| 111. | Inert gases do not react with other elements because – |
A. is a superhuman | |
B. their atomic size is small | |
C. it is not found in abundance | |
D. They have fully coupled permanent cells |
| 112. | Outer orbit of an atom of an inert gas |
A. contains one electron | |
B. has two electrons | |
C. is completed | |
D. has eight electrons |
| 113. | Noble gases are inert because – |
A. their electronic configuration is stable | |
B. they have a higher ionization potential | |
C. both of the above | |
D. none of these |
| 114. | Who is credited with the discovery of inert gases? |
A. priestley | |
B. shutdown | |
C. Sheele | |
D. cavendish |
| 115. | Which of the following gas is used in aeroplane tyres? |
A. hydrogen | |
B. helium | |
C. nitrogen | |
D. Neon |
| 116. | occurs in the nucleus of helium |
A. one proton and two neutrons | |
B. only 1 proton | |
C. two protons and two neutrons | |
D. only two protons |
| 117. | Which of the following is used to fill balloons for meteorological observation? |
A. oxygen | |
B. Carbon dioxide | |
C. methane | |
D. helium |
| 118. | Generally, liquids flow from high to low, which of the following liquids can rise to the top of the glass? |
A. water | |
B. liquid nitrogen | |
C. liquid helium | |
D. petrol |
| 119. | How many electrons are there in the outer orbit of all the other inert gases except Helium? |
A. 6 | |
B. 8 | |
C. 10 | |
D. 18 |
| 120. | While diving in the deep sea divers use a mixture of oxygen and which gas? |
A. hydrogen | |
B. nitrogen | |
C. argon | |
D. helium |