Nitrogen fixation is a process of

• Assimilation of nitrate

• Utilisation of nitrogen gas

• Conversion of organic nitrogen to proteins

• Conversion of organic nitrogen to proteins

Copper wires are generally used for electrical power transmission instead of iron wire because

• copper is cheaper than iron

• copper is lighter than iron

• copper is a better conductor of electricity than iron

• copper is a better conductor of electricity than iron

The study of mountains is known as

• Oncology

• Lithology

• Orology

• Orology

Ozone layer is formed due to reactions of

• oxygen and ultraviolet rays

• carbon dioxide and layers of atmosphere

• cosmic rays and layers of atmosphere

• cosmic rays and layers of atmosphere

The solar energy produced by

• Fusion reaction

• Fission reaction

• Combustion reaction

• Combustion reaction

Which acid is used in Lead storage battery?

• Sulphuric acid

• Nitric acid

• Hydrochloric acid

• Hydrochloric acid

Person who is colour-blind cannot distinguish between

• Black and yellow

• Red and green

• Yellow and white

• Yellow and white

Which of the following caused radioactive pollution along the coast of kerala?

• Plutonium

• Zinc

• Thorium

• Thorium

In water treatment plant, use of chloramines ensures ...........

• taste and odour control

• weed control in reservoirs

• disinfection

• disinfection

The second Green Revolution aims at increasing agricultural output to promote

• Availability of easy credit to big farmers

• Co-operative farming

• Inclusive growth

• Inclusive growth