IGCSE O Level Chemistry Practice Test 157
Exothermic Reactions Quiz Questions and Answers PDF Download - 157
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Exothermic Reactions Questions and Answers PDF Download: MCQ 157
In ionic crystals, heat energy is taken in to
- forming carbonates
- forming Sulphates
- breaking crystal lattices
- forming covalent bonds
Polarization refers to the
- prevention of electricity flowing in the electrolyte solution
- rapid dissolving of magnesium in dilute acid
- slow dissolving of magnesium in conc. Acid
- electricity flowing in the electrolyte solution
The only covalent molecule conducting electricity is
- helium
- selenium
- mercury
- graphite
Ionic compounds are
- soluble in water only
- good conductors of electricity if in molten state only
- bad conductors of electricity
- soluble in water and good conductors of electricity if in molten state
In Universal indicators, a pH of 11 to 14 is indicated through
- turquoise color
- violet color
- blue color
- light violet color
IGCSE O Level Chemistry Exam Prep Tests
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