Chemistry

    Chemistry
    Which is the most electronegative element?
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    Environmental Chemistry: Water
    Which of the following is a disease in which excess of bile from the liver enters the blood and causes yellowness of skin and eyes?
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    Environmental Chemistry: Atmosphere
    Clouds are formed in which layer of atmosphere mostly?
    Most clouds are formed in the troposphere, the lowest layer of the atmosphere. The troposphere is where most of the Earth’s weather occurs, and it is where the water cycle takes place. The troposphere is heated from the ground, and this heat causes the air to rise. As the air rises, it cools, and this cooling causes water vapor to condense into clouds.
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    Environmental Chemistry: Water
    Water in swimming pools is purified by adding
    The most common way to purify swimming pool water is to add chlorine. Chlorine is a strong disinfectant that kills bacteria, algae, and other microorganisms. It is added to the water in liquid, tablet, or granular form. Chlorine can be effective in keeping swimming pool water clean and safe, but it is important to use it properly. Too much chlorine can irritate the skin and eyes, and it can also produce harmful byproducts.
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    Chemical Industries
    The percentage of nitrogen in urea is about:
    The percentage of nitrogen in urea (CH4N2O) is 46.6%. To calculate the percentage of nitrogen in urea, we can use the following formula: (mass of nitrogen / mass of urea) * 100% The mass of nitrogen in urea is 28 g/mol, and the mass of urea is 60 g/mol. Therefore, the percentage of nitrogen in urea is: (28 g/mol / 60 g/mol) * 100% = 46.6%
    Author: rikazzz Comment
    Environmental Chemistry: Water
    Permanent hardness of water is caused due to the presence of dissolved
    Permanent hardness of water is caused due to the presence of dissolved chlorides and sulphates of calcium and magnesium. These salts do not precipitate out of solution when the water is boiled, hence the name “permanent” hardness. Temporary hardness of water is caused due to the presence of dissolved bicarbonates of calcium and magnesium. These salts can be removed by boiling the water, as the bicarbonates will decompose into carbon dioxide and water, leaving behind the calcium and magnesium ions.
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    Chemistry
    The electrolyte used in lead storage battery is dilute solution of:
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    Chemistry
    Which Halogen exists in liquid state?
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    Chemistry
    Density of a gas increases, when its:
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    Chemistry
    The sum of the mole fraction of solute and solvent is:
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