What volume of (dm\(^3\)) of water will be added to 10dm\(^3\) of 2.0 mol/dm\(^3\) HCL acid solution to give a final solution of 0.5 mol/dm\(^3\)?

The above table shows the compositions of the atmosphere of planet X. Which of these gases are present in higher percentages on earth?

(a)i.  Define an acid according to the Lewis concept

ii. Give one example of a Lewis acid

(b) Explain salting out in soap preparation

(c) State the reagent and condition necessary for the following conversion
H−C≡C−H→Ag−C≡C−Ag

(d) What is the percentage abundance of an isotope?

(e)i. Why does the element with atomic number 18 not have an oxide?

ii. Explain why chlorine(I) oxide has a low melting point

(f). Describe a test to distinguish between concentrated HNO3 and concentrated H2SO4

(g) State two differences between an electrochemical cell and an electrolytic cell

(h) How does the trend in ionization energy affect the reactivity of group 1 elements?

(i).Define the term molecular formula

(j) State which of the gases H2 and NH3 would deviate more from ideal behaviour. Give reasons for the answer stated above

(a)i. State two conditions used in the Haber process

ii. Explain briefly the effect of increasing the pressure on the rate of reaction in the Haber process.

(b)i. A mixture of nitrogen(IV) oxide and oxygen is bubbled into warm water to produce
trioxonitrate(V) oxide, write a balanced chemical equation for the reaction.

ii. Using a balanced chemical equation only, explain what would happen if nitrogen(IV) oxide is bubbled into warm water.

iii. 

Compare the gases evolved when trioxonitrate(V) acid decomposes under each of the following properties:

i. pH
ii. Solubility in water

iii. Reaction with carbon(II) oxide

(c)i. Name two oxides of sulphur

ii. Write a balanced equation for the reaction between each of the named oxides(Sulphur(IV) oxide, Sulphur (VI) oxide) and water

(d)i. Name one calcium compound

a, Used to dry ammonia gas
b. Used in the manufacture of cement
c. That causes hardness in water
d. Name one calcium compound

(a) Describe the observation that would be made when-----

i. Sulphur is heated from room temperature till 1190C
ii. 50% trioxonitrate(V) acid acts on copper tunings

(b)i. State two gaseous pollutants that can be generated by burning coal.

ii. What gas is responsible for most of the explosions in coal mines?

iii. The mining of coal leads to environmental pollution. State two environmental effects of the mining activity.

iv. Explain briefly why coal burns more easily when it is in pieces than in lump form

v. Name the non-volitile residue after the destructive distillation of coal

(c)i. Describe a chemical test for water

ii.a. State the effect of boiling a temporary hard water
b. State the effect of adding sodium trioxocarbonate(IV) crystals to permanent hard water

iii. Write an equation for the process of boiling a temporary hard water