The confirmatory test for alkanoic acids in organic qualitative analysis is the?

• A. turning of wet blue litmus paper red
• B. reaction with alkanols to form esters
• C. reaction with sodium hydroxide to form salt and water
• D. reaction with aqueous Na2COsp3 to liberate a gas which turns lime water milky

(a) The elements listed below to the same group in the Periodic Table \(_9F\) \(_{17}CI\) \(_{35}Br\) \(_{53}I\).

(i) Write the electronic structure of the first member

(ii) What is the family name of the elements.

(iii) Which of the elements has the strongest oxidizing ability?

(b) Use the information provided in the following table to answer Questions (i) to (ii) below

(b)(i) Which of the chlorides would exist as discrete molecules?

(ii) What type of bonding holds atoms of A and chlorine together in ACI?

(iii) Which of the chlorides would be a good conductor of electricity?

Chlorine water is used as a bleaching agent because it is

• A. An acidic solution
• B. An alkaline solution
• C. An oxidizing agent
• D. A reducing agent

What is the process associated with conversion of vegetable oil to soap?

• A) Esterification
• B) Saponification
• C) Hydrolysis
• D) Acidification

Which of the following substances is an example of a fine chemical?

• A. Sodium hydroxide
• B. Hydrochloric acid
• C. Ethylene
• D. Ammonia

0.499g of CuSO XH₂0 when heated to constant weight gave a residue of 0.346g. What is the value of X?

• A) 2.0
• B) 3.0
• C) 5.0
• D) 4.0

Which or the following products could be formed during incomplete combustion of a hydrocarbon. i.Carbon ii. Hydrogen III. Carbon (Il) oxide

• A. I only
• B. I and II only
• C. I and III only
• D. II and III only

An organic compound that does not undergo a reaction with both hydrogen cyanide and hydroxylamine can be?

• A. Alkene
• B. Alkanal
• C. Alkanone
• D. Alkanoic Acid

(a)(i) Draw the energy profile diagram for the reaction

H\(_{2(g)}\) + I\(_{2(g)}\) ---> 2HI\(_{(g)}\) \(\Delta\) = —13 kJmol\(^3\)

(ii) If the concentration of HI increases from 0 to 0.001 mol dm\(^3\) in 50 seconds, what is the rate of the reaction?

(b) State the type of salt represented by each of the following compounds:

(i) K\(_4\)Fe(CN)\(_6\) (ii) (NH\(_4\))\(_2\)Fe(SO\(_4\))\(_2\)6H\(_2\)O (iii) Mg(OH)NO\(_3\) (iv) NaH\(_2\)PO\(_4\).

(c) Explain, giving equations, the following observation: When carbon (IV) oxide is passed into lime water, it turns milky initially but turns clear with excess carbon (IV) oxide.

(d)(i) Give one use for each of the following compounds: CaCO\(_3\), CaSO\(_4\), NaHCO\(_3\).

(ii) State a drying agent for each of the following gases: i. NH\(_3\), II. HCI Ill. SO\(_4\).

(iii) Write an equation to illustrate the reaction of ammonia as a reducing agent.

(e) An industrial raw material has the following composition by mass:

Iron = 28.1%

Chlorine = 35.7%

Water of crystallization = 36.2%

Calculate the formula for the material. [ H = 1, 0 = 16, Cl = 35.5, Fe = 56 ].

The type of bonds in ammonium chloride are

• A) Covalent and electrovalent
• B) dative and covalent
• C) dative and electrovalent
• D) covalent, dative and electrovalent