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Byju's Answer
Standard XII
Chemistry
Introduction
Chalcogens is...
Question
Chalcogens is the common name for some elements present in:
A
IV A group
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B
V A group
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C
VI A group
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D
VI group
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Solution
The correct option is
C
VI A group
Chalcogen is commonly known as name for VI group(Oxygen family)
They are called chalcogens because they form a wide variety of metal areas.
So, the correct option is
C
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Q.
True or False
VI A group elements are known as chalcogens.
Q.
_______ group elements are known as chalcogens.
Q.
Chalcogen group elements are :
Q.
(a) What is meant by a functional group? Explain with an example.
(b) Write three common functional groups present in organic compounds. Giver their symbols/formulae.
(c) Name the functional groups present in the following compounds:
(i) CH
3
COOH
(ii) CH
3
CH
2
CHO
(iii) C
2
H
5
OH
(iv) CH
3
COCH
2
CH
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(d) Name the functional group which always occurs in the middle of a carbon chain.
(e) Draw the structures for the following compounds:
(i) Ethanal
(ii) Propanal
(iii) Butanal
(iv) Pentanal