Which of the following is the most second abundant element in the universe?
a) helium
b) hydrogen
c) aluminum
d) none of these
Which of the following is a member of the noble gas family?
a) hydrogen
b) helium
c) carbon
d) oxygen
A very light and inert gas is
a) oxygen
b) hydrogen
c) helium
d) neon
Nobel gases are also called the………..
a) action gases
b) inert gases
c) silent gas
d) none of these
Which of the
following lighter than air:
a) helium
b) hydrogen
c) both a and b
c) none of the
A ductile element which is a good conductor of electricity is called………….
a) copper
b) rubber
c) glass
d) sand
