An emulsion is a colloidal solution of

• Liquid in liquid

• Solid in liquid

• Gas in solid

• Gas in solid

Bauxite is used as raw material by which industry?

• Aluminium

• Iron

• Steel

• Steel

When iron rusts, its weight ........

• decreases

• increases

• remains the same

• remains the same

Which one of the following is a water soluble vitamin?

• A

• C

• K

• K

Which of the following pairing is incorrect?

• Hygrometer - Water Vapour content of the atmosphere

• Lactometer - Specific gravity of liquids

• Anemometer  - Speed of the wind

• Anemometer  - Speed of the wind

............ is a byproduct of sewage treatment and can be decomposed to produce bio-gas.

• Sewage

• Sludge

• Sewer

• Sewer

The instrument used for measuring air pressure is called

• Anemometer

• Barometer

• Hygrometer

• Hygrometer

Gustation refers to the sense of which of the following?

• Smell

• Hearing

• Tactile

• Tactile

If a healthy freshwater fish is placed in salt water, what will be the expected consequence?

• The fish becomes dehydrated and dies

• The fish becomes bloated and dies

• The fish suffers from fungal or bacterial disease and dies

• The fish suffers from fungal or bacterial disease and dies

Which one of the following is a good electrical conductor?

• Graphite

• Diamond

• Peat

• Peat