Question

class 10 student please answer my question section a all parts

Answer 1

Q1)x
Q2)a
Q3)b hope it helps thnx in advance

Answer 2

1]Complete step by step answer:

Compounds Like Silver chloride are light-sensitive and they may react to light very fast to easily undergo photolytic decomposition reaction and lose their properties.

Here AgCl is converted to molecular Ag atoms by the effect of photons of light.

Dark-colored bottles interrupt the path of light such that light cannot reach silver chloride in the bottles and its decomposition is prevented. It is known that silver chloride decomposes to silver and chlorine in the presence of light. This silver formed is microscopic and turns blackish-grey in color. Hence, we lose the use of silver chloride. That's why they are to be stored in dark bottles to prevent the entry of light.

This is shown in the reaction given below:

2AgCl(s)→2Ag(s)+Cl2(g)

Other salts of silver are also examples, such as silver nitrate and Hydrogen peroxide also has a similar action.

Therefore, we explained why we store silver chloride in dark-colored bottles.

2]Saliva contains special enzymes that help digest the starches in your food. An enzyme called amylase breaks down starches (complex carbohydrates) into sugars, which your body can more easily absorb. Saliva also contains an enzyme called lingual lipase, which breaks down fats

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7]1)Due to formation of a protective layer of aluminium oxide by oxygen on aluminium surface, it is less easily corroded than iron.

2)Sodium in water catches fire due to formation of hydrogen gas and evolution of heat.

2Na+2H₂O⇒2Na⁺+2OH⁻+H₂↑

Note: In exothermic process, heat is released. The reaction of Na with water is highly exothermic. Due to rapid increase in temperature, hydrogen gas catches fire.

3)Amphoteric oxide are those which can rect with both acids and bases , zinc oxide reacts with both of them therefore it's considered an amphoteric acid .Because zinc oxide can reacts with both acids and bases. therefore it is an amphoteric oxide.

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