The good sources of Vitamin-C are________?

A. Green leafy vegetables
B. Seeds
C. Fresh vegetables and fruits
D. Sea foods

The good sources of iodine are_______?

A. Green leafy vegetables
B. Seeds
C. Fresh vegetables and fruits
D. Sea foods

The gas, commonly known as “laughing gas”, is

A. Carbon dioxide
B. Sulfur dioxide
C. Nitrous oxide
D. Sodium oxide

The source of oxygen in photosynthesis is

A. Water
B. Salts
C. Minerals
D. Glucose

The natural fats and oils are composed of_________?

A. Carbon, hydrogen and oxygen
B. Carbon, hydrogen and nitrogen
C. Carbon, oxygen and nitrogen
D. Hydrogen, oxygen and nitrogen

The energy value of food is measured in_______?

A. Joule
B. Calories
C. Tesla
D. Proteins

Wind energy is the __________ energy.

A. Potential
B. Transverse
C. Kinetic
D. Mechanical

Acid rain is mainly caused by emissions of __________ in the atmosphere?

A. Sulfur dioxide and potassium nitrate
B. Sulfur and charcoal
C. Nitrogen oxide and potassium nitrate
D. Sulfur dioxide and nitrogen oxide

About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is?

A. Oxygen
B. Cabon dioxide
C. Silicon
D. Clay

The fourth state of matter is?

A. Water
B. Salts
C. Vapours
D. Plasma