Among the following substances, Gasoline is a mixture. The correct option is (b).
Octane, heptane, and other hydrocarbon molecules obtained from petroleum are all mixed together to make petrol. The gasoline utilized in engines is not a single, pure material but rather a mixture of several different compounds.
Baking soda (a), salt (c), and sugar (d) are pure ingredients as opposed to mixes. While sugar (sucrose) is a pure organic component, baking soda (sodium bicarbonate) and salt (sodium chloride) are substances with particular chemical compositions.
Hence, the correct option is (b).
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Answer:
Option (D)
Explanation:
There are two types of materials.
1. Conductors: The materials which can allow the heat to pass through it are called conductors. For example, iron, copper, etc.
2. Insulators: The materials which do not heat to pass through it are called insulators. For example, plastic, wood, rubber, etc.
Here plastic handle does not feel hot because it is an insulator and it does not allow to pass the heat through it.
Answer: The correct answer is green house effect.
Explanation:
Green house effect:It is a process in which the infrared rays coming from the sun gets absorbed or re-emitted in the atmosphere. In this way the heat is trapped in the atmosphere.
In the given problem, glass windows allow light in, but trap the heat inside. This effect is due to the green house effect.
Convection: It is a process in which there is an actual movement of heat particle.
Conduction: It is a process in which there is no actual movement of the particle. It transfers heat directly from one place to another.
Global warming: The gradual increase in the overall temperature of earth's atmosphere that causes change in the climate. It is the result of the green house effect.
Therefore, glass windows allow light in, but trap the heat inside. This describes green house effect.