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  • Question
  • What do you call elements with Atomic Number between 57 and 71?


  • Correct Answer
  • 'Rare earth'(They are all metals) 


  • General Science problems


    Search Results


    • 1. The primary colors are-

    • Options
    • A. Yellow, red, blue
    • B. Green, white, black
    • C. Blue, green, yellow
    • D. Red, blue, green
    • Discuss
    • 2. DNA fingerprinting is used to identify the

    • Options
    • A. Rapist
    • B. Parents
    • C. Thieves
    • D. All of the above
    • Discuss
    • 3. Radio Carbon Dating is use to estimate the age of _____ ?

    • Options
    • A. Monuments
    • B. Rocks
    • C. Soil
    • D. Fossils
    • Discuss
    • 4. Where does the chemical reactions called Mellaird reaction takes place?
    • Discuss
    • 5. What is a 'Cosmic year'?
    • Discuss
    • 6. Which layer of the atmosphere contains the ozone layer?

    • Options
    • A. Troposphere
    • B. Stratosphere
    • C. Thermosphere
    • D. Mesosphere
    • Discuss
    • 7. Most Explosive Type of Volcano is

    • Options
    • A. The Cinder Cone
    • B. Rhyolite caldera complexes
    • C. Shield Volcanoes
    • D. The Basault Volcanoes
    • Discuss
    • 8. Which one among the following stars is nearest to the earth?

    • Options
    • A. Proxima Centauri
    • B. Sirius
    • C. Arcturus
    • D. Spica
    • Discuss
    • 9. What is the value of the Least Distance of Distinct vision (in cm) for a normal human being?

    • Options
    • A. 2.5
    • B. 25
    • C. 58
    • D. 60
    • Discuss
    • 10. Special 3-D photographs which have been taken with laser beams (and which make the objects look real) are called what?

    • Options
    • A. Holograms
    • B. 3D special effects
    • C. Portraits
    • D. DVD
    • Discuss


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