About ………… percent elements are metals.
a) 20
b) 40
c) 70
d) 90
Mercury is found is…………
a) solid state
b) gaseous state
c) liquid state
d) all of these
…………is filled in thermometers to measure temperature. NTS PST 24/11/2019 (2:30)
a) Silver
b) water
c) oxygen
d) mercury
The largest component of air is……….
a) Oxygen
b) carbon dioxide
c) hydrogen
d) Nitrogen
Carbon as diamond is used in ……….
a) glasses
b) cars
c) jewelry
d) none of these
Which of the following gases are used in the manufacture of urea?
a) hydrogen
b) nitrogen
c) both a and b
d) none of these
