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Aluminum is ideal for aircraft manufacture because it’s lightweight and strong. Aluminum is allowing an aircraft to carry more weight and become more fuel efficient. Furthermore, aluminum’s high resistance to corrosion ensures the safety of the aircraft and its passengers.

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across .

Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons). The difference in mass between the reactants and products is manifested as either the release or the absorption of energy.
At very high temperatures in the interior of the sun, protons fuse to form helium nuclei.
This fusion process occurs inside the core of the Sun, and the transformation results in a release of energy that keeps the sun hot.

Chlorophyll or leaf green is a porphyrin derivative with magnesium as the central atom and is hence a metal complex dye. It is present in the chloroplasts in all green parts of plants as a mixture of blue green chlorophyll a and yellow green chlorophyll b, and constitutes the catalyst for photosynthesis.

Grignard reagents are formed by the reaction of magnesium metal with alkyl or alkenyl halides. They’re extremely good nucleophiles, reacting with electrophiles such as carbonyl compounds (aldehydes, ketones, esters, carbon dioxide, etc) and epoxides.

?The conductivity of semi conductors is higher than that of insulators, but lower than that of conductors.

?An n-type semiconductor is doped by donor impurity.

?The charge carrier in P- type semi conductor is hole.

? The device required to convert AC current to DC is called Diode

?The process of conversion of AC in to DC by using a diode is called Half wave rectification

? Pure semi conductors are intrinsic

? If a diode is connected in series with AC circuit, it becomes reverse biased and hinder the flow of current when the direction of flow of AC current is changed. This Causes to stop conduction. Then the output voltage becomes only one half of the input voltage and it functions as a half wave rectifier.

? The device required to convert AC current to DC is called diode

? The process of conversion of AC in to DC by using a diode is called Half wave rectification

Ethyl acetate is the acetate ester formed between acetic acid and ethanol. It has a role as a polar aprotic solvent . It is an acetate ester, an ethyl ester and a volatile organic compound.

Ethyl acetate is a widely used solvent, especially for paints, varnishes, lacquers, cleaning mixtures, and perfumes. In the lab, ethyl acetate is a common solvent for column and thin-layer chromatography.

? Irregular and partial reflection of light during its passage through a medium is known as scattering of light.

? When red light traverses through the air in long distances it undergoes least scattering. So it reaches our eyes with out considerable loss of intensity.

? This is why red colour is choosen for signal lamp.

? Irregular and partial reflection of light during its passage through a medium is known as scattering of light.

? When violet light traverses through the air in long distances it undergoes scattering. So it reaches our eyes with considerable loss of intensity.

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