The process of converting linear alkanes to branched chain and cyclic hydrocarbons by heating in the presence of a catalyst to improve the quality of petrol is referred to as

• A) refining
• B) craching
• C) reforming
• D) blending

(a) Arrange the first three members of the halogen family in their increasing order of electronegativity. Give the reason for your answer.

(b) State and explain what happens when chlorine reacts with starch iodide paper.

The greenhouse effect is a climatic condition associated with the presence of excess

• A. carbon (IV) oxide
• B. hydrogen sulphide
• C. nitrogen (ll) oxide
• D. ammonia gas

Which of the following statements is true about ionic radius? Ionic radius

• A. increases as nuclear charge increases
• B. decreases as nuclear charge increases
• C. decreases as nuclear charge decreases
• D. remains constant as nuclear charge increases

If a catalyst is added to a system, the temperature and the pressure remain constant, there would be no effect on the?

• A. activation energy of the reaction
• B. rate of the reaction
• C. rate of the reverse reaction
• D. heat of reaction

Which of the following is not a member of the homologous series of the paraffins?

• A)
  C₃H₈
• B)
  C₅H₁₂
• C)
  C₁₅H₃₂
• D)
  C₂₄H₄₈

Which of the following compounds is composed of Al, Si, O and H?

• A. Epsom salt
• B. Limestone
• C. Clay
• D. Urea

What is the atomic number of aluminium?

• A. 13
• B. 26
• C. 14
• D. 12

Which type of chemical combination involves the transfer of electrons from one atom to another, resulting in the formation of oppositely charged ions?

• A. Ionic bonding
• B. Hydrogen bonding
• C. Covalent bonding
• D. Metallic bonding

What is the PH of 0.00 1 moldm^3 solution of the sodium hydroxide

• A) 14
• B) 13
• C) 12
• D) 11