1st semester question paper solved
Fill in the blanks:- Bronze is an alloy of copper and tin. Chamois leather is used for cleaning glass and silver polishing. Squeegee is used to remove excess water from floors. Sweeping is done before Mopping . Brass is an alloy of copper and zinc. pH denotes the acidity and alkalinity of substances. Saponification is a reaction in which fats/oils reacts with alkali to form soap. Faucet is another term for taps. Baking soda is used to polish brass. Parquet is a Floor finish. Chemical name of washing soda is Sodium Carbonate . Surfactant is a surface active compounds that impart a good wetting power and suspending power to detergent. A pink oxide of iron used as a fine abrasive for polishing silver is called Jeweler’s Rouge . Aerosol particles dispersed in gas packed under pressure with a device for releasing it as a fine spray. Whirlpool baths are known as Bathtub . Chandelier are decorative and delicate lamps used mainly in lobbies,banquet halls and suit