Polythene is industrially prepared by the polymerisation of
styrene
methane
ethylene
acetylene
- The solar eclipse occurs when
- The speed of light with the rise in the temperature of the medium
- The marine animal called dugong which is vulnerable to extinction is a/an
- Brass gets discoloured in air due to the presence of which gas in air
- Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
- The oxide of Nitrogen used in medicine as anaesthetic is
- The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
- Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
- Permanent hardness of water can be removed by adding
- The recent atomic weight scale is based on
- The smallest functional and structural unit of kidney is called as
- Which of the following elements is a metal
- The type of glass used in making prisms and lenses is
- The major ingredient of leather is
- Which of the following is commonly called a polyamide ?
- Epoxy resins is used as
- One fathom is equal to
- Old-written material, which cannot be read easily can be read by
- Earth's seasons are caused by which of the following?
- Liquefied Petroleum gas (LPG) consists of mainly
- In an atomic nucleus, neutrons and protons are held together by
- The chemial name of Uria is
- Lightening cause rainfall because
- The property of a substance to absorb moisture from the air on exposure is called
- The fastest-running terrestrial animal is
- Which of the following is the lightest metal ?
- The removal of top soil by water or wind is called
- Which of the following parts of the sun is easily visible only during a total solar eclipse?
- Cell membrane is
- Polythene is industrially prepared by the polymerisation of