What is Dry Ice?

• Solid carbon dioxide

• Liquid nitrogen

• Ice cubes and saw dust

• Ice cubes and salt

The gas commonly used in advertisement sign-boards and decorative lights is

• nitrogen

• chlorine

• hydrogen

• neon

Which one of the following is a bad Thermal Conductor?

• Aluminium

• Copper

• Glass

• Silver

What is the minimum distance (in metres) required to hear an echo?

• 10 m

• 13 m

• 17 m

• 21 m

Identify the odd term amongst the following groups.

• Microwaves

• Coaxial cable

• Optical fibre

• Twisted pair wire

Which of the following is not a form of carbon?

• Soot

• Hematite

• Graphite

• Charcoal

Which of the following is not a component of Smog?

• Volatile Organic Compounds

• Nitrogen Oxide

• Sulphur Dioxide

• Chlorine Oxide

Wheat is a................

• Creeper

• Herb

• Shrub

• Tree

Combustion is a

• physical and chemical process

• biological process

• physical process

• chemical process

Pick out the correct match.

• Milk    -    Fibre and minerals

• Egg Yolk    -     Protein and fat

• Fleshy foods   -  Calcium and protein

• Fish    -    Starch and vitamin