| 101. | Helium is preferred over hydrogen in air balloons because |
A. relatively cheap | |
B. relatively less dense | |
C. relatively high lifting force | |
D. does not form an explosive mixture with air |
| 102. | The gas commonly used in decorative lighting on advertising signboards is |
A. nitrogen | |
B. chlorine | |
C. hydrogen | |
D. Nian |
| 103. | Which gas is usually filled in tube light? |
A. argon and phosphine | |
B. mercury vapor and argon | |
C. argon and methane | |
D. mercury vapor and helium |
| 104. | The gas used in electric bulb is |
A. nitrogen | |
B. hydrogen | |
C. oxygen | |
D. inert gas |
| 105. | To increase the life of an electric bulb it is generally filled with |
A. oxygen | |
B. Wind | |
C. argon | |
D. nitrogen |
| 106. | The most abundant inert gas in the atmosphere is |
A. helium | |
B. Neon | |
C. argon | |
D. krypton |
| 107. | Which Nobel gas is not in the air? |
A. helium | |
B. a gene | |
C. krypton | |
D. radon |
| 108. | Which inert gas can form compounds? |
A. helium | |
B. a gene | |
C. krypton | |
D. argon |
| 109. | Who discovered helium? |
A. cavendish | |
B. to rent | |
C. sheele and priestley | |
D. bargilius |
| 110. | The noble gas used for cancer treatment is |
A. helium | |
B. argon | |
C. krypton | |
D. radon |