McqMate
| Q. |
Helium gas is filled in ballons because |
| A. | its atomic number is 2 |
| B. | it is lighter than air |
| C. | it is one of the constitutents of water |
| D. | it is a noble gas |
| Answer» B. it is lighter than air | |
|
Explanation: Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined. A well-known but minor use is as a lifting gas in balloons and airships |
|
View all MCQs in
ChemistryNo comments yet