The type of glass used in making prisms and lenses is
Pyrex glass
Soft glass
Flint glass
Jena glass
- Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous…
- The property of a substance to absorb moisture from the air on exposure is called
- Nitrification means
- Water has maximum density at
- Which of the following elements is obtained from sea weeds ?
- The fastest-running terrestrial animal is
- Cell membrane is
- Apparatus invented by Archimedes is :
- Pollination by birds is called
- Which of the following is in liquid form at room temperature ?
- The recent atomic weight scale is based on
- The solar eclipse occurs when
- When a gas is turned into a liquid, the process is called
- Polythene is industrially prepared by the polymerisation of
- The hardest substance available on earth is
- Brass gets discoloured in air due to the presence of which gas in air
- Epoxy resins is used as
- Which of the following is commonly called a polyamide ?
- The marine animal called dugong which is vulnerable to extinction is a/an
- The type of glass used in making prisms and lenses is
- Rust is
- In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
- The major ingredient of leather is
- The metal used in storage batteries
- Which of the following parts of the sun is easily visible only during a total solar eclipse?
- The metal that is present in Photo Films is
- Which of the following is the lightest metal ?
- Earth's seasons are caused by which of the following?
- The element present in the largest amount in rocks and minerals is
- Old-written material, which cannot be read easily can be read by