Information

Boyle’s law describes how gas volume decreases with increased pressure, critical in understanding gas behavior. Tungsten is used in bulb filaments for high melting point; however, it's not used in fuses, which are designed to melt quickly.

Tips

A common mistake is confusing unit symbols or concepts such as resistance measurement (Ohm) and definitions like atomicity.

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