Which of the following statement is incorrect?
i) All isotopes of same elements have different valency
ii) Position of hydrogen in modern periodic table is a demerit.
iii) Lead nitrate solution removes hydrogen sulphide in purification of hydrogen gas.
iv) Hydrogen is entrapped in rocks in free state.
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Answer:
C is the correct answer
Explanation:
and I wish that it will help you very much
hirangipatel2012:
which one is incorrect?
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