The type of glass used in making prisms and lenses is
Pyrex glass
Soft glass
Flint glass
Jena glass
- The major ingredient of leather is
- Apparatus invented by Archimedes is :
- The oxide of Nitrogen used in medicine as anaesthetic is
- Polythene is industrially prepared by the polymerisation of
- The element present in the largest amount in rocks and minerals is
- Water has maximum density at
- Which of the following is in liquid form at room temperature ?
- Rust is
- The metal used in storage batteries
- Liquefied Petroleum gas (LPG) consists of mainly
- The formula of Plaster of Paris is
- The chemial name of Uria is
- What is the unit for measuring the pitch or frequency of sound ?
- Quartz crystals normally used in quartz clocks etc. is chemically
- The hardest substance available on earth is
- The solar eclipse occurs when
- The metallic constituents of hard water are
- Which of the following elements is a metal
- Which of the following elements is obtained from sea weeds ?
- The intencity of Earthquakes is measured on
- Which of the following characters is not shown by hydrogen
- The property of a substance to absorb moisture from the air on exposure is called
- The metal that is present in Photo Films is
- The removal of top soil by water or wind is called
- Brass gets discoloured in air due to the presence of which gas in air
- The recent atomic weight scale is based on
- Earth's seasons are caused by which of the following?
- The smallest functional and structural unit of kidney is called as
- The location and energy of an electron in an atom can be specified by
- Nitrification means