The hardest substance available on earth is
Platinum
Quartz
gold
Diamond
- Lightening cause rainfall because
- Earth's seasons are caused by which of the following?
- Cell membrane is
- The fastest acting enzyme in the biological kingdom is
- Which of the following parts of the sun is easily visible only during a total solar eclipse?
- Old-written material, which cannot be read easily can be read by
- The property of a substance to absorb moisture from the air on exposure is called
- Brass gets discoloured in air due to the presence of which gas in air
- Epoxy resins is used as
- The marine animal called dugong which is vulnerable to extinction is a/an
- One fathom is equal to
- The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
- The removal of top soil by water or wind is called
- Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
- Which of the following elements is obtained from sea weeds ?
- The formula of Plaster of Paris is
- The major ingredient of leather is
- Permanent hardness of water can be removed by adding
- What is the unit for measuring the pitch or frequency of sound ?
- The metal used in storage batteries
- The oxide of Nitrogen used in medicine as anaesthetic is
- Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
- The metallic constituents of hard water are
- The type of glass used in making prisms and lenses is
- The metal that is present in Photo Films is
- The hardest substance available on earth is
- The recent atomic weight scale is based on
- Bromine is
- The smallest functional and structural unit of kidney is called as
- Glass is made from the mixture of