Bromine is a___________________?

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1. Which of the following does not pollute the air?

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2. How long does the earth take to cover 1° longitude?

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3. As a result of which treaty, ozone hole in Antarctica is slowly healing?

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4. Eletromagneticism is the branch of___________?

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5. Study of joints called:

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6. Which of the following letter does not represent in periodic table?

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7. The unit to measure the quantity of Ozone in atmosphere is ?

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8. What is the molecular weight of Ammonia (NH3) ________ ?

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9. The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is ________ ?

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10. Blood sugar is measured in:

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