Which of the following elements is obtained from sea weeds ?
Argon
Vanadium
Iodine
Sulphur
- One fathom is equal to
- Which of the following is commonly called a polyamide ?
- The fastest-running terrestrial animal is
- 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?
- The location and energy of an electron in an atom can be specified by
- Which of the following is in liquid form at room temperature ?
- Glass is made from the mixture of
- Which of the following elements is a metal
- Polythene is industrially prepared by the polymerisation of
- Nitrification means
- The marine animal called dugong which is vulnerable to extinction is a/an
- Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
- The oxide of Nitrogen used in medicine as anaesthetic is
- The hardest substance available on earth is
- Old-written material, which cannot be read easily can be read by
- Which of the following is the lightest metal ?
- The chemial name of Uria is
- Which of the following characters is not shown by hydrogen
- Which of the following elements is obtained from sea weeds ?
- According to Daltons atomic theory the smallest particle which can exist independently is
- The speed of light with the rise in the temperature of the medium
- Brass gets discoloured in air due to the presence of which gas in air
- Water has maximum density at
- The solar eclipse occurs when
- Permanent hardness of water can be removed by adding
- The property of a substance to absorb moisture from the air on exposure is called
- Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
- When a gas is turned into a liquid, the process is called
- Quartz crystals normally used in quartz clocks etc. is chemically