The colors in fireworks are produced by the combustion of different metal salts. When heated, these salts emit specific colors. For example, strontium salts produce red, copper compounds generate blue, sodium salts give off yellow, and barium salts result in green.
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MCQs
1. Which element is responsible for making green colors in fireworks?
A) Barium
B) Potassium
C) Carbon
D) Aluminum
Answer: A) Barium
Explanation: Barium salts are used to create green colors in fireworks. When barium is heated, it emits a green light.
2. What color does copper produce in fireworks?
A) Blue
B) Yellow
C) Red
D) Green
Answer: A) Blue
Explanation: Copper compounds produce blue colors when heated in fireworks. The copper ions emit blue light at high temperatures.
3. Which chemical is used to produce gold or yellow sparks in fireworks??
A) Sodium
B) Calcium
C) Iron
D) Zinc
Answer: A) Sodium
Explanation: Sodium salts are used to produce bright yellow or gold colors in fireworks. Sodium emits a strong yellow light when it is heated.
4. To make fireworks sparkle, which substance is often added?
A) Magnesium
B) Phosphorus
C) Sulfur
D) Charcoal
Answer: A) Magnesium
Explanation: Magnesium is added to fireworks to create a sparkling effect. It burns brightly and adds white sparks to the fireworks.
5. What does potassium nitrate do in fireworks?
A) Creates colors
B) Acts as a binder
C) Produces smoke
D) Works as an oxidizer
Answer: D) Works as an oxidizer
Explanation: Potassium nitrate is an oxidizer in fireworks. It provides the oxygen that allows the fireworks to burn in the air.
6. Which element is not typically used to create colors in fireworks?
A) Strontium
B) Barium
C) Copper
D) Uranium
Answer: D) Uranium
Explanation: Uranium is not used in fireworks due to its radioactivity and the dangers associated with it. The other elements listed are common for creating colors.
7. Which of the following is commonly used for bright white light in fireworks??
A) Aluminum
B) Sodium
C) Barium
D) Copper
Answer: A) Aluminum
Explanation: Aluminum or magnesium powders are used in fireworks to produce bright white lights. When they burn, they generate intense white sparks.
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