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प्रश्न
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
उत्तर
It is a series of metals arranged according to their reactivity in which the most reactive metal i.e. potassium is at the top of the series and the least reactive metal i.e. gold is at the bottom.
The most reactive metal is Na.
The less reactive metals are Zn, Fe, Pb.
The least reactive metals are Ag, Cu.
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
The Latin language name of an element is natrium. The English name of this element is :
The anion of an element has :
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Phosphate
Fill in the blank:
Symbol represents _____ atom(s) of an element.
Explain the terms ‘chemical formula’.
Give the symbol of the following element:
Potassium
Give the symbol of the following element:
Chlorine [chloride]
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bromide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Bicarbonate
