1) NAME THE FOLLOWING:
a) products obtained by burning Ammonia in Oxygen.
b) Gas obtained by treating chlorine in excess with ammonia.
c) solid obtained by passing Ammonia over heated copper oxide .
d) products obtained when a mixture of ammonia and oxygen is passed over heated Platinum.
e) Gas obtained by treating metallic nitrides with hot water.
f) substance used to dry Ammonia .
g) raw materials used in the laboratory preparation of ammonia.
h) product obtained by treating chlorine in excess of ammonia.
i) basic gas that is used as a refrigerant.
j) salt known as salt ammonia.
k) salt used to clean metal surfaces before soldering tinning, etc.
l) Salt used in dry cells.
m) ammonium salt used in the preparation of alume.
n) ammonium salt used in explosives.
o) products obtained by the catalytic oxidation of ammonia.
p) A gas which turns moist red litmus blue and reduces copper oxide to copper.
q) the gas evolved when calcium hydroxide and Ammonium chloride are heated.
r) A gas whose solution in water is alkaline.
s) a compound which on heating with Sodium Hydroxide produces a gas which forms dense white fumes with hydrogen chloride.
B) STATE WHETHER TRUE OR FALSE. ALSO CORRECT THE INCORRECT STATEMENTS:
a) Platinum is used as a catalyst in the manufacture of ammonia by Haber's process.
b) A solution of ammonia dissolve in water is called liquid ammonia.
c) In the laboratory preparation of ammonia, ammonia is collected by upward displacement of air.
d) In the manufacture of ammonia by Haber's process. the reactants nitrogen and hydrogen are taken in the ratio of 3:1 by volume.
e) concentrated sulphuric acid can be used as a drying agent for Ammonia gas.
f) ammonium Hydroxide reacts with iron sulphate to form reddish brown precipitate of iron Hydroxide.
g) Ammonia gas can be identified with its strong rotten eggs smell.
h) a mixture of Ammonium Nitrate and slaked lime is used in the laboratory preparation of ammonia.
i) all ammonium salts on heating decomposes to liberate ammonia gas.
C) GIVE REASONS:
a) ammonia is to present in sewage water.
b) Ammonia cannot be collected over Water.
c) aqueous solution of ammonia gives a pungent smell.
d) Ammonia solution is used as a laboratory reagent to identify metal ions.
e) Ammonia solution is used to remove oil and grease.
f) liquid ammonia used as refrigerant.
D) ANSWER THE FOLLOWINGS:
1) Ammonia gives dense white fumes with hydrogen chloride gas. Name another gas which also gives white fumes.
2) During laboratory preparation, how is ammonia dried and collected ?
3) How would you distinguish between Zn² and Pb² using ammonium Hydroxide solution?
4) How are the following conversations brought about ? Give equations?
a) Ammonium chloride to ammonia
b) Sodium hydroxide to ammonia.
5) How is liquor ammonia different from liquid ammonia?
6) The following reactions are carried out:
A: nitrogen+ metal-->compound X
B: X+ water--> ammonia+ another compound
C: ammonia+ metal oxide--> metal+ water+ nitrogen.
One metal that can be used for reaction A is magnesium.
a) Write the formula of the compound X formed when nitrogen and magnesium react together.
b) Write the correctly balanced equation for reaction B where X is the compound formed between nitrogen and magnesium.
c) What property of ammonia is demonstrated by reaction C?
7) Industrially ammonia is obtained by direct combination between nitrogen and hydrogen.
a) write the correctly balanced equation for the direct combination of Nitrogen with hydrogen.
b) which of the metal, Iron, Platinum or copper catalyze this direct combination?
c) is the formation of ammonia promoted by the use of high pressure or low pressure ?
8)a) is ammonia more than dense or less dense than air?
b) what property ammonia is demonstrated by the fountain experiment ?
c) write the correctly balanced equation for the reaction between Ammonia and sulphuric acid.
9)a) which feature of ammonia molecule leads to the formation of the ammonia dissolves in water?
b) name the other Ion formed when Ammonia dissolve in water.
c) Give one test that can be used to detect the presence of the ion produced in (b).
10)a) Of two gases, Ammonia and hydrogen chloride, which is more dense ? Name the method of collection of the gas ?
b) give one example of a reaction between the above two gases which produces a solid compound.
11)a) what is the purpose of the Haber's process ?
b) name the gaseous inputs of the Haber's process and state the ratio by volume in which the gases are mixed.
c) what is done to increase the rate of a reaction in Haber's process ?
d) give two different ways by which the product can be separated from the reactants.
12)a) how soluble is ammonia in water ?
b) give two reasons to show that the solution of ammonia in water contains contains hydroxide ions.
c) Name a simple method you would employ to prepare ammonium salts in your laboratory.
E) OBSERVATION QUESTIONS:
1) when water is poured over aluminium nitride (AIN)?
2) when ammonia is bubbled through red litmus solution?
3) when a piece of moist red litmus paper is placed in a glass jar of ammonia.
F) BALANCE THE FOLLOWING:
1) 2NH₄Cl + Ca(OH) ₂ --> CaCl₂ + 2H₂O + 2NH₃ .
2) ammonium chloride and sodium hydroxide are heated.
3) chlorine with excess of ammonia
4) Ammonia sulphate from ammonia and dilute sulphuric acid.
5) NH₃+ Cl₂--> ____+ ______
6) 2NH₄OH(aq) + H₂SO₄ --> ___+ ___
7) 8NH₃+ 3Cl₂--> ____+____
8) CuO + NH₃-->___+___+____
9) 4NH₃+ 5H₂O --> ___+_____
G) Select from the list given below (A to F). The one substance which matches the given description.
A. Ammonia
B. Copper oxide
C. Copper sulphate
D. Hydrogen chloride
E. Hydrogen sulphide
F. Lead bromide
Although this compound is not a metal hydroxide, its aqueous solution is alkaline in nature.
H) FILL IN THE BLANKS:
1) Ammonia chloride is a soluble salt prepared by ______ (precipitation/neutralization)
2) When Ammonium chloride is heated, it undergoes thermal____. (Decomposition/dissociation)
3) Heating Ammonium chloride with sodium hydroxide produces ___.(ammonia/nitrogen).
