Iron, cobalt and metals which are…………
a) Non-magnetic
b) Magnetic
c) insulator
d) none of them
When Robert Boyle suggested the name of element for the basic substances?
a) 1561
b) 1589
c) 1661
d) 1689
When John Dalton suggested that each element was composed of its own kind of particles, which he called………….
a) element
b) atom
c) molecule
d) mixture
Which of the following is used in the preparation of matches due to rapid burning property?
a) phosphorous
b) Carbon
c) Silicon
d) none of these
It is used in glass preparation due to transparent nature of its compounds.
a) phosphorous
b) Carbon
c) Silicon
d) none of these
Which of the following is used as lead in pencils due to its softness and leaving mark on paper surface?
a) phosphorous
b) Carbon
c) Silicon
d) none of these
