Introduction to Ammonia
Trending Questions
Give reason:-
Aqueous solution of ammonia gives a pungent smell.
- None of these
What will you observe when -
(i) red litmus paper is introduced into a solution of sodium sulfate?
(a) What are fertilizers.
(b) Give equations for the preparation of two different nitrogenous fertilizers.
Ammonia can be obtained by adding water to:
ammonium chloride
ammonium nitrite
magnesium nitride
magnesium nitrate
A+B→C+D
is in chemical equilibrium when the rate of forward reaction becomes :
- Equal to the backward reaction
- More than backward reaction
- Less than backward reaction
- may be more or less than backward reaction
Growing up of a child is a ___________(slow/ fast) change.
3. Write the changes which cannot be reversed.
Give chemical equation(s) to prove that NH3 contains nitrogen and hydrogen ?
- Colourless
- Pungent odour
- Bitter taste
- Lighter than air
- Soluble in water
- Acidic in nature
- Odourless
- Red in colour
(b) Under what conditions do the reactants combine to form ammonia? Give a balanced equation for the reaction.
(c) In what ratio by volume, are the above reactants used.
(d) State one possible source of each reactant used in the process.
(e) What is the function of:
(i) finely divided iron,
(ii) molybdenum in the above process.
(f) Mention two possible ways by which ammonia produced is removed from unchanged gases.
Give scientific reasons for the burning of cooking gas is a fast change.
Ammonia was initially called
- Rate of forward reaction is equal to the rate of backward reaction at equilibrium
- Pressure, concentration, density remains constant at equilibrium
- Equilibrium occurs only in open vessels at constant temperatures
- Equilibrium can be obtained by either side of a reaction
Its chemical properties remain the same. Usually increasing the temperature of applying pressure or both brings about a physical change. On reversing the condition, i.e., reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible. A chemical change is a change that involves a change in the chemical composition of matter. A new substance is formed. In a chemical change, the chemical and physical properties of the substance is formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance. When zinc carbonate is heated and cooled, the change(s) that are observed are :
- Physical
- Nuclear changes
- First chemical and then physical
- First physical and then chemical
- 1:3
- 3:1
- 1:4
Urea is an important
Fuel
preservative
fertilisers
food item
Ammonia occurs in ___.
None of these
Combined state only
Both in free and combined state
Free state only
3. Differentiate between fast and slow change.
Ripening of fruits and growing of plants into a tree is an example of:
What do you mean by slow and fast changes?
Which of the following graphs are correct for the given reaction; H2(g)+CO2(g)⇌H2O(g)+CO(g)
Assume initially only H2 and CO2 are present :
Digestion of food is a chemical change
- True
- False
By writing chemical equation,
Give two examples of direct combination when one compound and one element is involved.
On the passage of excess of Ammonia, colourless nesseler's reagent turns to which colour?
Pale Brown
Pale Blue
Pale Yellow
Pale Red
(ii) State the purpose of liquefying ammonia produced in the process.
- True
- False
- 32 J/s
- 30 J/s
- 64 J/s
- 8 J/s
