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प्रश्न
An element has 2 electrons in its 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 a balanced chemical reaction.
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उत्तर
An element that has 2 electrons in its N shell is Magnesium. The atomic number of magnesium is 12, and its electronic configuration is (2, 8, 2). A non-metal having atomic number 7 is Nitrogen. The compound formed with Magnesium and Nitrogen is Magnesium Nitride (Mg3N2).
\[\ce{3Mg + N2 ->[800^\circ C] Mg3N2}\]
When Magnesium Nitride reacts with warm water, it produces ammonia gas.
The balance equation is as follows:
\[\ce{Mg3N2 + \underset{(warm water)}{6H2O} -> 3Mg(OH)2 + 2NH3 \uparrow}\]
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संबंधित प्रश्न
A gas ‘P’ gives dense white fumes with chlorine. Its aqueous solution gives a blue colour with copper (II) hydroxide.
- Name the gas P.
- Give its formula.
- Give three uses of P.
Name the following
Products obtained by burning ammonia in oxygen.
Why is ammonium hydroxide used in qualitative analysis? Give two equations to justify your answer.
Write an equation for the reaction to prepare one fertilizer from ammonia.
Certain blank spaces are left in the following table and these are labelled as A,B,C,Da and E. Identify each of then
|
1 |
HCl gas |
NaCl + H2SO4 |
A = ________ |
Conc.H2SO4 |
B = ___ |
|
2 |
NH3 gas |
C = ____ |
Mg(OH)2NH3 |
D = ______ |
E = ___ |
Give balanced chemical equations for of the following :
Reaction of ammonia with excess chlorine.
Complete and balance the equation: CuO(heated) + NH3 →
Copy and complete the following equation:
\[\ce{Mg3N2 + 6H2O ->}\]
State one relevant observation for the following:
Burning of ammonia in excess of oxygen.
A compound which undergoes thermal dissociation.
