The conversion of gas to liquid is known as:

• A. Condensation
• B. Sublimation
• C. Evaporation
• A) Condensation

Which one of the following disease is genetically linked?

• A. Mumps
• B. Aids
• C. Color blindness
• C) Color blindness

The cheapest source of electricity is:

• A. Hydel
• B. Nuclear
• C. Solar
• A) Hydel

By which plants produce sugar and starch by means of sun light which from:

• A. Fertilization
• B. Photosynthesis
• C. Pasteurization
• B) Photosynthesis

The following is not a radioactive element:

• A. Uranium
• B. Thorium
• C. Plutonium
• D. Cadmium

The planet with the shortest rotation time around its axis is

• A. Mars
• B. Jupiter
• C. Earth
• B) Jupiter

The element required for solar energy conversion is

• A. Silicon
• B. Germanium
• C. Uranium
• A) Silicon

Elements are grouped together according to their atomic number in a table, what is this table called?

• A. Periodic table
• B. Atomic table
• C. Table of elements
• A) Periodic table

The main constituent of Biogas is:

• A. Methane
• B. Hydrogen
• C. Oxygen
• A) Methane

Deficiency of Iodine causes which of the following diseases?

• A. Dental cavities
• B. Scurvy
• C. Hepatitis c
• D. Goitre