Consider the reaction below: Vegetable oil (frac{H2;NI catalyst}{High temperature}) product. The reaction is applied in the manufacture of

• A. drugs
• B. margarine
• C. paraffin wax
• D. soapy detergents

When chlorine is passed through a sample of water, the pH of the water sample would be

• A.< 7
• B. > 7
• C. = 7
• D. 0

When calcium oxide is heated with carbon, the oxide will

• A. be converted to carbide
• B. be converted to the trioxocarbonate (IV) salt
• C. decompose to the metal
• D. melt,producingg carbon (IV) oxide

What volume of oxygen will be left unreached when a mixture of 100cm³ of hydrogen and 200cm³ of oxygen are exploded in a eudiometer?

• A. 300cm³
• B. 200cm³
• C. 150cm³
• D. 50cm³

Which of the following is a physical change?

• A. The bubbling of chlorine into water
• B. The bubbling of chlorine into a jar contanining hydrogen
• C. The dissolution of sodium chloride in water
• D. The passing of steam over heated iron

What is the change in oxidation number of manganes in the reaction represented by the following equation? MnO-4(aq) + 8H+(aq) + 5e- → Mn2+(aq) + 4H2O(l)

• A. +3 to + 2
• B. + 4 to + 2
• C. + 5 to + 2
• D. + 7 to 2

Which of the following is used to hasten the ripening of fruit?

• A) Ethene
• B) Ethanol
• C) Ethyne
• D) Ethane

Lead and tin are the components of

• A. steel
• B. bronze
• C. brass
• D. soft solder

Which of the following methods can be used to seperate blood cells from plasma?

• A. Centrifugation
• B. Filtration
• C. Chromatography
• D. Distillation

A metallic oxide which reacts with both HCl and NaOH to give salt and water only can be classified as?

• A. an acidic oxide
• B. a basic oxide
• C. a neutral oxide
• D. an amphoteric oxide