Chemistry
An element has 2 electrons in it's N shell. It reacts with a non-metal of atomic number 7. The compound formed reacts with warm water and produces a basic gas. Identify the elements and write the balanced chemical reactions.
Ammonia
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Answer
An element has 2 electrons in it's N shell, hence, it has
- 2 (electrons in K shell) +
- 8 (electrons in L shell) +
- 8 (electrons in M shell) +
- 2 (electrons in N shell) = 20 electrons total i.e. Calcium
Non metal (atomic number 7) is Nitrogen
Calcium and Nitrogen react to form calcium nitride.
3Ca + N2 ⟶ Ca3N2
Ca3N2 reacts with water to give calcium hydroxide and ammonia.
Ca3N2 + 6H2O ⟶ 3Ca(OH)2 + 2NH3 [g]
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Related Questions
State the following conditions required in the Haber's process-
(a) Temperature
(b) Pressure
(c) Catalyst
Choose the correct word or phrase from the brackets to complete the following sentences and write balanced equations for the same.
(a) Ammonium chloride is a soluble salt prepared by …………… [precipitation, neutralization].
(b) When ammonium chloride is heated, it undergoes …………… [thermal decomposition/dissociation].
(c) Heating ammonium chloride with sodium hydroxide produces …………… [ammonia, nitrogen].
The following reactions are carried out
A: Nitrogen + metal ⟶ compound X.
B: X + water ⟶ ammonia + another compound.
C: Ammonia + metal oxide ⟶ metal + water + N2
One metal that can be used for reaction A is magnesium.
(a) Write the formula of the compound X formed
(b) Write the correctly balanced equation for reaction B where X is the compound formed.
(c) What property of ammonia is demonstrated by reaction C ?
Correct the following:
(a) A reddish-brown precipitate is obtained when ammonium hydroxide is added to ferrous sulphate.
(b) Liquid ammonia is a solution of NH3.
(c) Finely divided platinum is used in Haber's Process.
(d) Conc. H2SO4 is a drying agent for NH3.
(e) Ammonium salts, on heating, decompose to give ammonia.