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प्रश्न
State the most reactive and the least reactive metal from the following – Zn, Ag, Na, Fe, Cu, Pb.
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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
Match the formulas of the following gases with their correct names :
Gases - (a) H2 (b) N2 (c) O2 (d) Cl2 (e) HCI (f) NH3 (g) CO (h) CO2 (i) SO2 (j) NO (k) NO2.
Names:
(1) Ammonia (2) Nitrogen Dioxide (3) Oxygen (4) Hydrogen (5) Nitrogen (6) Chlorine (7) Carbon Monoxide (8) Sulphur Dioxide (9) Nitrogen Monoxide (10) Carbon Dioxide (11) Hydrogen Chloride
Give the symbol of the following element:
Oxygen
Give the symbol of the following element:
Xenon
Give the symbol of the following element:
Radon
State the type of element for the following:
Lead
State the type of element for the following:
Platinum
State the type of element for the following:
Radon
State the type of element for the following:
Aluminium
Write the radical of the following valency:
Sulphite
The pictorial symbol for water given by the alchemists was
