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