Ocean thermal energy is due to:

• tides in the ocean
• pressure difference at different levels in the ocean
• temperature difference at different levels in the ocean
• energy stored by waves in the ocean

Which of the following compounds is used in fire extinguishers ?

• Sodium carbonate
• Sodium bicarbonate
• Sodium nitrate
• Sodium sulphate

Which of the following is the largest ecological unit ?

• Organism
• Population
• Biome
• Ecosystem

A fuse wire has :

• high resistance and high melting point
• low resistance and high melting point
• low resistance and low melting point
• high resistance and low melting point

In a society the growth and development that meets the current human needs and also conserves natural resources for future generations is known as:

• Green economy
• Holistic development
• Sustainable development
• Subsistence agriculture

A rocket functions on which of the following laws ?

• Newtons first law
• Newtons second law
• Newtons third law
• All of the above

Green Revolution is associated with:

• Agriculture
• Sericulture
• Fishery
• Cultivation of bees

Which of the following is an anaesthetic gas ?

• Nitrogen dioxide
• Nitrous oxide
• Nitric oxide
• Nitrogen

Which of the following statements is not correct ?

• Silver Revolution refers to increased pulse production.
• White Revolution refers to increased milk production.
• Green Revolution refers to increased production of food grains.
• Yellow Revolution refers to increased oil-seed production.

The process in which living organisms are used to remove contaminants, pollution or other unwanted substances from soil or water is known as:

• Biotechnology
• bioremediation
• Biodegradation
• Biomagnification