Short Answer Questions.Give reasons for the following statements.1. Tungsten is used in filaments.2. Mercury is used in thermometers.3. Platinum, gold and silver are used to make jewellery4. Iron objects are electroplated5. Most metal objects are paintedII.A.

Short Answer Questions.Give reasons for the following statements.1. Tu

1.	Short Answer Questions.Give reasons for the following statements.1. Tungsten is used in filaments.2. Mercury is used in thermometers.3. Platinum, gold and silver are used to make jewellery4. Iron objects are electroplated5. Most metal objects are paintedII.A.
Answer» <p>1. Pure tungsten has some amazing properties including the highestmeltingpoint (3695 K), lowest vapor pressure, and greatest tensile strength out of all themetals.Because of these properties it is the most commonly used material forlight bulbfilaments</p><p>2. Mercury is the only one in liquid state at room temperature. It's used in thermometers because it hashigh coefficient of expansion. </p><p>Hence, the slightestchangein temperature is notable when it's used in a thermometer. It also has ahighboiling point which makes it very suitable to measure higher temperatures.</p><p>3. Goldandplatinumare even known as noble metals. They are not affected by air, water and even by chemicals. Since they have bright lustre,jewellerycan be made from them. ..</p><p>4. Objects are electroplatedto make them attractive or to protect them against corrosion.</p><p>Electroplatingis the coating of a metal objectby a thin layer of another metal(s) during electrolysis</p><p>5. Paintprevents the oxygen molecules from interacting with the underlying material to form an oxide. It's a protective barrier. Rust is a common name for iron oxide, butmost metalscan oxidize.</p>