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NSC Physical Sciences – South Africa

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Question 221

Which gas is primarily responsible for the green color observed in a flame test for copper compounds?
Chemical changeChemical change - Flame tests and ion identificationhard

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Question 222

What is the magnetic field direction inside a long straight current-carrying conductor?
Electricity and magnetismMagnetism - Magnetic fields from currentshard

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Question 223

What is the acceleration of an object in free fall near the Earth's surface, assuming negligible air resistance?
MechanicsMechanics - Motion in one dimensioneasy

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Question 224

A 2 Ω resistor and a 4 Ω resistor are connected in series to a 12 V battery. What is the total current flowing through the circuit?
Electricity and magnetismElectric circuitsmedium

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Question 225

Which type of wave is a sound wave?
Waves and opticsWaves - Types of waveseasy

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Question 226

Which property primarily determines the colour of visible light?
Waves and opticsLight - Properties of lighteasy

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Question 227

Which particle in an atom determines its chemical properties?
Matter and materialsAtomic structure and bondingmedium

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Question 228

What type of reaction is represented by: 2H₂ + O₂ → 2H₂O?
Chemical changeTypes of chemical reactionseasy

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Question 229

Which of the following is a functional group characteristic of alcohols?
Organic chemistryFunctional groupsmedium

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Question 230

When white light passes through a prism, it splits into a spectrum of colours because:
Waves and opticsDispersion of lightmedium

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