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This is a timed quiz. You will be given 15 seconds per question. Are you ready?
15
In fireworks, the green flame is produced because of?
Correct!
Wrong!
Permanent hardness of water may be removed by the addition of ?
Correct!
Wrong!
Which of the following was to be discovered first in the chromospheres of the sun?
Correct!
Wrong!
Non stick cooking utensils are coated with?
Correct!
Wrong!
Air is a/an?
Correct!
Wrong!
Which of the following are the ingredients of gun metal?
Correct!
Wrong!
Which metal pollute the air of a big city?
Correct!
Wrong!
Actinides are the elements with atomic numbers from?
Correct!
Wrong!
Science Quiz 140
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