The edible part of potato is

• Root
• Tuber
• Rhizome
• Corm
Correct Option: B  [ Tuber ]

Remark: Stems get modified into underground structures for storage of food as seen in potato called tuber.

One of the constitutes of tear gas is:

• Ethane
• Ethanol
• Ether
• Chloropicrin
Correct Option: D  [ Chloropicrin ]

Remark:

Shadows are formed when a __________ object comes in the path of light.

• Opaque
• Transparent
• Luminous
• Translucent
Correct Option: A  [ Opaque ]

Remark:

Which of the following is not a renewable source of energy ?

• Natural gas
• Geothermal energy
• Flowing water
• Biomass
Correct Option: A  [ Natural gas ]

Remark:

Yellow revolution is related to:

• cereals
• oilseeds
• milk
• none of these
Correct Option: B  [ oilseeds ]

Remark:

Threat of 'global warming' is increasing due to increasing concentration in the atmosphere of:

• O₃
• CO₂
• SO₂
• NO₂
Correct Option: B  [ CO₂ ]

Remark:

Which of the following is a source of non-conventional energy?

• Firewood
• Diesel
• Petrol
• Biogas
Correct Option: D  [ Biogas ]

Remark:

Which instrument is used for measuring humidity of atmosphere?

• Barometer
• Anemometer
• Thermometer
• Hygrometer
Correct Option: D  [ Hygrometer ]

Remark:

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
Correct Option: B  [ bioremediation ]

Remark:

J J Thomson received the Nobel Prize in Physics for the discovery of ________.

• Protons
• Electrons
• Neutrons
• Positrons
Correct Option: B  [ Electrons ]

Remark: