Advertisements
Advertisements
प्रश्न
Give a reason why metals are arranged in a series called – ‘activity series of metals’. Name a metal which reacts with
(a) Cold water
(b) Boiling water
(c) Steam to liberate hydrogen in each case.
Advertisements
उत्तर
Metals arranged in series are called ‘activity series of metals’ because metals differ in tendency to lose valence electrons and can be arranged in a series, i.e. metals are arranged in decreasing order of their reactivity. The most reactive metal at top of the series and then with decreasing reactivity.
Metal that reacts with
(a) Cold water – Sodium
2Na + 2H2O → 2NaOH + H2
(b) Boiling water – Magnesium [Mg]
(c) Steam – Iron [Fe]
APPEARS IN
संबंधित प्रश्न
Complete the following chemical reaction.
\[\ce{PbS_{(s)} + H_2O_{2(aq)} ->}\] ______
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
Complete the following chemical reaction.
\[\ce{MnO^-_{4(aq)} + H_2O_{(g)} ->}\]
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
Complete the following chemical reaction.
\[\ce{CaO_{(s)} + H_2O_{(g)} ->}\]?
Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.
What is the difference between the terms ‘hydrolysis’ and ‘hydration’?
How the temporary and permanent hardness is removed?
Give a balanced equation for the following conversion:
Iron to triiron tetroxide using steam.
State a reason to prove that water is a compound and not a element.
Write a short note on the catalytic nature of water.
Write the chemical equation for the production of water when zinc reacts with sulphuric acid.
The metal that gives hydrogen gas upon treatment with both acid as well as base is ______.
