The recent atomic weight scale is based on
1H1
1H2
6C12
8O16
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- Which of the following elements is a metal
- Nitrification means
- Which of the following is in liquid form at room temperature ?
- The removal of top soil by water or wind is called
- The intencity of Earthquakes is measured on
- What is the unit for measuring the pitch or frequency of sound ?
- Polythene is industrially prepared by the polymerisation of
- Rust is
- Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
- The colour of Emerald is
- Which of the following elements is non-radioactive?
- Bromine is
- Cell membrane is
- The most important ore of Aluminium is
- The metal that is present in Photo Films is
- Brass gets discoloured in air due to the presence of which gas in air
- In an atomic nucleus, neutrons and protons are held together by
- The smallest functional and structural unit of kidney is called as
- Quartz crystals normally used in quartz clocks etc. is chemically
- According to Daltons atomic theory the smallest particle which can exist independently is
- Lightening cause rainfall because
- The property of a substance to absorb moisture from the air on exposure is called
- The type of glass used in making prisms and lenses is
- The major ingredient of leather is
- Which of the following characters is not shown by hydrogen
- The solar eclipse occurs when
- Which of the following is the lightest metal ?
- The metallic constituents of hard water are
- The speed of light with the rise in the temperature of the medium
- Pollination by birds is called