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| Q. |
Name the gas which is used in balloons in the place of hydrogen? |
| A. | nitrogen |
| B. | helium |
| C. | neorn |
| D. | argon |
| Answer» B. helium | |
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Explanation: Helium is used in balloons in the place of hydrogen. This is because hydrogen is acombustible gas and when burst can cause skin burns. |
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