The Earth’s atmosphere is primarily composed of Nitrogen gas, which makes up roughly 78% of the air we breathe by volume.
32. A method used for preserving chilies:
(A) Boiling
(B) Drying
(C) Canning
(D) Salting
Answer:
(B) Drying
Explanation:
Drying (removing moisture, typically by laying them out in the sun) is the most traditional and effective method to preserve chilies for extended periods, preventing mold and bacterial growth.
33. In a solution of sugar and water, what is solute ?
(A) sugar
(B) water
(C) salt
(D) none of these
Answer:
(A) sugar
Explanation:
In chemistry, a solution consists of a solute (the substance being dissolved) and a solvent (the liquid doing the dissolving). Here, the sugar is the solute dissolving into the water solvent.
34. The process by which a new product from waste material is called
(A) Reducing
(B) Reusing
(C) Recycling
(D) Recurring
Answer:
(C) Recycling
Explanation:
Recycling involves collecting, processing, and industrially transforming waste materials (like plastic, glass, or paper) into brand new, usable products.
35. Organisms which feed on decaying matter.
(A) Herbivores
(B) Carnivores
(C) Omnivores
(D) Decomposers
Answer:
(D) Decomposers
Explanation:
Decomposers, such as fungi, earthworms, and various bacteria, are organisms that break down dead or decaying biological matter, returning essential nutrients back into the ecosystem.
