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What are chalcogens ? Why are group 16 e...

What are chalcogens ? Why are group 16 elements called chalcogens ?

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### Step-by-Step Solution: 1. **Definition of Chalcogens**: - Chalcogens are the elements found in Group 16 of the periodic table. The term "chalcogen" comes from the Greek words "chalcos," meaning "ore," and "genes," meaning "to produce" or "to form." Therefore, chalcogens can be interpreted as "ore-forming" elements. 2. **Characteristics of Chalcogens**: - The chalcogens include the elements oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po). These elements are known for their ability to form compounds with metals and non-metals, particularly oxides and sulfides. ...
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ICSE-P-BLOCK ELEMENTS-EXERCISE (PART-II)(DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Mention one use of hydrazine.

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  2. Basicity of H3PO2, H3PO3 and H3PO4 is not the same. Explain

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  3. What are chalcogens ? Why are group 16 elements called chalcogens ?

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  4. What is the outer shell electronic configuration of chalcogens?

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  5. Name the allotropes of oxygen.

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  6. Which element of group 16 has maximum tendency for catenation ?

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  7. Ionisation enthalpy of nitrogen is more than oxygen because of

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  8. What is hypo?

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  9. Sodium thiosulfate is a salt of which acid ?

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  10. Give one method of preparation of sodium thiosulfate.

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  11. Which form of sulphur shows paramagnetic behaviour ?

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  12. What are allotropes of sulfur?

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  13. What do you understand by (a) inert pair effect (b) allotropy and (c...

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  14. What is oleum ? What is the oxidation state of sulfur in it?

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  15. What property of conc. H2SO4 is made use of in each of the following c...

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  16. Give reason why? Conc. H(2)SO(4) is not a drying agent for H(2)S?

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  17. What happens when ozone reacts with KI solution?

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  18. Why a black suspension of lead (II) sulfide in water turns white when ...

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  19. What happens when ozone and hydrogen peroxide are allowed to react wit...

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  20. What is tailing of mercury ?

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