The metallic constituents of hard water are
Calcium, magnesium and iron
Magnesium, Calcium and tin
Magnesium, tin and iron
Iron, tin and calcium
- The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
- What is the unit for measuring the pitch or frequency of sound ?
- Nitrification means
- Water has maximum density at
- The type of glass used in making prisms and lenses is
- The recent atomic weight scale is based on
- The element present in the largest amount in rocks and minerals is
- The removal of top soil by water or wind is called
- Lightening cause rainfall because
- Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere…
- Quartz crystals normally used in quartz clocks etc. is chemically
- The fastest-running terrestrial animal is
- Which of the following is the lightest metal ?
- Apparatus invented by Archimedes is :
- The smallest functional and structural unit of kidney is called as
- Pollination by birds is called
- When a gas is turned into a liquid, the process is called
- Which of the following characters is not shown by hydrogen
- One fathom is equal to
- The formula of Plaster of Paris is
- Epoxy resins is used as
- The major ingredient of leather is
- According to Daltons atomic theory the smallest particle which can exist independently is
- The marine animal called dugong which is vulnerable to extinction is a/an
- The metallic constituents of hard water are
- The metal that is present in Photo Films is
- Earth's seasons are caused by which of the following?
- In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If…
- Which of the following elements is obtained from sea weeds ?
- The most important ore of Aluminium is