The major ingredient of leather is
Nucleic acid
Carbohydrate
Collagen
Polymer
- Which of the following parts of the sun is easily visible only during a total solar eclipse?
- The fastest-running terrestrial animal is
- The intencity of Earthquakes is measured on
- The solar eclipse occurs when
- According to Daltons atomic theory the smallest particle which can exist independently is
- Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
- The metallic constituents of hard water are
- Brass gets discoloured in air due to the presence of which gas in air
- The oxide of Nitrogen used in medicine as anaesthetic is
- Liquefied Petroleum gas (LPG) consists of mainly
- Polythene is industrially prepared by the polymerisation of
- Which of the following elements is non-radioactive?
- The formula of Plaster of Paris is
- The speed of light with the rise in the temperature of the medium
- Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
- Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
- One fathom is equal to
- The major ingredient of leather is
- Permanent hardness of water can be removed by adding
- The most important ore of Aluminium is
- Nitrification means
- The element present in the largest amount in rocks and minerals is
- Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
- Quartz crystals normally used in quartz clocks etc. is chemically
- Rust is
- Apparatus invented by Archimedes is :
- The type of glass used in making prisms and lenses is
- The fastest acting enzyme in the biological kingdom is
- In an atomic nucleus, neutrons and protons are held together by
- Earth's seasons are caused by which of the following?