Which of the following is an element?
Which of the following are the ingredients of gun metal?
The group of metals Fe, Co, Ni may best called as
Marsh gas is
Washing soda is the common name for
Which of the following is the lightest metal?
The average salinity of sea water is
Which metal pollute the air of a big city?
Non stick cooking utensils are coated with
Which of the following is used as a lubricant?
Most soluble in water is
Diamond is an allotropic form of
From which mineral is radium obtained?
Heavy water is
LPG consists of mainly
Quartz crystals normally used in quartz clocks etc. is chemically
Bell metal is an alloy of
Monazite is an ore of
Air is a/an
Which of the gas is not known as green house gas?
Carbon, diamond and graphite are together called