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Byju's Answer
Standard IX
Chemistry
Layout of Modern Periodic Table
Which among t...
Question
Which among the following pairs of elements has its valency as 2?
A
Aluminium ; oxygen
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B
Sodium ; hydrogen
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C
Chlorine ; magnesium
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D
Magnesium ; oxygen
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Solution
The correct option is
D
Magnesium ; oxygen
.
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Q.
Deduce the molecular formulae of the compound obtained from the following pairs of elements by the cross multiplication method.
A. C (Valency 4) & Cl (Valency 1)
B. N (Valency 3) & H (Valency 1)
C. C (Valency 4) & O (Valency 2)
D. Ca (Valency 2) & O (Valency 2)