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Integrated Science

Unit 1

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Unit 2

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Unit 3

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Quiz

Lesson 1: Light Reflection in Spherical Mirrors and Refraction in Convex and Concave Lenses — Lesson quiz

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  • Questions count: 2
  • Passing grade: 60%
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1.
Which of the following compounds exhibits polar covalent bonding due to a significant difference in electronegativity between 0.4 and 1.7?
Chlorine gas (Cl2)
Methane (CH4)
Sodium chloride (NaCl)
Water (H2O)
2.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
Electrons are moving too rapidly
They contain no electrical charges
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
They decompose in the presence of air
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