The rusting of the iron is the example of:

• Oxidation
• Reduction
• Polymerisation
• Galvanization
Correct Option: A  [ Oxidation ]

Remark:

Which one of the following is a chemical change?

• Melting of ice
• Magnetising of Iron
• Burning of coal
• None of these
Correct Option: C  [ Burning of coal ]

Remark: A chemical change, also called a chemical reaction, happens when substances combine or break apart to form entirely new substances with different properties.

Ramsar Convention is for the conservation of:

• Mountain
• Grassland
• Forest
• Wetland
Correct Option: D  [ Wetland ]

Remark:

Which of the following colours is not a primary colour ?

• Red
• Yellow
• Green
• Blue
Correct Option: B  [ Yellow ]

Remark:

What is the purpose of 'Anemometer'?

• To measure blood pressure.
• To measure the velocity and to find the direction of wind.
• To measure altitude.
• none of these.
Correct Option: B  [ To measure the velocity and to find the direction of wind. ]

Remark:

Xylem helps in transportation of which of the following?

• food
• water
• nutrient
• both food and water
Correct Option: B  [ water ]

Remark:

What makes a lemon sour?

• Tartaric acid
• Oxalic acid
• Citric acid
• Hydrochloric acid
Correct Option: C  [ Citric acid ]

Remark:

Which of the following will not cause any atmospheric pollution ?

• Hydrogen
• Sulphur dioxide
• Carbon dioxide
• Carbon monoxide
Correct Option: A  [ Hydrogen ]

Remark:

Green muffler is used against which type of pollution ?

• Air
• Noise
• Soil
• Water
Correct Option: B  [ Noise ]

Remark:

Oncology is the study of

• Branch of science that deals with eyes
• Branch of science that deals with Brain
• Branch of science that deals with Tumours and Cancers
• Branch of science that deals with Blood Circulation
Correct Option: C  [ Branch of science that deals with Tumours and Cancers ]

Remark: