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Quiz
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others
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12th Grade
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Practice Problem
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Hard
Abdissa Gebisa
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18 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
What are the characteristic properties of s-block elements?
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Answer explanation
Characteristic properties of s-block elements include having one or two valence electrons, being highly reactive, and forming alkaline solutions when combined with water.
2.
OPEN ENDED QUESTION
3 mins • 1 pt
What is the trend in metallic character down the s-block elements?
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Answer explanation
The trend in metallic character down the s-block elements increases. As you move down the group, the atomic size increases, leading to easier loss of electrons and higher metallic character.
3.
OPEN ENDED QUESTION
3 mins • 1 pt
Explain the variation in electronegativity across Group I and Group II s-block elements.
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Answer explanation
Electronegativity decreases down Group I and Group II due to increasing atomic size and shielding effect, reducing the attraction for electrons.
4.
OPEN ENDED QUESTION
3 mins • 1 pt
Describe the formation of basic oxides and hydroxides by s-block elements.
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Answer explanation
S-block elements form basic oxides and hydroxides by donating electrons to oxygen or hydroxide ions, resulting in the formation of ionic compounds with a basic pH.
5.
OPEN ENDED QUESTION
3 mins • 1 pt
What are the fixed oxidation states of Group I and Group II s-block elements?
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
Explain the characteristic flame colors produced by s-block elements.
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Answer explanation
S-block elements produce characteristic flame colors due to the excitation of electrons to higher energy levels and subsequent emission of light when returning to ground state.
7.
OPEN ENDED QUESTION
3 mins • 1 pt
Why do s-block metal ions have a weak tendency to form complexes?
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